Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Alum Rock
If you’re planning a remodel, addition, or ADU in Alum Rock, you need a contractor who understands this unincorporated pocket of east San Jose and its split jurisdiction rules. A kitchen remodel here typically runs $14,000 – $45,000, while an ADU project usually lands between $90,000 and $220,000 depending on hillside grading and septic work. Brookside Contractors does the homework before quoting, so you don’t get surprised mid-project. Call (833) 725-3508 to schedule a free estimate.
Alum Rock is different from flatland San Jose. The lots step up toward the Diablo Range, the soil expands and shifts, and the permitting authority changes depending on which side of the street your parcel sits. Getting those details right before the first shovel hits the ground is what keeps a project moving. That’s the work we do every day here.
Why Brookside Contractors Is Alum Rock’s Preferred General Contractor Company
Our General Contractor team has spent years working the hillside parcels and mid-century ranch homes that define this area. Homeowners in Alum Rock call us because we already know the big question before they ask it: is this lot in Santa Clara County jurisdiction or City of San Jose jurisdiction? A permit filed with the wrong agency can stall a project for weeks. We verify that before we ever put a number in front of you.
We’re led by Nate Burrell, who’s built his reputation on taking messy, complicated projects and sequencing them so they finish on schedule. That matters on a sloped acreage lot where grading, foundation, and drainage have to happen in the right order during the dry season. Nate’s local experience shows in how we scope jobs and in how we price them.
Alum Rock homeowners also value that we don’t push a single brand or supplier. We work with Belgard and Unilock for hardscaping, ActiveYards and Bufftech for fencing, and we match the material to the project rather than the other way around. That’s what “built to your spec” means in practice.
Styles & brands we work with







Licensed General Contractor in Alum Rock
A Licensed General Contractor in Alum Rock handles the structural, permitting, and trade work for projects that most homeowners can’t legally or safely manage themselves: additions, ADUs, garage conversions, and whole-home remodels. In this unincorporated area, the license also carries a practical skill: knowing whether your parcel’s permits come from Santa Clara County or the City of San Jose. Get that wrong and you’re refiling paperwork while your project sits idle.
Permit Verification Before Pricing
We confirm the governing jurisdiction for your parcel before we quote. Alum Rock is a checkerboard where one side of the street can be county and the other city. That affects permit fees, inspection schedules, and which code requirements apply to your garage conversion or home addition.
Structural and Site Work
Hillside lots in the 95127 ZIP require soil reports and, often, engineered retaining or drainage solutions. We scope those costs up front, so your budget reflects the real site conditions, not a flat-lot assumption that falls apart after the first storm.
Residential General Contractor in Alum Rock
A Residential General Contractor in Alum Rock manages the day-to-day reality of building on lots that flatland contractors don’t understand. A home addition here costs $45,000 – $130,000 and a garage conversion runs $30,000 – $80,000. Both numbers move based on slope, drainage, and what unpermitted work from previous owners needs to be corrected.
Expansive Soil and Foundations
Many Alum Rock homes sit on expansive soil that shifts with moisture. We read the geotech report, account for it in the foundation spec, and schedule the work during the dry months when the ground is stable enough to grade.
Legalizing Prior Work
Older ranch homes along Alum Rock Avenue often have unpermitted additions or converted garages. Before we build new square footage, we help bring the existing structure into compliance with the correct agency so your final inspection covers the whole property.
Trusted Brands We Service in Alum Rock
We don’t hand you a default spec. We sit down with you and pick from brands that fit your budget and your hillside conditions. For hardscaping and outdoor living, we commonly work with Belgard and Unilock, which hold up well on sloped, draining lots. For fencing around acreage and along property lines, Bufftech and ActiveYards offer solid value without constant upkeep. Because these materials are familiar to us, we order them correctly the first time and stage them for narrow hillside roads. Your project, your brands, from foundation to finish.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Alum Rock Homes
- Wrong agency permit filing. A contractor files with the City of San Jose, but the parcel is unincorporated Santa Clara County. The permit bounces, and the project loses weeks before anyone even breaks ground.
- Expansive soil cracking foundations. Builders ignore the soil report, pour on a shifting hillside, and the first rainy season opens hairline cracks that become expensive repairs.
- Unpermitted prior work discovered mid-project. The framing is open, the inspector visits, and now the old garage conversion has to be brought up to code before the new addition passes.
- Flat-lot pricing on a sloped site. The quote assumes easy equipment access and short hauls. The real job needs a longer materials route, retaining work, and drainage controls that double the site-prep cost.
Pricing for General Contractor in Alum Rock, CA
Here are the market ranges we see for the three project types Alum Rock homeowners ask about most. These reflect current local labor and material costs, including hillside site work where applicable:
| Project Type | Typical Range in Alum Rock |
|---|---|
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Home Addition | $45,000 – $130,000 |
ADU costs swing most on septic and well setbacks, which are common on the larger unincorporated lots. Garage conversions shift with the amount of legalizing work the existing structure needs. Home additions track slope, foundation engineering, and material haul distance. We scope all of that before you see a number, and we hold the price once the scope is agreed. Call (833) 725-3508 to schedule your free estimate.
We Also Serve Cities Near Alum Rock
We work throughout Alum Rock and the surrounding east side communities. Reach out if you’re in East Foothills, San Jose, Seven Trees, or Buena Vista and planning a remodel, addition, or ADU. One contractor, every phase, across the whole area.
Serving Alum Rock, CA — Our Local Coverage Area
We’re based in the Alum Rock area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About General Contractor in Alum Rock
We look up the parcel’s APN and check it against both agencies’ boundary maps. It’s a step we take before quoting because unincorporated Alum Rock parcels often share streets with city parcels. Call (833) 725-3508 and we’ll verify yours during the estimate.
Hillside lots require soil reports, engineered drainage, and sequencing that respects the dry season between November and April. We order the geotech early, plan for French drains and retaining work, and schedule heavy grading for summer months. That keeps your foundation stable and your permit moving. Call (833) 725-3508 to talk through your site.
Yes, with the right setbacks and county approval. Septic system distance requirements and well placement determine where the ADU can sit, and we account for those before finalizing the design. Call (833) 725-3508 and we’ll review your parcel’s constraints directly.
We stage materials at accessible points and use equipment sized for tight switchbacks and narrow drive approaches. It changes logistics and sometimes price, but we plan for it before the quote, not after the job starts. Call (833) 725-3508 for a site-specific estimate.
You need the governing agency’s building permit, plus electrical, plumbing, and possibly grading permits depending on scope. We pull the permits with the correct agency, schedule inspections in sequence, and stay on site through final sign-off. Call (833) 725-3508 to get the process started.
Written by Nate Burrell, Owner at Brookside Contractors, serving Alum Rock and the surrounding east side communities.