A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Home Addition Contractor Across Los Banos
A home addition in Los Banos typically costs $180 – $420 per square foot depending on scope, finishes, and whether you’re building out or up. For most single-family lots in Los Banos, a 400-sq-ft room addition lands between $72,000 and $168,000, while a second story addition on an existing 1,200-sq-ft home usually runs $220,000 – $420,000. We’re Benson ADU Fresno, led by Troy Eastman, and our crews serve Los Banos every week. Call (559) 206-2363 for a written price before any work starts.
We know Los Banos. We know the heat, the stucco homes, the big lots off Pacheco Boulevard and San Luis Street. And we know that a home addition here has to be built for 100-degree summers, not for the mild weather an out-of-town designer might assume. That changes the insulation, the roof spec, the window glass, and the HVAC sizing. We plan for all of it from the first conversation.
Why Benson ADU Fresno Is Los Banos’s Preferred Home Addition Contractor
Our team works in Los Banos every month, and homeowners around Miller Road, Pioneer Road, and the neighborhoods near Los Banos Creek recognize our uniformed crews and our process. We hand every customer a written price before a shovel turns. That’s the Home Addition Contractor standard we built our reputation on. No verbal ballpark that drifts upward after demo day.
Troy Eastman leads every project with the same rule: if it’s not in writing, it’s not real. Every Los Banos addition we build comes with a written guarantee and the 365-Day Done Right Promise. If something isn’t right within a full year, we make it right. Homeowners here have told us that’s the main reason they chose us over contractors who hand over a number on a napkin and vanish.
Scheduling from our Fresno, Central Valley office means a live person answers your call around the clock, and our background-checked technicians arrive in uniform. For Los Banos homeowners, that means no phone tag and no waiting until Monday morning when you have a question about your second story framing or a garage conversion timeline.
Second Story Addition Contractor in Los Banos
A Second Story Addition Contractor in Los Banos handles the structural, insulation, and roofing work required to add a full or partial upper floor to an existing single-story home. We see this most often on 1970s-era ranchers off Highway 152 and in the older blocks near downtown, where the lot is too narrow for a horizontal addition but the house has sound footings. In Los Banos, second story additions typically run $220,000 – $420,000, with the spread driven by roofline complexity, stair placement, and whether the existing stucco exterior needs to be re-flashed and re-finished at the new floor line.
Heat-Correct Framing and Insulation
Most stock plans call for 2×4 walls with R-13 fiberglass. We will not spec that in Los Banos. Our second story walls go up as 2×6 with R-23 insulation, and we seal every top plate with foam gaskets so superheated attic air can’t leak into the new bedrooms by mid-morning in July.
Cool-Roof and HVAC Sizing
The new upper floor is the hottest room in the house unless the roof and cooling are planned together. We specify reflective cool-roof shingles and size the mini-split or ducted system for a 40-degree indoor-outdoor delta. That means on a 104-degree day, the unit holds 72 degrees without short-cycling or running all afternoon.
Garage Addition Contractors in Los Banos
Garage Addition Contractors in Los Banos convert an attached or detached garage into livable square footage, or extend an existing garage with a new bedroom, bathroom, or workshop wing. On the big 6,000+ square foot lots common in Los Banos, this usually costs $85,000 – $195,000 for a full garage-to-ADU conversion with kitchen and bath. A smaller bump-out addition to an existing garage runs $45,000 – $90,000. The fixed price depends on whether the slab needs plumbing trenching, whether the existing roof framing is reusable, and how much electrical capacity the panel has left.
Garage Conversions With Yard Left Over
The pattern we see repeatedly in Los Banos: homeowners want rental income or space for aging parents, but they don’t want to sacrifice the backyard where their kids play. Converting the existing two-car garage solves that. The yard stays. The parking moves to the driveway or a carport. The city’s backyard unit rules make this a far simpler path than many homeowners expect.
What Fails on Los Banos Garages
Older composition shingle roofs with nail pops from repeated 105-degree expansion cycles are the first thing we look at. On a 7,200-sq-ft lot off San Luis Street near the Los Banos Creek, our crew converted a two-car garage into a 520-sq-ft ADU. The existing roof had exactly that problem, so we re-roofed with a reflective cool-roof shingle, sealed every top plate, and installed a 1-ton Mitsubishi mini-split. The owner’s first full-summer ADU utility bill ran $18 less per month than a neighbor’s identical footprint built with standard R-13 walls.
Trusted Brands We Service in Los Banos
We build with brands Los Banos homeowners can research independently before they ever call us. For prefab and panelized additions, we work with Abodu, Cover, and Dvele. For siding and trim that holds up to a Central Valley summer, we specify James Hardie fiber cement. Because we install and service these systems ourselves, we stock the common replacement parts locally, which means a warranty visit in Los Banos doesn’t wait on a parts shipment from out of state. You get the efficiency of factory-built panels with a local crew that knows how the heat affects them here.
Common Home Addition Contractor Problems We See in Los Banos Homes
- R-13 2×4 wall cavities specified by out-of-town designers. Heat soaks into the addition by 11 a.m. in summer, and the AC runs twice as long to hold a setpoint. We frame 2×6 and insulate to R-23 on every Los Banos exterior wall.
- Dark or standard composition shingles that bake in July. Attic temperatures hit 160°F, the decking pre-ages, and heat radiates back into bedroom ceilings at night. Cool-roof shingles are standard on our Los Banos projects, not an upsell.
- Unsealed can lights and top plates. Superheated attic air leaks into the conditioned space, making the mini-split short-cycle and fail to dehumidify. By August the room smells musty. We seal every penetration with foam gaskets before drywall goes up.
- Stucco matching problems when a second story is added. The 1970s stucco texture on the existing ground floor is hard to match with new work. We re-flash the entire floor line and blend the new stucco section so the addition doesn’t look like an afterthought.
Pricing for Home Addition Contractor in Los Banos, CA
A room addition in Los Banos runs $72,000 – $168,000 for 400 square feet. A garage ADU conversion lands at $85,000 – $195,000. A second story addition on a modest single-story home sits between $220,000 and $420,000. The spread comes from foundation work, kitchen and bath rough-ins, and whether you choose site-built or prefab panels from Abodu, Cover, or Dvele. Prefab saves time in the factory but adds crane and logistics costs. Site-built gives you more control over the roofline and stucco match. We give you both options with a written line-item price so you can see exactly where the dollars go. Call (559) 206-2363 for a free estimate with real numbers, not a vague range.
| Project Type | Typical Los Banos Range |
|---|---|
| Room Addition (400 sq ft) | $72,000 – $168,000 |
| Garage ADU Conversion | $85,000 – $195,000 |
| Second Story Addition | $220,000 – $420,000 |
| Bump-Out Addition | $45,000 – $90,000 |
We Also Serve Cities Near Los Banos
Beyond Los Banos, our crews work regular routes through Kerman, Madera, Fresno, and Clovis. If you’re just outside Los Banos and planning a home addition or ADU, the same written pricing, 365-Day Done Right Promise, and local heat-calibrated specs apply. Call and ask whether we’re scheduled in your area this week.
Serving Los Banos, CA - Our Local Coverage Area
We’re based in the Los Banos 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 Home Addition Contractor in Los Banos
Yes. In Los Banos, we specify reflective cool-roof shingles on every ADU and addition we build, because standard dark composition shingles drive attic temperatures past 160°F in July and radiate heat back into the living space all night. A cool-roof shingle reflects more solar radiation and keeps the attic 30 – 40 degrees cooler, which cuts AC runtime and extends the life of the decking. Call (559) 206-2363 if you want a written roof spec before you sign anything.
Usually yes. Los Banos lots are large enough that most homeowners park in the driveway or a side carport after the garage becomes living space. The city’s backyard unit rules are designed to make garage conversions straightforward, and we handle the plumbing, insulation, and roof upgrades as part of the same fixed price. We’ll walk your specific lot and tell you what’s permitted before you commit.
We install R-23 in 2×6 exterior walls on every Los Banos second story addition, not the R-13 2×4 spec that many out-of-town plans default to. That’s the single biggest heat-related mistake we correct on other builders’ projects. With R-23 walls, sealed top plates, and properly sized cooling, your new upper floor holds 72 degrees on a 104-degree afternoon without the unit running constantly.
Both work in Los Banos, and we build with both methods, using Abodu, Cover, and Dvele on the prefab side. Prefab panels save on-site framing time and deliver factory-tight joints, but you still need a local crew to handle the foundation, utility hookups, and the heat-specific roof and insulation details. Site-built gives you more flexibility for a second story stucco match. We price both ways and let you choose.
We re-flash the entire floor line and blend new stucco into the existing texture so the addition doesn’t read as a separate box stacked on top. Most Los Banos homes from the 1970s onward use a sand or dash stucco finish that’s hard to match exactly, so we typically skim-coat the new section and blend it across a natural break line. Before we start, you get a written description of the finish approach so there’s no surprise after the scaffold comes down.
Planning a home addition in Los Banos? Call Benson ADU Fresno at (559) 206-2363 and ask for Troy. We’ll give you a written line-item price, a heat-calibrated spec, and a schedule you can track from your phone. Estimates are free.
Written by Troy Eastman, Owner at Benson ADU Fresno, part of the Relay Home Co. family founded in 2006.
