Home Additions in Federal Heights, CO

Room additions are named directly on Federal Heights’ permit list, no exceptions and no size threshold below which the city treats one as exempt. Our crew plans Federal Heights additions around the plot plan the city asks for, the zoning district the property sits in, and the handful of specific building rules — egress, safety glass, heat, electric service — the city’s own addition guidance spells out.

Room Additions Are Always a Permit

The city’s Building Permit Requirements handout lists “Room Additions” as its own line under projects that require a permit, alongside attached and detached garages and accessory buildings. There is no square-footage floor below which an addition is treated like a repair; any addition goes through the permit process.

The city’s addition-specific guidance calls for a plot plan showing the dimensions of the addition and its relationship to existing buildings and structures on the property, with easements and distances to property lines drawn to scale, plus floor plans drawn to scale and a completed building permit application. We build that plot plan early, because it is the document that determines whether the addition as drawn fits the lot before a foundation is ever dug.

Zoning District Sets the Plot Plan You File

Federal Heights zones residential property into five districts: R-1 (Single Family Residential), R-2 (Duplex Residential), R-3 (Multi-Family Residential), R-4 (Mobile Home Park), and R-5 (Single Family Mobile Home). The city publishes separate plot-plan templates for R-1 corner lots, R-1 interior lots, R-5 corner lots, and R-5 interior lots, which is the clearest signal that setback compliance is demonstrated lot-by-lot against the applicable district’s plot-plan format rather than a single citywide number.

We were not able to confirm exact front, rear, and side-yard setback distances, maximum lot coverage, or maximum structure height for these districts from an official source in a form we could verify directly — the full zoning ordinance text is served through the city’s Municode library in a format this research pass could not extract cleanly. We do not publish specific setback numbers here as a result. Before finalizing an addition’s footprint, we confirm the property’s zoning district and its exact dimensional standards directly with the Federal Heights Building Department or Planning staff, and we recommend every homeowner do the same rather than relying on a general figure from another jurisdiction.

Egress, Safety Glass, and Heat

The city’s addition guidance is direct on a few points that shape how an addition connects to the existing house. First: “Additions not to enclose bedroom or basement egress windows” — a common mistake when a new room gets built against the back of a house without checking what the existing egress window below or beside it needs to keep working. Second, safety glass is required at specific locations near new openings; new windows and doors get flagged on the plan so the reviewer can identify which ones need tempered glazing. Third, “Heat is required in all habitable rooms”, so the addition’s heating source has to be shown on the plan rather than left as a later decision.

We check the existing house’s egress windows against the addition’s footprint before finalizing a design, and we plan the heating source, whether it extends the existing system or adds a dedicated unit, as part of the same drawing set that goes in for permit.

Electric Service and Foundation Notes

An addition often adds enough load that the existing electric service needs attention. City guidance notes that “Existing electric service may require an upgrade or relocation” and asks that the size of the electric service, meaning the rating shown on the main breaker, be indicated on the plan so the reviewer can flag whether an upgrade is needed before construction starts. As with other electrical work, permitting for any service change runs through the State of Colorado Department of Regulatory Agencies (DORA), which administers all electrical permits and inspections for Federal Heights, separate from the city’s building permit for the addition’s structure.

On foundations, city guidance notes that a crawlspace needs at least 18 inches of clearance between the bottom of the floor joists and grade, and at least 12 inches under a beam, with crawlspace access at least 18 by 24 inches and unobstructed. Sites with swelling soils may need engineered caissons and a foundation designed by a Colorado-licensed architect or engineer, and a basement addition may require engineered design generally. The guidance also tells applicants to call the state utility-locate line, 811, before finalizing the site plan, so buried electric, gas, sewer, and water lines are marked and the addition is not sited on top of one.

Floodplain Development Permit

Federal Heights maintains a floodplain information page and a separate Application for Permit to Develop in a Floodplain Area, which asks whether the 100-year floodplain and floodway are delineated on the site plan and references the Mile High Flood District and FEMA. This confirms the city runs a floodplain permit process distinct from the building permit, but we could not confirm the exact criteria that trigger it for a residential addition from an official source in this research pass. If a property sits anywhere near a mapped floodplain or drainageway, we raise the floodplain permit question with the city before finalizing the addition’s design, rather than assuming it does not apply.

How We Sequence a Federal Heights Home Addition

We start by confirming the property’s zoning district and pulling the matching plot-plan template, then draw the addition’s footprint, easements, and property-line distances to scale, checking it against the district’s dimensional standards with the city directly. We flag any nearby floodplain mapping and confirm whether a floodplain development permit applies before drawings are finalized.

The design set shows the addition’s heating source, the existing egress windows it must not enclose, window and door locations for a safety-glass check, and the existing electric service size. Once the city permit and any needed DORA electrical filing are issued, foundation work follows the crawlspace and soils guidance above, framing and utility locates come next, and rough inspections are requested by the prior-day 3:30 p.m. cutoff before insulation, drywall, and finish work close out the project.

Common Questions

Does every home addition in Federal Heights need a permit?
Yes. “Room Additions” is listed directly on the city’s required-permit list with no minimum size exemption.

What are the setback requirements for my lot?
Setbacks depend on the zoning district (R-1 through R-5) and are demonstrated on a district-specific plot plan. We were not able to confirm exact setback distances from an official source in this pass, so we confirm them directly with the city for each property before finalizing a design.

Can an addition cover an existing egress window?
No. City guidance states additions are not to enclose bedroom or basement egress windows, so the existing window’s location has to be checked against the new footprint.

Will my addition need an electrical service upgrade?
Possibly. City guidance notes existing electric service may need an upgrade or relocation depending on the addition’s load, and any service work is permitted through the State of Colorado (DORA), separate from the city’s building permit.

Talk to Us About Your Project

Tell us about the addition you’re planning, including its size, location on the lot, and whether it’s near a mapped floodplain. We handle the Federal Heights plot plan, zoning confirmation, permit filings, and inspection scheduling from foundation to final.