Residential Alterations Guide

This guide page outlines the minimum documentation necessary to allow a permit application for alterations of a new single family dwelling, duplex, triplex or townhome to be taken in for review. Use this guide page if there is no exterior scope of work or if the exterior scope is limited to the replacement of existing doors and windows or installation doors and windows in new opening and replacement of exterior finishes only. Applicants may be required to submit additional information as necessary to clearly demonstrate compliance with all applicable codes. Please be advised that incomplete applications or plans that do not meet the submittal requirements will not be accepted for review.

• Scope of Work Form

• Asbestos Inspection Report (required if disturbing potentially asbestos-containing materials at the following trigger levels):
  • 32 SF of surfaces;
  • 50 linear feet of pipes; or
  • Creating waste equal in volume to a 55-gallon drum
• Plumbing Fixture Count and Irrigation Form (required for all plumbing scopes of work that include the removal, replacement, or addition of plumbing fixtures)
• Stormwater & Flood Management Plant Investment Fee Calculation Form (required for additions of impervious area)
• 2024 City of Boulder Energy Conservation Code (COBECC) Residential Mandatory Measures Checklist
  • Required for all alterations with applicable scopes of work
  • Required for additions less than 1000 sf and Level 1 and 2 alterations
• Energy Rating Index Report (e.g., HERS, required for additions of 1000 sf or more and Level 3 or 4 alterations)
• Heating and Cooling Equipment Sizing (ACCA Manuals, required for any new mechanical heating and/or cooling systems)
• Sustainable Deconstruction Plan (required for Level 4 alterations)
• Site Survey (stamped by a Colorado Licensed Land Surveyor)
• Historic Approval (Historic Preservation Demolition Review required for buildings 50 years of age or older when the work meets the definition of demolition in BRC(1981) 9-16 or Landmark Alteration Certificate required for any building in a historic district and for individual landmarks)
• Floodplain Development Permit (required for structures located in a regulatory floodplain)
• Stream, Wetland and Water Body Permit (required for structures located in a regulatory wetland)
• International Wildland-Urban Interface Code compliance information (required for structures located in the Wildland Urban Interface Zone)
• Copies of Previous Approvals (Notice of Disposition and copies of any city-stamped development review approvals such as Accessory Dwelling Unit, Site Review or Minor Modification)

• Floor Plan(s) showing existing and proposed conditions
• Plan drawings shall be drawn to an identified scale of common use (such as 1/8"=1' or 1/4"=1')
• Provide a graphic scale bar on every page
• A 3" x 3" square shall be provided in the lower right corner of the first sheet for the city's approval stamp
• All sheets shall be the same size (oriented so that north is up) throughout the entire plan set, and of adequate size to clearly convey all information

• Site Plan
• Landscape and Street Tree Plan
• Building Elevations Building Cross Sections at relevant locations
• Wall Section Details
• Structural Drawings (must be stamped by a Colorado Licensed Engineer)