Basement Finishing in Westminster, Colorado

You won’t find a better or faster basement finishing company to complete your new basement or remodeling project in the city of Westminster, Adams County, or Jefferson County.

Basement Finishing in Westminster: What to Know Before You Start

Westminster sits in both Adams County and Jefferson County, with about 116,000 residents (2020 Census). The city grew from under 20,000 people in 1970 to more than 100,000 by 2000, so a large share of its homes date from the 1970s through the 1990s. If a home from those decades still has an unfinished basement, it is usually the biggest block of usable space left in the house: room for a guest suite, a rec room, a home office, a gym or a second living area without changing the footprint of the home.

Permits and inspections in Westminster

A finished basement in Westminster needs a building permit. The City of Westminster Building Division lists basement finishes among the residential projects that require one, and applications go through the city’s online eTRAKiT portal. The city builds to the 2021 International Residential Code with its own local amendments. ElkStone manages the permit and the inspection schedule as part of your project, and our project managers work with the city’s inspectors on every job. Read more in our guide to basement finishing permits in Colorado.

Adding a bedroom? Plan the egress window first

A legal basement bedroom needs an emergency escape opening: in most Colorado jurisdictions that means a window or door with at least 5.7 square feet of net clear opening, a clear opening at least 20 inches wide and 24 inches tall, and a sill no more than 44 inches above the floor. Egress wells, ladders and window sizing are decided during design, before framing starts. Our Colorado egress window guide walks through the rules.

What a Westminster basement costs

Most Colorado basements we finish run $65–$105 per finished square foot, and the final number depends on the size of the space, the number of bathrooms and wet areas, and the finishes you choose. We quote a firm price after your design consultation. Our article on what basement finishing costs in Colorado explains what moves the number.

How long it takes

Our basements take 6–8 weeks on site once we break ground. Design, selections and the permit review happen before that, so the full calendar from first meeting to final walk-through is longer than the build itself. We set the schedule with you before construction starts.

Communities we serve in Westminster

We serve all of Westminster, in both the Adams County and Jefferson County parts of the city. Our finished basements in Westminster span ZIP codes 80020, 80021, 80023, 80031 and 80234 (ElkStone project records, as of October 2026).

Your designer, and where the design happens

Your designer for the northwest metro is Keith Douglas, an ElkStone basement specialist with more than 20 years in residential and commercial construction, who lives in the area and handles design visits from Golden and Arvada to Westminster, Broomfield, Lafayette and Erie. Meet Keith. Your finish selections come together at our Design Studio at 11 Inverness Way South in Englewood: a showroom of cabinets, countertops, tile, flooring, hardware, lighting and plumbing fixtures, where your complimentary one-hour design consultation with our licensed interior decorator, Makenzee Weems, takes place (Monday to Friday, 8 am to 5 pm). Book a Design Studio visit.

Westminster Basement Finishing FAQs

Do I need a permit to finish my basement in Westminster?
Yes. The City of Westminster Building Division requires a building permit for a basement finish, with inspections during the build. ElkStone handles the application and the inspections as part of the project.

How long does a basement finish take in Westminster?
6–8 weeks on site once we break ground. Design, selections and permit review come before that.

What does it cost to finish a basement in Westminster?
Most Colorado basements we finish run $65–$105 per finished square foot. Size, bathrooms and finish level drive the final price, which we confirm in writing after your design consultation.

Can I add a bedroom to my Westminster basement?
Yes, as long as it has a code-compliant egress window or door and meets ceiling-height and smoke-alarm rules. We size and place the egress window during design.

Why does the Westminster permit application ask for my finish selections?
Westminster prices a building permit on the total valuation of the project, adds a plan-review fee of 65% of the permit fee, and collects an estimated city use tax of 4.25% on half of that valuation (City of Westminster building permit fee schedule). The application therefore has to show the full scope of the job, including your finish selections, and the city issues one permit per project rather than one per trade. We prepare that paperwork as part of the project.

Nearby communities we serve: Arvada, Broomfield, Lafayette, Erie, Golden, Lakewood, Thornton. See every Colorado basement finishing area we cover, read what basement finishing costs in Colorado, or request a free estimate.