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Residential Development Management

Build Your Dream ADU with Ease

Experienced Accessory Dwelling Unit Contractors​ Serving the San Francisco Bay Area, CA

At Stone & Stryder, LLC, we are experienced accessory dwelling unit contractors specializing in Owner’s Representation for multifamily accessory dwelling units (ADUs). We support property owners, developers, and investors through every phase of their ADU projects—from feasibility and entitlement to construction and closeout. Whether you’re adding one or several units to an apartment or mixed-use property, our team ensures seamless coordination across design, permitting, and construction.

As trusted ADU contractors in the Bay Area, we stay on top of California’s evolving ADU legislation. Recent laws such as SB 1211 (expanding ADU allowances on multifamily lots), AB 1033 (enabling separate sale of ADUs as condominiums), and AB 2533 (offering amnesty for unpermitted units) create new opportunities for multifamily property owners. Our team leverages deep knowledge of these changes to help you unlock your property’s full potential with streamlined approvals and increased income or affordable housing stock.

Accessory Dwelling Units ADU

Start Your ADU Project Today for Quick Results

Begin your ADU project today and experience a hassle-free construction process. We manage all aspects to ensure your dream ADU becomes a reality without delay.

Our Multifamily ADU Owner’s Rep Services

As seasoned accessory dwelling unit builders, we offer full-service ADU construction services tailored for multifamily developments:

  • Site feasibility and zoning analysis for multifamily parcels
  • Financial modeling and pro forma development
  • Coordination of design and engineering teams
  • Permitting and entitlement management with city agencies
  • Contractor bidding, selection, and contract negotiation
  • Construction oversight, quality assurance, and compliance
  • Cost control, pay application review, and change order management
  • Communication with property management and tenants

We work with only the most experienced ADU contractors to ensure each project meets strict quality and code requirements.

Why Choose Stone & Stryder for Your ADU Project?

With over 120 accessory dwelling units completed and 250+ ADUs successfully permitted, Stone & Stryder is a trusted name in ADU services across the San Francisco Bay Area. Our track record includes:

  • 350+ projects managed
  • $130M+ in total development costs
  • 120 ADUs completed
  • 250+ ADUs approved and permitted
  • In-depth knowledge of AB 1033, SB 1211, and AB 2533

As experienced accessory dwelling unit contractors, we handle every aspect of your ADU project—from feasibility studies and permit procurement to contractor negotiation and construction oversight—so you don’t have to.

Additional Services Include:

  • Acquisition due diligence
  • ADU entitlement strategy for multifamily properties
  • Contractor procurement with vetted ADU construction services providers
  • Adaptive project phasing for occupied buildings

If you’re looking to add accessory dwelling units to your multifamily property, trust one of the professional accessory dwelling unit contractors,​ Stone & Stryder’s expert team, to guide your project to success. With our full-scope ADU services, you’ll have a professionally managed project that meets your investment goals and delivers long-term value.