Home Additions & High-End Remodelingin Northern California
An addition is two projects wearing one permit: new construction, and stitching it invisibly into a house built decades ago. Rooflines, floor heights, siding, and systems all have to marry up — that's the craft. We build room additions, second stories, and whole-home remodels across the Central Valley.
Licensed & Insured · CSLB #1130548 · 5.0★ on Google, Yelp, Thumbtack & Angi
The Work
Done Right, Documented, and Inspected
If the goal is more house without moving, we'll tell you honestly whether an addition, an ADU, or a reconfiguration of what you have is the better spend.
Every project runs under Sarmento Bros. Construction Inc. — CSLB #1130548, fully insured with general liability and workers' compensation. Based in Manteca, we serve businesses and property owners across the Central Valley, East Bay, and greater Northern California.
What We Handle
- ✓ Room additions and bump-outs
- ✓ Primary suite additions
- ✓ Second-story additions
- ✓ Whole-home remodels
- ✓ Structural work and foundations
- ✓ Matching exteriors, roofs, and finishes
How It Works
A Straightforward Process
01
Walk & Scope
We meet at your space, listen to what you need, and scope the job honestly — including the parts other bids leave out.
02
Fixed Estimate
A written, itemized estimate with a real schedule. Free, and good numbers — not a teaser that grows later.
03
Permits & Build
We handle drawings, permits, and inspections, then build with our own crews and trusted trade partners.
04
Walkthrough & Closeout
Final walkthrough together, punch list closed, documents handed over. Done means done.
Common Questions
Home Additions FAQs
Addition or ADU — which adds more value?+
Depends on the goal. Rental income or multi-generational independence: ADU. More space in the main living envelope: addition. We build both and will run the comparison for your lot honestly.
Can we live in the house during an addition?+
Almost always. The new space builds outside your walls; the disruptive tie-in happens in a planned, compressed window near the end.
Will the addition look 'added on'?+
Not if it's designed right — matching foundations, rooflines, windows, and stucco/siding texture is exactly the detail work we're picky about.