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Home My WebLink AboutItem 5C - 2420 10th St. LB Memo 12.01.21 MEMORANDUM TO THE LANDMARKS BOARD December 1, 2021 STAFF Jacob Lindsey, Director of Planning & Development Services Charles Ferro, Interim Comprehensive Planning Manager Lucas Markley, Assistant City Attorney James Hewat, Principal Historic Preservation Planner Marcy Cameron Gerwing, Senior Historic Preservation Planner Clare Brandt, Administrative Specialist II Faith Hamman, Historic Preservation Intern LANDMARK ALTERATION CERTIFICATE REQUEST Public hearing and consideration of an application to replace windows with new wood double-hung windows (HIS2021-00250), 2420 10th St. in the Mapleton Hill Historic District, pursuant to Section 9-11-18 of the Boulder Revised Code 1981, and under the procedures prescribed by chapter 1-3, “Quasi-Judicial Hearings,” B.R.C. 1981. Address: 2420 10th Street Owner: Janon, LLC Applicant: Neal Evers Case Numbers: HIS2021-00280 Case Type: Landmark Alteration Certificate Code Section: 9-11-18, B.R.C., 1981 SITE INFORMATION Historic District: Mapleton Hill Historic District Date of construction: c. 1904 Zoning: RMX-1 (Residential Mixed– 1) Lot size: 6,210 sq. ft. (County assessor) House size: Approximately 3,100 sq. ft. STAFF RECOMMENDATION Staff recommends the Landmarks Board conditionally approve the application. Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 1 of 41 RECOMMENDED MOTION I move that the Landmarks Board adopt the staff memorandum dated December 1, 2021, as the findings of the board and approve a Landmark Alteration Certificate to replace the windows at the non- contributing house located at 2420 10th St., in the Mapleton Hill Historic District as shown on plans dated November 3, 2021, finding that the proposal meets the Standards for Issuance of a Landmark Alteration Certificate in Chapter 9-11-18, B.R.C. 1981 and is generally consistent with the Mapleton Hill and General Design Guidelines. BACKGROUND AND SUMMARY • The Edwardian Vernacular house was constructed around 1904. Citing non-historic alterations to the house, the Historic Building Inventory Record Survey (1993-1996) recommends it not contributing to the Mapleton Hill Historic District, and not eligible for individual listing in the National Register of Historic Places. • Two Landmark Alteration Certificate applications, HIS2021-00250 and HIS2021-00255, were reviewed on October 13, 2021 (R. Pelusio and A. Daniels.) Landmark Alteration Certificates were issued on October 15, 2021 to replace windows on the 1978 tower addition with new solid wood double-hung windows; replace rotten upper cedar shake with cedar shingle at varied widths and paint Sherwin Williams SW 2829 "Classical White" to match existing (HIS2021-00250); and for 107 sf unconditioned storage addition to accessory building, replace windows and doors in existing accessory building, convert to ADU (HIS2021-00255). • The proposed scope of work includes replacing windows with new wood double-hung windows. At the October 13, 2021 Landmarks Design Review Committee, the Ldrc recommended rehabilitation of these windows in lieu of replacement in consideration of the house may be contributing to the Mapleton Hill Historic District. The applicant is now requesting consideration of replacement of the windows by the Landmarks Board. • A number of significant alterations to the house have occurred outside the defined 1865-1946 period-of-significance for the Mapleton Hill Historic District, that staff considers have cumulatively resulted in a loss of historic architectural integrity, so that it should be considered non-contributing. • Staff recommends the current proposal to replace seven windows is generally consistent with Mapleton Hill and General Design Guidelines approach to the treatment of non-contributing buildings and will meet the criteria for a Landmark Alteration Certificate as per 9-11-18(a) & (b)(1)-(4) B.R.C. 1981. PROPERTY DESCRIPTION The 6,210 sq. ft. property is located on the east side of 10th Street, between Portland Place and Maxwell Avenue in the Mapleton Hill Historic District. Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 2 of 41 Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 3 of 41 • c.1900 one and one half-story brick and wood-frame Edwardian-Vernacular house on stone foundation. • Cross-gabled roof with overhanging eaves; hipped tower at southwest corner added c.1978. • Dentil trim above second-story tripartite window; and pent-roof between stories. Enclosed front porch spans façade, with weatherboard base and bands of double-hung windows with divided upper sashes. • Double-hung windows with segmental brick arches and stone sills on sides of house. Semi- circular stained-glass windows; moon and stars motif on tower. (Architectural description from the Historic Building Inventory Record 1993-1996). Figure 3. Northwest corner of 2420 10th Street, November 2021. Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 4 of 41 Figure 4. Southwest corner, November 2021 Figure 5. Rear elevation of 2420 10th Street. ALTERATIONS • Permit records indicate the Wolff/Lyon Architecture firm remodeled and added the tower addition to the house in 1978 and prior to the designation of Mapleton Hill Historic District. • Original (open?) front porch appears to have been enclosed sometime after the house was constructed and before 1929 (Tax Assessor image). It was converted into an open porch with cascading front stair in 1999. Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 5 of 41 • An accessory building was demolished in 1995. In 2001, a new accessory building was constructed towards the rear of the lot. • A 1,500 sq. ft. two-story rear addition was added to the existing 1,600 sq. ft. house in 2003. PROPERTY HISTORY • Edwardian Vernacular house is estimated to have been constructed about 1904. • The 1913 Boulder City Directory lists John and Margret Schamel, and their daughter Grace, at this address. • A later owner was Louis E. Saleh. (Property history from the Historic Building Inventory Record 1993-1996). Figure 6. c.1929 Tax Assessor photograph (left) and 1994 Historic Building Inventory Record photographs (right) HISTORIC ARCHITECTURAL INTEGRITY – CONTRIBUTING VS. NON-CONTRIBUTING • Edwardian Vernacular house appears to have modified prior to 1929 with enclosure of front porch with four over one double-hung sash and clapboard siding. • In 1978, distinctive front gable altered with the addition of a tower that rises about 2’ higher than the historic roof. • 1994 Historic survey of the house by Front Range Associates indicates that at time the building was considered to be non-contributing as a result of alterations to it having, “reduced its historic integrity”. • June 2001 review by the Landmarks Board for for the construction of a new garage (LAC2001- 09), the property was considered to be non-contributing. • July 2003 landmark alteration certificate issued by Ldrc for the construction of rear addition (HIS2003-00161) – Unclear as to whether status of property discussed, however photographs indicate front porch had been opened up prior to this review. Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 6 of 41 • At October 2021 review for the replacement windows (HIS2021-00255), members of the Ldrc suggested that, in-spite-of non-historic alterations, the house might be considered as contributing and suggested that historic windows on the primary and secondary faces should be rehabilitated as opposed to replaced. • Staff considers that based upon analysis of changes to house outside of the 1865-1946 period- of-significance for the Mapleton Hill Historic District including conjectural opening of front porch, 1978 addition of tower at façade, and construction of 1,500 sq. ft. rear addition, it should be considered non-contributing. SCOPE OF PROPOSED WORK • Replacement of set of three double-hung windows on west-facing gable (primary elevation) with all- wood thermal pane windows to match existing; Figure 7. Proposed west (primary) elevation window replacement (red) • Replacement of three double hung windows on north (secondary elevation) with all-wood thermal pane windows to match existing: Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 7 of 41 Figure 8. Proposed north (secondary) elevation window replacement (red). • Replacement of three double hung windows on south (secondary elevation) with all-wood thermal pane windows to match existing: Figure 9. Proposed south(secondary) elevation window replacement (red) Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 8 of 41 Figure 10. Proposed replacement window details. CRITERIA FOR REVIEW The Landmarks Board and the City Council shall not approve an application for a Landmark Alteration Certificate unless each such agency finds that the proposed work is consistent with the purposes of this chapter. Neither the Landmarks Board nor the City Council shall approve a Landmark Alteration Certificate unless it meets the following conditions: Does the proposed application preserve, enhance, or restore, and not damage or destroy the exterior architectural features of the landmark or the subject property within a historic district? Staff considers that the property is non-contributing to the Mapleton Hill Historic District and that the requested replacement of existing windows with all wood windows to match the existing will be generally consistent with the purposes of this chapter. Does the proposed application adversely affect the special character or special historic, architectural, or aesthetic interest or value of the landmark property? Staff considers that the property is non-contributing to the Mapleton Hill Historic District and that the requested replacement of existing windows with all wood windows to match the existing is generally consistent as they are generally consistent with the General Design Guidelines and the Mapleton Hill Historic District Design Guidelines. Is the architectural style, arrangement, texture, color, arrangement of color, and materials used on existing and proposed structures compatible with the character of the landmark property? Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 9 of 41 The property is not landmarked and staff considers it not to be a contributing element to the Mapleton Historic District. In determining whether to approve a Landmark Alteration Certificate, the Landmarks Board shall consider the economic feasibility of alternatives, incorporation of energy-efficient design and enhanced access for the disabled. Specific information specific to economic feasibly of alternatives, incorporation or energy-efficiency design and enhance access for the disabled was not submitted with the application. The reuse of an existing building is inherently sustainable, and the rehabilitation of the building will need to meet the City’s energy code regulations and Section 106.5 helps ensure that any alterations needed to meet the energy will not detract from the historic character of the site. DESIGN GUIDELINE ANALYSIS The Historic Preservation Ordinance sets forth the standards the Landmarks Board must apply when reviewing a request for a Landmark Alteration Certificate (LAC). The Board has adopted the General Design Guidelines for Boulder’s Historic Districts and Individual Landmarks to help interpret the ordinance. Design guidelines are intended to be used as an aid to appropriate design and not as a checklist of items for compliance. SUMMARY 3.7 Windows Staff considers that because the building is non-contributing to the Mapleton Historic District, and for this reason the windows proposed for replacement are not historically important and may be replaced with the all-wood window system proposed. PUBLIC COMMENT Staff has received no public comment on this case. FINDINGS Staff recommends the Landmarks Board adopt the following findings: Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 10 of 41 The Landmarks Board finds that the project meets the standards for issuance of a Landmark Alteration Certificate set forth in Section 9-11-18, “Standards for Landmark Alteration Certificate Applications,” B.R.C. 1981. In reaching this conclusion, the Board considers the information in the staff memorandum dated December 1, 2021, and the evidence provided to the Board at its November 1, 2021. Specifically, the Board finds that: 1. The proposal will be generally consistent with the purposes of this chapter, in that the proposed replacement of windows on the non-contributing house is appropriate and will not damage the historic character of the Mapleton Hill Historic District. 2. The proposed replacement is consistent with Section 3.7 of the General Design Guidelines and meets the Standards for Issuance of a Landmark Alteration Certificate as set out in Section 9-11- 18(b)(3) of the Boulder Revised Code 1981. ATTACHMENTS Attachment A: Historic Building Inventory Form (link) Attachment B: Applicant Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 11 of 41 NEAL EVERS, AIA Neal Evers Architecture, LLC PO Box 34, Lyons, CO 80540 | 405-880-6946 | nealevers@gmail.com 11.02.21 City of Boulder Landmarks Board 1739 Broadway, 3rd Floor Boulder, CO 80304 Historic Preservation Landmark Alteration Certificate – Application Resubmittal Project Address: 2420 10th St Application Number: HIS2021-00250 Dear City of Boulder Landmarks Board: The following application resubmittal is in appeal of the LDRC’s October 15th issuance of a Landmark Alteration Certificate for HIS2021-00250. The appeal to the Landmarks Board is to allow a complete window replacement. The 1996 Historical Building Inventory Record suggests that the property has no special significance to the Mapleton Hill Historic District and furthermore suggests that the “alterations to this house have reduced its historic integrity.” Some of the alterations referenced are to the front elevation of the house, and was previously upheld by the City of Boulder under PMT1999-03785 to convert an enclosed porch to an open porch. The conversion represents a front-elevation-defining architectural alteration of which there is no recorded historical reference to, continuing to set a strong precedence that bridges the continued lack of historical significance of the property. The October 15th LAC suggests that the historical significance of the windows are confused by the structure’s alterations to the original and now barely recognizable Edwardian Vernacular style. The case made during the LDRC for denial of the full window replacement was a conversational determination that the Committee wouldn’t approve a full demolition of the property (which was not applied for) and therefore wouldn’t now set the precedent of historical insignificance by approving a window replacement. In doing so the LDRC decided against the 1999 permit precedent and the 1996 Building Inventory and decided that the house is now individually and significantly contributing to the Mapleton Historic District. This ruling subsequently led to the denial of the proposed window replacement. This appeal would like to call into question the fairness of LDRC’s determination. Lastly, the replacement of the windows is not an attempt to change the character of the house. The proposed window (attached in the application) is an aesthetic-like and material-like replacement. This is further demonstrated in the original LAC application to replace siding on the house that is deteriorating with maintenance-heavy cedar shingle that are like-material and like-aesthetic. The intent of this alteration is to preserve the existing aesthetic of the property while improving climate and safety performance measures. As this property is West of Broadway, it falls within the increased ultimate wind velocity range of the Boulder Revised Code. The new windows would allow the house to meet current performative requirements of the Boulder Revised Code—both COBECC and ultimate wind Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 12 of 41 2 velocity considerations—while also preserving the non-historic, but still-charming aesthetic of the house. Thank you for your consideration of this appeal to the Landmarks Board by LAC application resubmittal. I look forward to discussing more with the Board at the next available and earliest convenience. Sincerely, Neal Evers, AIA | Owner & Principal Architect Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 13 of 41 Planning & Development Services | 1739 Broadway, 3rd Floor P.O. Box 791 Boulder, CO 80306 303-441-1880 boulderplandevelop.net Page 1 of 5 Updated March 2021 HIS - Historic Preservation Landmark Alteration Certificate (LAC) Application REQUIRED MATERIALS FOR PROPOSED EXTERIOR WORK TO ALL PROPERTIES IN DESIGNATED HISTORIC DISTRICTS AND INDIVIDUALLY LANDMARKED  Signed application  Current site plan and photographs of the property, including the view from the street. See page 2.  Other materials defined by project type and scope. See page 5 for a checklist or required materials. TO SUBMIT YOUR LANDMARK ALTERATION CERTIFICATE (LAC) APPLICATION •Save your materials as PDFs using the naming conventions in the Online Plan Application Guide •Email application to PDSskipatrip@bouldercolorado.gov. Put Historic Preservation in the subject line. •Questions? Contact Historic Preservation staff at 303-441-1994 or historic@bouldercolorado.gov •Si necesita ayuda para traducir esta información al español, llame al 303-441-1905 APPLICANT CONTACT INFORMATION Name Phone # Email Address Address City State Zip OWNER CONTACT INFORMATION SAME AS APPLICANT Name Phone # Email Address Address City State Zip PROJECT INFORMATION THE WORK WILL NEED TO MEET THE GENERAL DESIGN GUIDELINES AND ANY DISTRICT-SPECIFIC DESIGN GUIDELINES (LINKS BELOW). Project Address Historic District (Check one. Search the map of Landmarks and Historic Districts.) Chamberlain Chautauqua Downtown Floral Park Highland Lawn Hillside Mapleton Hill University Place West Pearl 16th Street Individual Landmark Name: Project Description Date: PLAN 4 4 4 Neal Evers, AIA 405-800-6946 nealevers@gmail.com 435 Park St Lyons CO 80540 Janon, LLC n/a n/a PO Box 540 Portsmouth NH 03802 11/02/2021 2420 10th St 4 Window replacement Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 14 of 41 Planning & Development Services | 1739 Broadway, 3rd Floor P.O. Box 791 Boulder, CO 80306 303-441-1880 boulderplandevelop.net Page 2 of 5 Updated March 2021 EXISTING CONDITIONS FOR ALL APPLICATIONS ATTACHED AS SEPARATE PDF Location Map / Site Plan (paste here or attach as separate PDF) - survey, ILC or screenshot of aerial map showing adjacent streets. Photographs of each side / elevation of the building (paste here or attach as separate PDF) front rear side side 4 Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 15 of 41 Planning & Development Services | 1739 Broadway, 3rd Floor P.O. Box 791 Boulder, CO 80306 303-441-1880 boulderplandevelop.net Page 3 of 5 Updated March 2021 REQUIRED MATERIALS ATTACHED AS SEPARATE PDF Color chips, samples and/or cut sheets for painting and/or roofing work (paste here or attach as separate PDF) STOP HERE IF THE SCOPE OF WORK IS LIMITED TO THESE ITEMS (CHECK ALL THAT APPLY): Roofing Painting Location of proposed work detailed on plan or mockup (paste here or attach as separate PDF) STOP HERE IF THE SCOPE OF WORK IS LIMITED TO THESE ITEMS (CHECK ALL THAT APPLY): Landscaping Antenna or mechanical unit Commercial awning Commercial sign Commercial patio Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 16 of 41 Planning & Development Services | 1739 Broadway, 3rd Floor P.O. Box 791 Boulder, CO 80306 303-441-1880 boulderplandevelop.net Page 4 of 5 Updated March 2021 Scaled elevations (for fences, show all dimensions including spacing between pickets*) existing proposed existing proposed existing proposed existing proposed STOP HERE IF THE SCOPE OF WORK IS LIMITED TO THESE ITEMS (CHECK ALL THAT APPLY): Deck Outdoor kitchen In-ground pool or spa Fence located at front of house Fence at side or rear of house* Fence taller than 5ft.* *Side and rear fences with max height of 5’ with min 1” spacing between pickets can be reviewed by staff. Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 17 of 41 Planning & Development Services | 1739 Broadway, 3rd Floor P.O. Box 791 Boulder, CO 80306 303-441-1880 boulderplandevelop.net Page 5 of 5 Updated March 2021 CHECKLISTS FOR OTHER SCOPES OF WORK For the following scopes of work, check all that apply and include separate PDFs of the required documentation: Solar panels Completed application, pages 1 - 4 Solar renderings New free-standing building 340 sq. ft. or smaller New free-standing building larger than 340 sq. ft. Demolition and new construction Addition Porch Completed pages 1 - 4 Scaled architectural plans / project drawings: Side by side existing and proposed, with annotated (measurable) scale. Initial code review for new construction. See section below. Doors Windows Skylights Completed pages 1 - 4 Doors / windows replacement worksheet. This supplement will be sent to the email address included on page 1 once the LAC application is accepted. INITIAL CODE REVIEW FOR NEW CONSTRUCTION This review is intended to identify potential zoning and building code issues for new construction only. Please fill out to the best of your ability. The verification of this form is a customer service review and does not constitute a formal review of all applicable codes and regulations. All sections of the Boulder Revised Code must still be adhered to prior to performing any work. Property information can be found on https://bouldercolorado.gov/planning/property-report Proposed work is within required setbacks Yes No Existing Proposed new Total after construction Allowed maximum Building coverage (sq. ft.) Floor area (sq. ft.) Height Will the proposed require a variance or exemption? (check all that apply): Setback variance (Section 9-7-2, B.R.C., 1981) Side yard wall articulation standards (Section 9-7-10, B.R.C., 1981) Solar exception (Section 9-9-17, B.R.C., 1981) Bulk plane requirements (Section 9-7-9, B.R.C., 1981) Exemption from maximum building coverage for accessory buildings in the rear setback (Section 9-7-ll(d), B.R.C., 1981) 4 4 4 4 Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 18 of 41 Front (West) ElevationAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 19 of 41 Side (North) ElevationAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 20 of 41 Side (South) ElevationAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 21 of 41 Rear (East) ElevationAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 22 of 41 Acc. Bldg Front (West) ElevAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 23 of 41 Acc. Bldg Side (South) ElevAttachment B - Application MaterialsItem 5C - 2420 10th St. LB Memo 12.01.2021 Page 24 of 41 City of Boulder Panning and Development Services WINDOW AND DOOR REPLACEMENT APPLICATION Windows and doors are very often character-defining features of a historic building, therefore applicants are encouraged to repair rather than replace historic windows and doors. However, if the condition of the feature is determined to be deteriorated beyond repair, it is important that the replacement feature is compatible with the style and character of the building. A Landmark Alteration Certificate is required for the replacement of historic windows and doors on buildings located in a historic district and for individual landmarks. Review by the Landmarks Design Review Committee is required for window and door replacement and the project may be referred to the full Landmarks Board for review if the committee considers the replacement is inconsistent with the guidelines and may be to the detriment of the property and/or the historic district. The condition and location of the windows or doors proposed for replacement must first be identified before submitting the replacement product information. Part I will be reviewed by staff and may be reviewed by the LDRC; if window(s) and/or door(s) are appropriate candidates for replacement, a second application must then be submitted identifying the proposed replacement windows or doors. The complete application will then be reviewed by the LDRC and may be referred to the full Landmarks Board for review. For more information about windows and doors on landmarked buildings and in historic districts and the process for assessing their historic significance, please consult sections 3.7 and 3.8 of the General Design Guidelines for Boulder’s Historic Districts and Individual Landmarks available on line at: http://www.bouldercolorado.gov/files/PDS/historicpres/pdfs/draftgenguidelines.pdf or by calling 303.441.1880. Part I: Identify existing location and condition of window(s) or door(s) proposed for replacement. The following materials are required as Part I of this application; see below for more information. □ Completed Landmark Alteration Certificate Application, Available through the Planning Department, 1739 Broadway or online at boulderhistoricpreservation.net □ Context photograph of the subject building, with labeled location of each windows or doors proposed for replacement. Photograph(s) of the building as viewed from public right-of-ways; if the building is located on a corner or is visible from an alley, multiple photographs should be taken. Windows or doors proposed for replacement should be labeled as “A1, A2, B1, B2…” depending on the location and number of the windows. A= primary elevation (if the building is located on a corner, two elevations may be considered primary), B= secondary (side) elevation, C= tertiary (typically the rear) elevation. If only one window or door is proposed for replacement, the photograph may simply be labeled ‘door’ or ‘window’. □ Photographs of each window or door proposed for replacement, showing the condition of the window or door. A minimum of three photographs of each window or door proposed for replacement is required as follows: 1. A photograph of the window or door from the exterior, showing the molding or other decorative features surrounding the window or door. 2. Close-up photograph of the window or door from the exterior, Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 25 of 41 showing the condition of the frame, sash, pane(s), and muntins (if applicable). 3. Close-up photograph of the window or door from the interior, showing the condition of the frame, sash, pane(s), and muntins (if applicable). □ A short description of the condition of each window or door proposed for replacement. A written description for each window or door proposed for replacement should include the following: 1. Description of the location of the window (e.g. “Window A1 is located on the second story on the north side of the house, which faces Dewey Avenue”) 2. The type of window or door (i.e. screen door, multi-paneled door, French door, or double-hung, leaded glass, divided-light, casement, hopper, or transom window) as well as the materiality (i.e. wood, aluminum, glass) and operation of the window, if applicable (i.e. double- hung vs. casement window). Description of the condition of the window or door, including the operability and condition of the frame, sash, sill, pane(s), muntins (if applicable) and casing condition (i.e. “Window A1 is a wooden, 4-over-1 double-hung window. The sash and sill are in a deteriorated state; the wood has rotted and there is an 1/8” gap when the window is fully closed. The muntins and pane are intact. Overall, the window is difficult to operate.”) Please submit a completed Landmark Alteration Certificate application and required information to a historic preservation planner for review. The project will be reviewed within 14 days, and if the proposed replacement of windows or doors is determined to be appropriate, Part II of the application shall be submitted and reviewed within 14 days by the design review committee and may be referred to the full Landmarks Board. Part II: Comparison of Existing Window(s) or Door(s) and Proposed Window(s) or Door(s). The following materials are required for Part II of this application: □ Completed Landmark Alteration Certificate Application □ Completed Part I of this application □ Information regarding the proposed window(s) or door(s) Windows and doors are character-defining features of a historic building, therefore applicants are encouraged to repair rather than replace historic windows and doors. However, if the condition of the feature is determined to be deteriorated beyond repair, it is important that the replacement feature is compatible with the historic windows and the historic character of the building. Detailed photographs or drawings, including dimensions, or a spec sheet is required for review of the proposed replacement window or door. □ Completed ‘Window or Door Replacement Application-Existing and Proposed Comparison’ form. The attached form allows a side-by-side comparison of the existing and proposed window or door. It is important that following characteristics are maintained: 1) the pattern and size of the openings 2) proportions of the frame and sash; Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 26 of 41 3) configuration of window panes; 4) muntin profiles; 5) type of wood; 6) paint color; 7) characteristics of the glass 8) associated details such as arched tops, hoods, or other decorative elements. The National Park Service Preservation Brief 9: The Repair of Historic Wooden Windows offers further guidance on repairing or choosing replacement windows. This brief is available at www.nps.gov. For more information on the appropriateness of window and door replacement, please refer to the General Design Guidelines, available online at: http://www.bouldercolorado.gov/files/PDS/historicpres/pdfs/draftgenguidelines.pdf or through the Long Range Planning office 303.441.1881. Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 27 of 41 A1: not approved for replacement during LDRC approved for replacement duringLDRC Attachment B - Application Materials Item 5C - 2420 10th St. LB Memo 12.01.2021 Page 28 of 41