Y9 Construction

10637 Roselle Street, San Diego, CA 92121 16.7 miles

SL United Construction Inc

1917 La Cresta Road, El Cajon, CA 92021 27.4 miles

The Avalon Comany

3911 N Cordoba Ave Suite 6, Spring Valley, CA 91977 29 miles

Homeowners across the San Diego area looking to expand their living space or create a rental opportunity turn to the trusted San Diego Builders at The Avalon Company. With more than three decades of experience, they specialize in designing and con... read more

Millan Construction | ADU & Remodeling

325 West Washington Street, San Diego, CA 92103 26.6 miles

Millan Construction is a San Diego ADU contractor specializing in ADU construction, home remodeling, kitchen & bathroom renovations, structural repairs, and permit management. Known for honest pricing and quality craftsmanship, they offer free... read more

Lumina Builders Inc.

4901 Morena Boulevard, San Diego, CA 92117 21.4 miles

Free Consultation Turnkey Solutions

Lumina Builders Inc. follows a 5-step remodeling process: consultation, permits, design, construction, and quality check. Serving San Diego, they handle ADUs, garage conversions, and full home remodels with dedicated project management.

Stel Builders

7950 Dunbrook Road, San Diego, CA 92126 16.8 miles

Stel Builders, a San Diego ADU contractor, designs and builds detached, attached, and garage conversion ADUs. This design-build firm handles permitting, zoning, and construction, offering in-law suites, granny flats, and multigenerational layouts ... read more

CSL Quality Construction

659 3rd Avenue, Chula Vista, CA 91910 35.4 miles

CSL Quality Construction is a trusted ADU contractor in San Diego County, offering full-service design, permits, construction, and renovations. ADUs can boost property value by 20–30% and generate rental income.

North County ADU Construction

1010 S COAST HWY 101, Ste 208, Encinitas, CA 92024 9.6 miles

North County ADU Construction is a local ADU contractor serving north San Diego County. They specialize in garage conversions, JADUs, detached ADUs, and prefab installs. With 500+ builds and a 96% satisfaction rate, they handle design, permitting,... read more

Hubbell & Hubbell Architects, Inc.

1970 Sixth Avenue, San Diego, CA 92101 27.8 miles

Accessory Dwelling Units (ADUs) add value and flexibility to California properties. Learn about ADU regulations, design options like garage conversions, and how Hubbell & Hubbell Architects can help you build a compliant granny flat or guest h... read more

SDS Homes

42400 Winchester Road, Temecula, CA 92590 25.5 miles

Licensed Eco-Friendly

SDS Homes Construction is a Temecula, CA design-build contractor specializing in ADUs, granny flats, and Casitas. They offer turnkey services from design to permitting and construction, serving Temecula and Murrieta homeowners.

Groysman Construction

12484 Heatherton Court, San Diego, CA 92128 14 miles

Licensed

Groysman Construction, a San Diego ADU contractor, builds detached units, garage conversions, and JADUs. Learn about CalHFA grants up to $40,000, 2023-2024 SB 897 permitting changes, and typical ADU costs ranging from $165,000 to $385,000.

SJB Construction Inc

9739 Deer Hollow Court, Santee, CA 92071 22.8 miles

Building a granny flat (ADU) in San Diego can boost property value and ease housing needs. Detached ADUs up to 1,200 sq ft start at $250/sq ft. Fee waivers may save homeowners $14,000+. Rules apply regarding zoning, lot use, and size limits.

SOHO Architecture & Construction

527 North Highway 101, Solana Beach, CA 92075 11.1 miles

Eco-Friendly

SOHO Architecture & Construction offers full-service ADU design and build in San Diego, handling permitting, construction, and project management for detached, attached, garage conversion, and Junior ADUs with transparent communication and a w... read more

EHM Construction

3966 Falcon Street, San Diego, CA 92103 27.3 miles

EHM Construction offers ADU design and building services in San Diego, CA. Projects include detached two-story ADUs with roof decks, garages, and scenic views in neighborhoods like Mission Hills and South Park.

Coronado Construction

8250 Camino Santa Fe, San Diego, CA 92121 17.7 miles

Eco-Friendly

Coronado Construction builds Accessory Dwelling Units (ADUs) in San Diego, CA. From garage conversions to detached units, their ADUs boost property value, generate rental income, and offer flexible living using quality, energy-efficient materials.... read more

Other cities in California

What you need to know

ADU Contractors in San Marcos, CA: Building in a Fast-Growing Inland North County City

San Marcos is one of the fastest-growing cities in San Diego County, with a booming population and a strong demand for additional housing. As a city that blends suburban neighborhoods with proximity to California State University San Marcos (CSUSM), there is a particularly high demand for Accessory Dwelling Units (ADUs) to house students, faculty, and multigenerational families. Hiring experienced ADU contractors in San Marcos, CA is essential to navigate the city's specific permitting processes and make the most of your property investment.

San Marcos ADU Regulations and Permitting

ADU projects in San Marcos are governed by both California state ADU law and the City of San Marcos Municipal Code. The city has adopted state guidelines that allow homeowners to build ADUs on single-family and multifamily lots. Key regulations include:

All ADU permits in San Marcos are processed through the City of San Marcos Development Services Department. A qualified local ADU contractor will be familiar with the city's online permitting portal and typical review timelines, which can help avoid costly delays.

What to Look for in San Marcos ADU Contractors

Choosing the right ADU builder in San Marcos means finding a licensed general contractor with proven experience in San Diego County's regulatory environment. The best contractors will handle everything from design and engineering to permit submission and final inspection. Look for contractors who:

Maximize Your San Marcos Property Value with an ADU

With San Marcos home values continuing to rise and rental demand driven by CSUSM and nearby employers in the San Marcos Innovation Corridor, adding an ADU is one of the smartest investments a homeowner can make. Whether you're building a detached backyard cottage, converting a garage, or adding a JADU, working with a skilled ADU contractor in San Marcos, CA ensures your project is completed on time, on budget, and fully up to code.

ADU Contractors near San Marcos, CA