Landmark Preservation reviews applications for accessory dwelling units on all Denver landmarks and historic district structures. Applications are reviewed for consistency with the appropriate design standards and guidelines. Please read the following instructions carefully to ensure timely design review of your project.
The following materials are not allowed for accessory structures in historic districts or on individual landmark properties:
For more information about appropriate materials, please review the design guidelines in Step 1.
Your location and type of project determines which design standards and guidelines you should follow. If you are unsure about whether your project is in a historic district, check the landmark and historic districts map.
In certain neighborhoods and historic districts, additional design guidelines may apply.
Accessory dwelling units are subject to review by the Landmark Preservation Commission and require a pre-application review meeting.
Projects in historic districts where an RNO has completed design review training must present infill proposals to the RNO before a complete application may be submitted for review by the LPC. Landmark staff will let you know if there is a qualifying RNO in place and, if so, make the referral at the time of your pre-application meeting.
For more information, download the Registered Neighborhood Organization policy (PDF).
Design review applications must adequately describe the project and provides sufficient information to evaluate the proposal. Documentation must clearly illustrate the existing conditions as well as any proposed alteration(s).
All applications for accessory dwelling unit design review must include the following information:
Please click the submittal elements for downloadable materials and additional information. To avoid delays, please only submit complete applications.
Photographs of existing conditions showing proposed building site and surroundings are required and must be:
All projects must submit a dimensioned and scaled site plan including:
Submit elevation drawings of each proposed façade that include the following:
All projects must submit proposed floor plans and roof plan, which must:
The following details of construction are required:
Complete the required application and submit it, along with any supporting materials, by email to firstname.lastname@example.org. Your submission should include two attachments:
File size should not exceed more than 25 MB combined. Contact us if you are having trouble with your electronic submission.
Every project is different. Depending upon the complexity and specifics of your project, process and time frame may vary from the information presented on this website and in the application materials. If you have any questions, please contact us.
NOTE: All materials submitted with your application become the property the City and County of Denver. The materials are part of public record, can be used in a public hearing, and cannot be returned.
The Landmark Preservation Commission reviews all proposed accessory dwelling units on individual landmark properties and properties in historic districts.
LPC review will result in approval, approval with conditions, continuance or denial.
Projects that are approved with conditions must submit the requested adjustments to the final construction drawings to landmark staff before a certificate of appropriateness will be issued.
Projects that are continued must provide additional information as requested by the LPC, and must return to the LPC for approval.
Projects that are denied must go before the LPC again with a revised submittal that addresses the LPC's comments.
Once the ADU has been approved by LPC, landmark staff will issue a certificate of appropriateness and stamp the drawings.
The certificate of appropriateness and stamped drawings must be included with plans and materials submitted to Development Services when applying for building or zoning permits. If drawings submitted for a building permit vary in any way from the stamped drawings issued by Landmark staff, the permit drawings will need to be revised or the Landmark stamped drawings will need to be revised. If drawings submitted for a building permit vary substantially from drawings approved by staff or LPC, the project may need to return to the LPC for approval. During the inspections process, the completed project must match the work shown on the Landmark-approved stamped drawings.
Please coordinate with landmark staff on any changes.