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Building Division

Residential Additions

Residential addition permit submittal requirements

  • Building Permit Application.  If contractors are being used they shall be listed on your application at the time of submittal (Homeowner Agreement Form).
  • View the Residential Review Plan Process.
  • Construction documents.  One set of scaled (¼” = 1’) construction plans on white paper in blue or black ink. Plans shall include:
    • Site plan showing dimensions to property lines and other structures.  NOTE: It shall be the sole responsibility of the property owner and/or permit holder to verify the location of all utilities and easements including water, sewer, well, septic, electric, phone, cable, fiber optic and gas prior to excavation or construction of any structure. 
    • Floor plans (including basement plans), room dimensions and intended use, location and size of all windows and doors.
    • Elevation drawings showing complete construction including all exterior elevations.
    • Cross-section(s) from the foundation to the roof.
    • Typical wall detail(s) from the foundation to the roof showing all components.
    • Engineered foundation plans with each page stamped and signed by a Colorado registered Professional Engineer.
    • In areas that may contain a geological hazard, additional analysis and mitigation by a Colorado registered Geological Engineer may be required.
    • Structural framing plans.
    • All trusses shall be engineered.
  • Residential Energy Compliance.  New residential construction shall comply with one of the following three paths for energy conservation: Prescriptive, Performance or Energy Rating Index (ERI).
  • Heating and cooling. New heating and cooling equipment and appliances shall be sized in accordance with ACCA Manual S, based on building loads calculated in accordance with ACCA Manual J or other approved methodologies.  New duct systems serving HVAC equipment shall be designed and installed in accordance with ACCA Manual D or other approved method.
  • Drainage Erosion and Sediment Control. Complete DESC submittal (DESC Application, Erosion and Sediment Control Drawing, Lot Specific Drainage Plan, and DESC Plan Standard Notes and Details). Any questions related to DESC Plan design requirements, DESC Plan submittal and permitting process, or DESC inspection requirements should be directed to the Douglas County Engineering Services Division 303-660-7490.
  • If  you are on a septic system an approval letter from the Douglas County Health Department is required if you are adding any bedrooms in the addition.
  • Letter from Architectural Control Committee (ACC) (where applicable).  If this letter is not included with your submittal, your permit will be placed “on hold” for 10 working days to allow for the notification of the Architectural Control Committee.