ADU Contractors near Longmont, CO
Sunward Steel Buildings
6800 E. Hampden Ave., Denver, CO 80224
37.1 miles
Sunward Steel Buildings offers pre-engineered steel accessory dwelling units (ADUs), including granny flats and in-law suites. As a direct manufacturer, they provide customizable, code-compliant, affordable backyard cottage solutions across North ... read more
Prospect 30 Eight Construction Inc
2944 Routt Circle, Lakewood, CO 80215
35.8 miles
Prospect 30 Eight Construction proudly offers its high-quality building services to the charming community of Littleton. Known for its unique blend of suburban tranquility and easy access to metropolitan conveniences, Littleton is the ideal settin... read more
Verified Builders
1660 Lafayette Street, Denver, CO 80218
30 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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AAA Home Improvements
10701 West Morrison Road, Lakewood, CO 80227
34.7 miles
AAA Home Improvements is a Denver ADU contractor building detached, garage conversion, basement, above-garage, and attached ADUs across the Front Range. They manage design, permitting, and construction for homeowners seeking rental income, multige... read more
Alpine ADU
6145 Broadway, Denver, CO 80216
25.6 miles
Alpine ADU builds custom & prefab ADUs, garage conversions, and tiny homes across Greater Denver, Boulder, Fort Collins & Colorado Springs. Services include design, permits, and full construction management on Colorado's Front Range.
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5 Rings Construction
12446 Tomahawk Rd, Parker, CO 80138
48.4 miles
Vertical Contracting - Detached Garage Builders
516 South Xenon Court, Lakewood, CO 80228
32.1 miles
Vertical Contracting is a licensed full-service construction & remodeling company offering garage builds, ADU conversions, interior remodeling, pergolas, and flatwork. Known for quality craftsmanship and client-focused service.
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Denver ADU Builders
970 S Clayton Way, Denver, CO 80209
33.4 miles
Denver ADU Builders helps Denver homeowners plan and build ADUs. Services cover permits, design, and construction. Rental income potential ranges from $2,220–$7,000/month. 40+ years of local building experience.
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Custom ADU Builders LLC
6564 West Atlantic Avenue, Lakewood, CO 80227
33.8 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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Kalin Construction
201 Columbine Street, Denver, CO 80206
31.9 miles
As experienced ADU builders in Denver, Kalin Construction has helped numerous homeowners bring their visions for their homes to life. They'll listen to your wants and needs for the project, then craft an ADU that checks all of your boxes. Whether ... read more
Koeppen Construction
7845 Lookout Road, Longmont, CO 80503
7.6 miles
Koeppen Construction builds Accessory Dwelling Units (ADUs) in Longmont, CO, and nearby areas. Services include detached, attached, and garage conversion ADUs for rental, multigenerational living, or guest use. Permitting assistance included.
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Rocky Mountain ADUs
Loveland, CO 80435
15.9 miles
Rocky Mountain ADUs is a Denver-based, family-owned ADU builder offering full-service design, permitting & construction. They provide studio, 1-, 2-, 3-bedroom & loft ADU floor plans, supporting rental income & multi-generational living.
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Revo Renovations LLC
2135 South High Street, Denver, CO 80210
34.7 miles
Denver homeowners can boost property value and earn rental income by building an ADU. 5280ADU, a division of Revo Renovations, offers full-service ADU construction, garage conversions, remodels, and more across Denver County.
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Easthope Design
Oro Valley, Fort Collins, CO 85755
28 miles
Easthope Design is a Fort Collins ADU design firm led by architect Richard Esteb. Specializing in custom ADUs, garage conversions & granny flats across Northern Colorado, they handle design, permits, zoning & construction supervision.
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AAA Home Improvements, Inc.
10701 West Morrison Road, Lakewood, CO 80227
34.7 miles
AAA Home Improvements is a Denver ADU contractor building detached ADUs, garage conversions, basement units & in-law suites across the Front Range. They manage design, permitting & construction for homeowners in Denver, Lakewood, Arvada &a... read more
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What you need to know
ADU Contractors in Longmont, Colorado: Your Guide to Accessory Dwelling Units
If you're considering adding an accessory dwelling unit (ADU) to your property in Longmont, Colorado, you're making a smart investment. With Longmont's growing population and increasing housing demand along the Front Range, ADUs have become one of the most popular ways to maximize property value, generate rental income, or create space for multigenerational living. Finding the right ADU contractor in Longmont is the critical first step toward turning your vision into reality.
Why Build an ADU in Longmont, CO?
Longmont offers a unique blend of small-town charm and proximity to Boulder and Denver, making it a highly desirable place to live. The city has seen consistent growth, and rental demand remains strong. Building an ADU in Longmont allows homeowners to:
- Generate passive rental income in a competitive rental market
- House family members while maintaining privacy
- Increase overall property value significantly
- Contribute to Longmont's affordable housing solutions
- Utilize underused backyard or garage space efficiently
Longmont ADU Regulations and Zoning Requirements
Before breaking ground, it's essential to understand Longmont's ADU regulations. The City of Longmont permits ADUs in most residential zones, but there are specific rules that experienced ADU contractors in Longmont must navigate carefully. Key regulations include:
- Owner-occupancy requirements: In many zones, the property owner must occupy either the primary residence or the ADU.
- Size limitations: Detached ADUs are generally limited in square footage relative to the primary dwelling, typically not exceeding 1,000 square feet.
- Setback requirements: ADUs must comply with specific setback rules from property lines, which vary by zone designation.
- Parking requirements: Additional off-street parking may be required depending on the ADU type and location.
- Design standards: ADUs must be architecturally compatible with the primary structure and surrounding neighborhood.
A knowledgeable Longmont ADU contractor will be familiar with the city's permitting process through the Longmont Building and Safety Division, ensuring your project meets all local codes and avoids costly delays.
Types of ADUs Built in Longmont
Skilled ADU builders in Longmont, CO can construct several types of accessory dwelling units to suit your property and goals. The most common types include detached ADUs (standalone backyard cottages), attached ADUs (additions connected to the main home), garage conversions, and basement ADUs. Each type comes with its own set of construction considerations, costs, and permitting requirements.
Choosing the Right ADU Contractor in Longmont
When selecting an ADU contractor in Longmont, Colorado, look for professionals with proven local experience, proper licensing, and a strong portfolio of completed ADU projects in the area. The best contractors will guide you through design, permitting, construction, and final inspection — delivering a high-quality ADU that complies with all Longmont municipal codes and maximizes your investment.