Directory · Denver metro
Who builds ADUs in Denver
Companies active in ADU construction across the Denver metro. Listings are free and factual; no company pays to appear here. Verification of license, insurance, and references is in progress company by company, verified listings are marked when complete. See the methodology for how listing and verification work.
LAST UPDATED: AUGUST 2026 · LISTINGS ARE ALPHABETICAL
Which kind of builder fits your project
Want all builders side by side? See the comparison table, or which builder type fits your situation. Each listing above links to a factual profile. To narrow the field first: garage conversions (existing-shell specialists), basement ADUs (basement and underpinning specialists), prefab vs. site-built (modular and prefab builders vs. custom firms), and rules by neighborhood (which jurisdictions a builder has actually permitted in).
ADU 5280 / Revo Renovations
ADU-focused design-build work in the Denver metro.
adu5280.com
Arch Design & Build
Arch Design & Build, Inc. Lists ADU construction, garage conversions, basement finishing and home additions among its services. City of Centennial contractor license CL-005942-2025, Issued on public record, checked September 28, 2026.
arch-db.com
Custom ADU Builders
Custom accessory dwelling unit projects in the Denver area.
customadu.co
ELMNTL
Elemental Labs Inc. Factory-built modular cabins, homes and ADUs, as the company states. Colorado factory-built structures registration FB Factory ID 005185, Active on public record, checked September 28, 2026.
elmntl.io
Little Home Builder
ADU specialist publishing Denver permitting guidance; builds across the Front Range.
littlehomebuilder.com
River North Basement Company
Basement finishing and basement ADU conversions in Denver.
Sustainable Design Build
Denver design-build firm with ADU and residential projects.
sdb-denver.com
Timberline Building Group
Residential construction including ADU builds in the Denver area.
The featured seat
One builder at a time holds the featured position on Denver ADU Guide. Featuring is paid sponsorship, always labeled, and available only to companies that pass our verification checks, license, insurance, and client references. It never changes the free listings above. Builders: to ask about the seat or correct your listing, contact us.