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Home addition roof framing tied into an existing house in San Jose

Structural Work

Home Additions

More square footage, added properly — foundation, framing and roof tied into what's already there, so the new part and the old part behave like one house.

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  • Licensed CA General B #1112902
  • Fully Insured
  • Santa Clara & San Mateo Counties
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The hard part is the seam

Anyone can frame a box. What separates a good addition from a bad one is where it meets the existing house: how the new foundation ties to the old one, how the roof lines meet without creating a leak, whether the existing structure can actually carry what you're adding.

That's structural work, and it's why an addition belongs with a builder rather than a remodeler. We open it up, find out what's really there, and tell you early — old houses are full of surprises, and the honest move is to show them to you rather than absorb them quietly and hope.

Scope

What an addition involves

Structural assessment

What the existing framing and foundation can carry, and what has to be reinforced before anything is added.

Permits & engineering

Additions almost always require engineering and plan check. We carry the submittal and the corrections.

Foundation

New foundation properly tied to the existing one, so the two don't move independently.

Framing & roof tie-in

Framing, and the roof connection — the single most common place a bad addition leaks years later.

Systems extension

Electrical, plumbing and HVAC extended into the new space, including whether the existing panel and equipment can carry it.

Finish to match

Interior and exterior finished so the addition reads as part of the house, not as an obvious bolt-on.

Common Questions

Straight answers

Will my electrical panel handle an addition?
Often not — and it's better to find out at proposal than at inspection. We check panel capacity as part of pricing. A service upgrade is a real line item and we'd rather show it to you early than surprise you with it mid-build.
Can I live in the house during an addition?
Usually yes, though it depends on the scope and where the work meets the living space. We'll be straight with you about which weeks are genuinely disruptive so you can plan around them.
Is an addition cheaper than an ADU?
Not automatically. An addition avoids a second utility connection but adds structural tie-in work to an existing building — and existing buildings hide problems. Which one makes sense depends on your lot, your goal and what we find. We'll give you an honest read on a call.
Are you licensed, bonded and insured?
Yes — California General Building (B) license #1112902, a $25,000 contractor bond, and an active workers' compensation policy with The Hartford. Verify the license on the CSLB registry. Certificates of insurance are available on request.
Do you handle the design?
We build your vision — we're not designing the place with you. If you already have plans, we price and build from them. If you need real design work, you need a designer, and we'll say so up front rather than three weeks in.
How do allowances work?
An allowance covers work nobody can honestly price until something is opened up. Those are billed at actual cost, and whatever isn't spent comes off your final invoice. We'd rather show you the unknowns than bury them in a padded fixed price.

Service Area

Where we build

Permit process, plan check and utility requirements change at every city line. Each page covers what's actually true where you're building.

Tell us about your project

Book a 30-minute discovery call and we'll tell you what's realistic — scope, budget and timeline — whether or not we're the right builder for it.

Book a Project Discovery Call Call (408) 597-2733