ADU Builders in the Bay Area.
Custom ADU design and construction for homeowners who want a natural, beautifully crafted extension of home—not a generic backyard box.
A better way to add room to your life.
Feldman Construction is a team of experienced ADU builders in the Bay Area, providing custom accessory dwelling unit design and construction for homeowners throughout Santa Clara County, San Mateo County, and surrounding communities.
From detached backyard ADUs and attached units to garage conversions, we manage the project from initial planning and design through permitting, construction, inspections, and final completion.
15+
years of Bay Area experience
01
coordinated design-build team
360°
care from plan to walkthrough
1 yr
labor service warranty
Everything connected. Nothing lost in the handoff.
Property conditions, local requirements, design decisions, utilities, and inspections all influence the project. Your path should account for the whole picture.
01
Feasibility & site planning
We begin with your goals, available space, existing structures, access, utilities, and the site conditions that shape a thoughtful ADU.
02
Custom ADU design
Layouts are developed around privacy, circulation, natural light, functionality, and the way the new unit relates to your home.
03
Permitting & approvals
Plans, documentation, permitting, and required approvals are coordinated as part of one connected project process.
04
Construction & inspections
From site prep and structure through finishes and final walkthrough, your project stays under one experienced team.
An ADU should feel like it always belonged.
Most private
Detached ADUs
A standalone residential structure that gives family, guests, or permitted residential uses a little more independence.
Natural extension
Attached ADUs
An independent living area connected to the primary residence, planned to feel at home with the existing architecture.
Make more of what exists
Garage conversions
A garage may offer a path to permitted living space. We start by evaluating the structure, utilities, regulations, and your goals.
For homeowners seeking more than a standard plan, we build custom ADUs around the property’s architecture, available space, intended use, and finish level.
Clear at every step.
The details change from property to property. Your point of contact does not.
01
Initial consultation
We discuss your property, intended use, design preferences, and project priorities.
02
Property & feasibility review
We identify important site, access, utility, design, and regulatory considerations.
03
Design & planning
Layout, functionality, architecture, materials, and construction requirements take shape.
04
Permitting & pre-construction
Approvals move forward while construction planning and coordination continue.
05
ADU construction
Our team manages trades, scheduling, quality control, and homeowner communication.
06
Inspections & final walkthrough
Required inspections, final details, and a clear handoff bring the project home.
More room for the life you’re already living.
An ADU can add flexible, independent living space without asking you to leave the property you already value.
- Private living space for parents or extended family
- A dedicated guest suite or creative environment
- Greater flexibility as household needs change
- Potential rental use where permitted
- Long-term improvement to the functionality of the property
The right ADU strategy depends on the individual property, intended use, design, and local requirements—not blanket promises.
Local knowledge. No blanket claims.
California establishes statewide standards for accessory dwelling units, while local jurisdictions administer permitting and may apply requirements that affect a specific property or project.
We help coordinate planning, design, permitting, and construction so the project is approached as one connected process. Site-specific feasibility, applicable codes, utility conditions, and jurisdictional requirements should be reviewed before final design decisions are made.
Serving the South Bay & Peninsula
Craftsmanship is the confidence you feel later.
15+ years
Bay Area construction experience
More than 15 years of home remodeling and construction experience in the Bay Area.
Licensed & insured
One accountable team
California contractor license #1090391, with planning, design coordination, and construction together.
One-year warranty
Quality that stays with you
Labor is backed by a one-year service warranty, with communication throughout the project.
Start with what you need to know.
Every property is different. A conversation makes the next step clearer.
ADU feasibility depends on the property, existing structures, proposed ADU type, site conditions, utilities, and applicable state and local requirements. A property and feasibility review is the right first step before major design decisions are made.
Timelines vary based on design complexity, permitting, site conditions, utility requirements, material selections, inspections, and construction scope. A custom ADU should be evaluated individually rather than relying on a universal timeline.
ADU projects generally require permits and must comply with applicable state and local requirements. The specific approvals depend on the property, jurisdiction, and scope of work.
Feldman Construction provides a coordinated approach to planning, design, permitting, and construction so homeowners can move through the project with one experienced construction team.
A garage conversion may be possible depending on the existing structure, property conditions, utilities, applicable regulations, and project requirements. The garage should be evaluated before deciding whether conversion is the right approach.
Yes. Feldman Construction builds custom ADUs around the property, available space, intended use, architectural character, and homeowner priorities rather than relying only on standardized layouts.
Let’s make room for what’s next.
Tell us about your property, intended use, and goals. We’ll talk through the next step for your Bay Area ADU project.
- A thoughtful first conversation, no pressure.
Ready to talk about your ADU?
Whether you have a clear vision or are just starting to explore what’s possible on your property, a conversation is the best first step.
