Attached ADU near Thornton, CO
NAGY Design
2255 Sheridan Blvd. Unit C270, Edgewater, CO 80214
13.1 miles
NAGY Design built a standout 2,200 sq ft detached ADU in Denver's Sloan's Lake, nominated for Best ADU 2022. Costs range $100K–$300K. Their full-service process covers planning, permits, and construction oversight.
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A2Z Builders
501 South Lipan Street, Denver, CO 80223
15.1 miles
A2Z Builders is a Denver-based, family-owned Class A General Contractor with 16+ years of experience. They specialize in ADU construction, custom home builds, kitchen, bathroom, and basement remodeling across the Denver metro area.
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Denver Dream Builders
2339 East 5th Avenue, Denver, CO 80206
12.8 miles
Colorado general contractor since 2005, offering ADU builds, kitchen remodels, bathroom renovations, basement finishing, roofing, and new home construction. Free consultation, no upfront payment, licensed and insured.
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WestIron Construction
8060 Meade Street, Superior, CO 80031
7.2 miles
Studio Home by Studio Shed
1500 Cherry Street, Louisville, CO 80027
10 miles
Studio Home by Studio Shed offers custom & prefab ADUs across Texas, including San Antonio, Austin, Dallas & Houston. Units range from studios to full living spaces. Permit costs vary: Dallas $3K–$8K, Houston $2.5K–$7.5K.
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Murphey's Hammer LLC
Greenwood Village, CO 80112
21.7 miles
Murphey's Hammer is a Denver-based contractor specializing in ADUs, home additions, garage builds & outdoor living spaces. Serving Denver Metro, Aurora, Littleton & more with personalized, quality craftsmanship.
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Custom ADU Builders LLC
6564 West Atlantic Avenue, Lakewood, CO 80227
19.5 miles
Custom ADU Builders, LLC is Denver's trusted ADU contractor offering detached ADUs, garage conversions, and home remodeling. Serving Aurora, Lakewood & more with transparent pricing and expert permitting support.
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River North Basement Company
3629 Jason Street, Denver, CO 80211
10.9 miles
River North Basement Company is a Denver ADU contractor offering construction and remodeling services for accessory dwelling units, including rental units, in-law suites, and guest spaces, ensuring code compliance throughout.
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L&D Construction
5151 Bannock Street, Denver, CO 80216
9.4 miles
L&D Construction builds ADUs across Denver, including detached units, garage conversions, and attached living spaces. Projects focus on multigenerational living, rental income, and accessibility, serving neighborhoods citywide with zoning-compliant, adaptable designs.
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ModernSpace ADU Construction Team Parker
10015 South Parker Road, Parker, CO 80134
27.4 miles
ModernSpace ADU Construction is a trusted ADU builder in Corona with 20+ years of experience. They offer detached ADUs, garage conversions, JADUs, attached additions, and full design services including permits and 3D renderings.
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TinyMod
8150 Gray Fox Dr, Evergreen, CO 80439
28.6 miles
TinyMod (TMOD™) is an offsite development partner offering feasibility analysis, project management, and factory coordination for builders. Services support ADUs, modular communities, BFR, and missing middle housing with up to 60% faster build times.
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Verified Builders
1660 Lafayette Street, Denver, CO 80218
12.4 miles
Verified Builders is a licensed Denver remodeling company offering ADU construction, kitchen & bathroom remodeling, basement finishing, and custom home builds. Serving Denver, Littleton, Aurora & more since 2016.
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Little Home Builder
12509 Lk Pt Ct, Longmont, CO CO 80504
18.2 miles
Little Home Builder is Colorado's dedicated ADU contractor, specializing in stick-built detached ADUs, garage conversions & studios. Full-service from zoning to warranty. Build time: 4–8 months. Financing options available.
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DL Engineering Inc.
9100 West Jewell Avenue, Lakewood, CO 80232
17.8 miles
Denver ADUs (granny flats, garage conversions, in-law units) offer affordable housing density solutions. DL Engineering Inc. provides structural engineering, design, and permitting services for Denver accessory dwelling unit projects.
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Sustainable Design Build
99 Inca Street, Denver, CO 80223
14.2 miles
Sustainable Design Build is Denver's premier ADU builder and contractor, using design-build for accessory dwelling units, garage conversions, in-law suites, backyard cottages, granny flats, and detached ADUs. Benefits: single contract, faster timelines, cost efficiency, fixed pricing. Experts in local zoning since 2017.
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What you need to know
Searching for top Attached ADU ADU Contractors in Thornton, Colorado? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Attached ADU ADU Contractor in Thornton ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Attached ADU professionals can guide you through every step.
Thornton homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Attached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Attached ADU ADU Contractors in Thornton, Colorado, and get started today.