BAY AREA ADU & ADDITION BUILDER · CA LIC. #1150191
Detached ADUs, additions, and garage conversions - designed, permitted, and built by one licensed crew. More room for family, or a legal rental unit that pays for itself. You approve the plan and price before we start.
ADU & HOME ADDITION BUILDS, HANDLED START TO FINISH
160+ reviews
4.9/5
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What Makes Be James Team Your Go-To ADU & Addition Builder
- We Handle Every Permit — So Code Compliance Is Never Your Problem.
- You Get Weekly Updates — Always Know Exactly Where the Project Stands.
- Every Change Is Written Down — No Surprise Costs Mid-Project.
- We Photograph Every Wall Before We Close It — Proof, Not Promises.
- We Clean Up Every Day — Your Home Stays Livable, Start to Finish.
You're covered. We’re licensed (CA Lic. #1150191), bonded and insured experts.
LICENSED, BONDED, INSURED
Proof of Process: Artifacts beat adjectives
You shouldn’t have to “hope” a contractor is organized—you should be able to see it.
Weekly Update +
- Completed tasks
- Next steps
- Decisions needed
- Risk tracking
Change Order +
- Reason & Description
- Cost breakdown
- Schedule impact
- Digital approval
Schedule Snapshot +
- Weekly milestones
- Critical path tracking
- Key dependencies
Jobsite Standards +
- Dust & Surface protection
- Access & Safety rules
- Daily clean-up checklist
In-wall Documentation +
- Plumbing & Electrical photos
- Structural reinforcement
- Pre-drywall verification
Proof of Process: Artifacts beat adjectives
You shouldn’t have to “hope” a contractor is organized—you should be able to see it.
Weekly Update
- Completed tasks
- Next steps
- Decisions needed
- Risk tracking
Change Order
- Reason & Description
- Cost breakdown
- Schedule impact
- Digital approval
Schedule Snapshot
- Weekly milestones
- Critical path tracking
- Key dependencies
Jobsite Standards
- Dust & Surface protection
- Access & Safety rules
- Daily clean-up checklist
In-wall Documentation
- Plumbing & Electrical photos
- Structural reinforcement
- Pre-drywall verification
They hired Us. Here’s What They Think
Real feedback. Verified by Google
What We Build
Detached ADUs, additions, and garage conversions - designed and permitted from day one.
- A standalone unit in the backyard, with its own address, entrance, and utilities, built from the ground up.
- A private living space attached to your home, with its own entrance, built for family or a long-term tenant.
- Turn an underused garage into a legal living space, without adding new square footage to the lot.
- A smaller, more affordable unit carved from existing square footage, faster to permit and build than a full ADU.
- New square footage added to your home's existing footprint - a bedroom, office, or family room.
- Add a full second floor without expanding your home's footprint, ideal for tight lots.
Here's What "Done Right" Looks Like
Scope defined upfront. Permits handled. Finished as planned. See for yourself.
Modern Home Expansion
Challenge
Insufficient living area for a growing family's needs.
Solution
Adding a seamless extension that matches the existing architecture.
Outcome
Perfectly integrated new space for living and entertainment.
Added Living Space
Challenge
An underused garage and no private space for guests or long-term rental.
Solution
Converting the existing footprint into a self-contained unit, with design, permits, and construction handled by one team.
Outcome
A private, code-compliant living space ready for family or rental income.
Don't see your project?
Financing — Build Now, Pay Over Time
An ADU or home addition is a major investment, and paying for it all at once isn't always the right move. Financing lets you start now and spread the cost over time.
Spread the Cost
Pay in monthly installments instead of one large payment up front.
Pay in monthly installments instead of one large payment up front.
Sorted Out at Your Estimate
We go over the numbers during the on-site visit, so scope and payment get decided together instead of after.
We go over the numbers during the on-site visit, so scope and payment get decided together instead of after.
No Obligation
Asking about financing costs nothing and does not commit you to anything.
Asking about financing costs nothing and does not commit you to anything.
Start the Permit Clock Now
Permit review alone can take weeks. Financing lets you start the process now instead of waiting to save up first.
Permit review alone can take weeks. Financing lets you start the process now instead of waiting to save up first.
Your ADU & Addition Project in 4 Steps
STEP 1 — Tell Us About Your Project
Fill out the quick form with what you have in mind. We'll reach out to set up a visit.
Fill out the quick form with what you have in mind. We'll reach out to set up a visit.
STEP 2 — We Walk the Property and Check the Numbers
We assess the site, zoning, and structural basics — setbacks, utilities, access — before anything is priced.
We assess the site, zoning, and structural basics — setbacks, utilities, access — before anything is priced.
STEP 3 — You Get a Written Scope and Permitting Path
A detailed breakdown of design, permitting timeline, and cost — before anything starts. The price you approve is the price you pay.
A detailed breakdown of design, permitting timeline, and cost — before anything starts. The price you approve is the price you pay.
STEP 4 — We Build It
One crew, permits handled, weekly updates throughout. Backed by a 1-year work guarantee.
One crew, permits handled, weekly updates throughout. Backed by a 1-year work guarantee.
What Homeowners Usually Ask Us
Common Questions, Straight Answers
How do I get started?
Fill out the quick form and tell us what you have in mind. We'll follow up to set up a time to come out, walk the property, and go over zoning and permit basics for your project.
Do you handle permits and zoning for ADUs and additions?
Yes — permits and zoning are handled start to finish, not left for you to sort out. That includes setback requirements, ADU-specific permit tracks, and code compliance for the finished structure.
Is the on-site estimate free?
Yes. We come out, walk the property, and review the site at no cost. You get a written estimate with scope, permitting path, and timeline before anything starts.
Will I know the price before the work starts?
Yes — you get a detailed written estimate up front. If anything changes once permits are finalized or the project is underway, we confirm with you first. The price you approve is the price you pay.
Can I use my ADU as a rental unit?
In most cases, yes — California allows ADUs to be rented separately from the main home. We'll walk you through what your specific lot and zoning allow during the site visit.
Can I live in my home during an addition or ADU build?
In most cases, yes. Detached ADUs and garage conversions typically don't disrupt the main house. Attached additions involve more overlap with your living space — we'll walk you through what to expect for your specific project.
Will you really show up on time?
Yes. We keep you posted on scheduling throughout the project, and any changes are communicated in advance, not discovered on-site.
Do you offer a warranty?
Yes — every job is backed by a 1-year work guarantee. If something we did fails, one call and we come back and fix it free.
Ready to Start Your ADU or Addition?
We serve Bay Area California
Contact us
Request a Free On-Site Estimate