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Home addition contractors in Denver

The 10 home addition contractors from Google's results for Denver, Colorado, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.

Last updated

Bump-out
$26,000 – $62,000small single-room extension
Room addition
$82,500 – $206,000ground floor, finished
Second-story addition
$154,500 – $412,000whole or partial floor
Denver vs US
+3%around the US median

Licensing in Colorado. Colorado has no state license for general contractors or remodelers. Denver and most other cities license contractors locally.

Number 1: Cillessen Construction

5.0(117)out of 5, from 117 reviewson GoogleWheat Ridge, CO

Cillessen Construction remodels and builds homes across the Denver Front Range from Wheat Ridge. The team takes on additions, whole-home renovations, custom homes and exterior work, with a focus on large-scale remodels.

(303) 305-7001 12300 W 49th Pl #2, Wheat Ridge, CO 80033

Number 2: Denver Metro Renovations

5.0(62)out of 5, from 62 reviewson GoogleDenver

Denver Metro Home Renovations remodels kitchens and bathrooms for homeowners in Denver and the surrounding metro area. The company also takes on roofing and other renovation projects for existing houses.

(720) 675-7411

Number 3: Denver Home Additions and Pop Tops

5.0(26)out of 5, from 26 reviewson GoogleDenver, CO

Kalin Construction builds home additions and pop-tops in Denver, Colorado.

(303) 350-7762 201 Columbine St, Denver, CO 80206

Number 4: Denver Home Remodeling Contractors

4.9(40)out of 5, from 40 reviewson GoogleDenver, CO

CO Home Design is a home addition contractor in Denver, Colorado.

(303) 500-0450 1015 E 70th Ave Unit C, Denver, CO 80229

Number 5: Denver Cg

5.0(1)out of 5, from 1 reviewson GoogleDenver, CO

Denver Construction Group is a general contractor working throughout the Denver metro area. It remodels kitchens and bathrooms, finishes basements, builds home additions and takes on new builds and whole-home remodeling.

(720) 343-7240 20 E Colorado Ave, Denver, CO 80210

Number 6: SDB Denver

4.8(32)out of 5, from 32 reviewson GoogleDenver, CO

SDB Denver remodels homes in Denver, including pop-top additions that add a story to the city's single-family houses. Much of its focus is on the one and one-and-a-half story Craftsman homes found in inner neighborhoods.

(720) 667-4876 99 Inca St, Denver, CO 80223

Number 7: Tectonic Builds

4.8(28)out of 5, from 28 reviewson GoogleBoulder, CO

Tectonic Design Build plans and builds home additions in Boulder and Denver, with architects and builders working together in-house. Projects include family rooms, primary suites and home workspaces designed to blend with the existing house.

(720) 466-5495 2434 30th St, Boulder, CO 80301

Number 8: Denver Urban Builders

4.4(9)out of 5, from 9 reviewson GoogleDenver, CO

Denver Urban Builders builds home additions in Denver for homeowners looking to add living space to an existing property. The company works with owners weighing an addition against a move or planning to sell later.

(720) 902-5773 2806 Speer Blvd, Denver, CO 80211

Number 9: Denver Home Additions

4.2(5)out of 5, from 5 reviewson GoogleDenver, CO

RKG Contracting designs and builds home additions in Denver, including kitchen, bathroom, basement, sunroom and dormer additions plus ADUs. The company handles design, construction and project management for residential extensions across Colorado.

(720) 400-1445 575 E 49th Ave, Denver, CO 80216

Number 10: Home Additions

4.3(22)out of 5, from 22 reviewson GoogleLakewood, CO

Working out of Lakewood, KLM Construction builds home additions and other residential projects in the Denver area. Before construction the team studies rooflines, framing, foundation conditions and mechanical tie-ins so the new space reads as part of the original home.

(303) 495-2252 1949 Wadsworth Blvd Ste 101, Lakewood, CO 80214

What home addition contractors charge in Denver

In Denver, a bump-out typically costs $26,000 – $62,000. Remodeling labor in Denver runs about 3% above the US median, which accounts for most of the difference from the same project elsewhere.

How to choose between them

  • Check the license yourself. Where Colorado or Denver licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
  • Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
  • Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
  • Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.

How this list is ordered

These are the firms from Google's results for "home additions denver", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.

Home addition contractors in Denver: common questions

Do I need an architect for a home addition?

Usually yes, or a design-build firm with in-house design. Additions need stamped structural drawings for the permit in most places, and zoning review on setbacks, height and lot coverage.