A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Home Addition Contractor for Fresno Homeowners
Adding square footage to your Fresno home typically costs between $180 and $450 per square foot depending on the scope, finishes, and whether you go site-built or prefab. Benson ADU Fresno has built home additions across the city since 2006, led by Troy Eastman, and we put a written price in your hand before any work starts. No verbal ballparks that drift once the framing goes up. If you’re weighing a home addition against moving, or just need more room for family, call (559) 206-2363 and we’ll walk you through real numbers for your specific lot and floor plan.
Key Takeaways
- Written pricing before work begins. You’ll see the full line-item cost before you commit to anything.
- 365-Day Done Right Promise. If something isn’t right within a full year, we come back and make it right.
- Real prefab options. We build with Abodu, Cover, and Dvele systems, plus traditional site-built construction.
- Background-checked, uniformed crews. You always know exactly who is walking onto your property.
- Free estimates with no obligation. Call (559) 206-2363 and get a written quote.
Sunroom Addition
A Sunroom Addition is a glass-forward living space built onto an existing exterior wall, typically framed with aluminum or vinyl and finished with insulated glazing. Fresno homeowners add sunrooms when they want a bright reading nook, a plant room, or a three-season hangout without the full cost of a Home Addition Contractor in Fresno conventional room addition. Benson ADU Fresno builds sunrooms in the $30,000 to $90,000 range depending on size, foundation type, and glazing package, and every quote includes a written price with no change orders down the line.
Fresno climate considerations
Central Valley summers punish cheap glazing. We spec low-E glass and proper roof venting so your sunroom doesn’t become an oven by 2 p.m. in July. The orientation of your existing exterior wall matters more than most contractors will tell you.
Foundation and electrical scope
Some sunrooms sit on a lightweight slab-on-grade, while others need deep footings if they attach to a load-bearing wall. Benson ADU Fresno pulls permits and coordinates the structural engineering before a single panel goes up, so there’s no surprise stop-work order from the city.
Second Story Addition Contractor
A Second Story Addition Contractor handles vertical expansions, which means adding a full or partial floor above your existing single-story footprint. This is the right move when your lot is too narrow or too shallow for a horizontal bump-out, and it’s common in older Fresno neighborhoods like Tower District or Fig Garden where lots are compact. For nearby projects, consider our Home Addition Contractor in Clovis. Benson ADU Fresno builds second story additions in the $250,000 to $450,000 range, with engineered beams, stairwell integration, and full weatherproofing included in the written quote.
Structural engineering first
You can’t just stack a second floor on walls that were never designed to carry the load. We bring in a licensed engineer to assess your existing foundation and framing, then size the beams and footings before we quote the job. That’s why our written price holds, because the engineering is done upfront, not guessed.
Living through the build
Most second story additions take four to seven months, and you’re typically living in the house the whole time. We sequence the roof cuts, weatherproofing, and stair access to keep the downstairs clean and the dust contained, and you get real-time photo updates through the Relay app so you’re never wondering what happened that day.
Garage Addition Contractors
Garage Addition Contractors specialize in either expanding an existing garage footprint or adding a new attached or detached garage to a home that lacks one. Madera Home Addition Contractor clients and Fresno homeowners call us for this when they’ve outgrown their two-car garage with tools, a hobby bench, storage, or a third vehicle. Benson ADU Fresno builds garage additions in the $45,000 to $110,000 range depending on size, electrical service, and whether you want a finished interior or basic drywall.
ADU conversion potential
Plenty of Fresno homeowners start with a garage addition and later convert part of it into an ADU or rental studio. We design the electrical panel, insulation, and egress windows with that future flexibility in mind, so you’re not paying to redo the work five years down the road.
Detached versus attached
Attached garage additions share a wall with the house and tie into your existing roofline. Detached builds give you more placement freedom but need separate electrical and a longer foundation run. We lay out both options with real numbers so you can decide based on cost, not guesswork.
Bathroom Addition Contractor
A Bathroom Addition Contractor adds a full or half bath to a home that has too few for its size or layout. This is one of the highest-ROI home additions in Fresno, especially in three-bedroom homes with a single hall bath. A Sanger Home Addition Contractor can help with similar projects nearby. Benson ADU Fresno builds bathroom additions in the $35,000 to $80,000 range, and the written price includes plumbing rough-in, waterproofing, tile, fixtures, and ventilation. The 365-Day Done Right Promise covers every part of that work.
Plumbing realities
Adding a bathroom means tying into your main drain line, vent stack, and supply lines. In older Fresno homes with cast-iron or galvanized plumbing, this can add meaningful scope. We camera the existing lines before quoting so the price you see is the price you pay.
Wet area detailing
Fresno’s hard water and temperature swings stress cheap shower pans and caulk joints. We use full-height waterproofing membrane, proper slope, and solid-surface or tile surrounds that hold up to daily use. No shortcuts in the wet zone, because that’s where the failures always show.
Bedroom Addition Contractor
A Bedroom Addition Contractor expands your sleeping quarters, whether it’s a main-floor primary suite, a nursery off the hall, or a guest room with its own entry. Fresno homeowners add bedrooms when the family grows, when aging parents move in, or when a home office stops being optional. Benson ADU Fresno builds bedroom additions in the $60,000 to $140,000 range depending on square footage, closet configuration, and whether a bathroom is included in the scope.
Egress, closets, and code
A legal bedroom in California needs a window or door sized for emergency exit, a closet, and proper ventilation. We handle every one of those details in the permit drawings, so you’re not stuck with a room that can’t legally be called a bedroom when you go to sell.
Primary suite additions
The most common bedroom addition in Fresno right now is a primary suite with a walk-in closet and en suite bath. These run higher on the square-footage cost because of the plumbing and tile, but they consistently deliver the strongest resale return of any single addition type. We’ll give you the line-item breakdown so you can see exactly where the money goes.
Brands We Service
Benson ADU Fresno builds with Abodu, Cover, and Dvele prefab systems. Abodu units are compact, code-compliant ADUs that arrive as factory-built modules and set in place with minimal on-site disruption. Cover builds panelized structures with precision-milled components that assemble faster than traditional framing and hold extremely tight tolerances. Dvele offers high-performance prefab homes with integrated smart systems and full factory quality control. Each brand has different lead times, price points, and design constraints, and we help you compare them side by side with real numbers for your specific lot.
We also work extensively with James Hardie cladding for site-built additions and exterior updates. Hardie’s fiber cement siding handles Fresno heat, UV exposure, and winter damp without warping or fading the way wood and vinyl do. If you already have a specific product in mind, we’ll spec it and price it. If you’re not sure, we’ll show you two or three options that actually make sense for your street and your budget. Whether you want Abodu, Cover, Dvele, James Hardie, or traditional site-built, we can build it.
Signs You Need a Pro Right Now
- You’re pricing a move because the house feels too small. Selling, buying, paying closing costs, and moving often costs more than the addition you’re avoiding. A 400-square-foot bedroom addition in Fresno can run $60,000 to $100,000, while a move can easily cost $40,000 before you even know you hate the new place.
- Family is moving in and there’s nowhere to put them. Aging parents, adult kids, or a new baby all create space pressure overnight. Rather than squeezing everyone into a converted dining room, an addition solves the problem without the timeline and cost of a full custom build.
- Your garage, spare room, or shed is doing the work of a real room. Working from home in a garage that hits 100 degrees by noon isn’t sustainable. A proper garage addition or office addition gives you space that actually functions.
- You have one bathroom and a family of four. The math doesn’t work. A bathroom addition pays back in daily sanity and resale value, and Fresno buyers consistently rank bath count as a top-three search filter.
- You’ve been quoted by multiple contractors and none of them put the price in writing. Verbal estimates are not quotes. If a contractor won’t hand you a written, line-item price before work starts, that’s how you end up with a $40,000 change order on a $120,000 build. Walk away and call us at (559) 206-2363.
Our Process, Step by Step
- 1
Free on-site consultation. We walk your property, measure the existing structure, check your lot lines, and talk through what you’re trying to solve. You get honest feedback on feasibility, budget range, and whether an addition or an ADU is the smarter dollar. No pressure, no deposit required, no obligation.
- 2
Written scope and price. Within days, you receive a written, line-item proposal that includes permits, engineering, materials, labor, and site cleanup. This is the price you pay. The Relay Visibility Guarantee says it’s in writing before work starts, and that’s exactly what happens.
- 3
Permits and engineering. We handle the city submittal, structural engineering, and any corrections. Fresno’s permitting process has its own rhythm, and we’ve been through it hundreds of times, so we know what gets flagged and how to avoid it on the first pass.
- 4
Build with real-time updates. Every Benson ADU Fresno job gets live photo updates, milestone alerts, and a digital invoice payable by link. You’ll see progress from your phone without having to drive by or knock on the door asking what happened this week.
- 5
Final walkthrough and 365-Day Done Right Promise. We walk the finished addition with you, address any punch-list items, and hand over the written guarantee. If anything covered by the workmanship warranty fails within a full year, we come back and make it right. Free second visit, no fine print, no arguing.
How Much Does Home Addition Contractor Cost in Fresno?
A typical home addition in Fresno runs $180 to $450 per square foot, with the final number driven by the type of space, the finishes, and the site conditions. A basic sunroom might land around $30,000, while a second story addition with a full bath can push past $400,000. A bedroom addition typically falls between $60,000 and $140,000, a bathroom addition between $35,000 and $80,000, and a garage addition between $45,000 and $110,000. Those are real ranges based on what we’ve built across the city, not national averages from a renovation blog.
What moves the price? Foundation type is the biggest lever. A slab-on-grade addition is cheaper than a crawlspace or raised floor, and a second story almost always costs more per square foot than a ground-level bump-out because of engineering, stairwell work, and weatherproofing. Finish level matters too. Builder-grade tile and a basic closet run far less than a primary suite with a walk-in, heated floors, and custom built-ins. Keep square footage modest and put money into a clean, well-ventilated envelope, and you’ll stay near the lower end of the range.
How do you avoid overpaying? Get a written, line-item price before work starts. Full stop. The contractors who hand you a verbal number and ask for a deposit are the ones who show up with change orders at framing inspection. Benson ADU Fresno includes permits, engineering, materials, labor, and site protection in the written quote. Our free estimate covers the full scope, the exact brands, and the payment schedule. Call (559) 206-2363 for an exact quote, it costs nothing but a bit of your time.
Our Service Area Near Fresno
Benson ADU Fresno builds home additions throughout Fresno County and the surrounding central Valley. We work regularly in Sanger, Kerman, Clovis, Madera, Reedley, Selma, Kingsburg, Parlier, and as far out as Hanford, Coalinga, and Los Banos. Typical response time for an on-site consultation is one to three business days depending on how far you are from our Fresno scheduling hub. If you’re anywhere in the broader Fresno-Clovis metro, we can likely be out within 48 hours.
Serving Fresno, CA - Our Local Coverage Area
We’re based in the Fresno area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Home Addition Contractor in Fresno
A home addition contractor is a licensed builder who plans, permits, and constructs new living space attached to or adjacent to your existing home. That includes sunrooms, second story additions, garage additions, bathroom additions, and bedroom additions. Benson ADU Fresno handles the engineering, permits, framing, electrical, plumbing, finishes, and final inspections as a single point of responsibility, so you’re not coordinating five different subs. Call (559) 206-2363 to talk through your specific project.
Most home additions in Fresno take three to seven months from the first consultation to final inspection. A simple sunroom or garage addition can finish in eight to twelve weeks. A full second story addition with a bathroom will run longer, often four to seven months including engineering and permit review. We’ll give you a written timeline with your written price, and you’ll get photo updates at every milestone.
Home additions in Fresno run $180 to $450 per square foot, with most projects falling between $30,000 and $450,000 depending on type, size, and finishes. A bathroom addition typically runs $35,000 to $80,000, while a second story addition runs $250,000 to $450,000. The only way to know your exact number is a free on-site consultation. Call (559) 206-2363 for a written quote.
Yes. Benson ADU Fresno is authorized to build with Abodu, Cover, and Dvele, and we regularly spec James Hardie cladding on both prefab and site-built additions. Each system has different lead times, price points, and design constraints, and we walk you through the trade-offs in plain English. If you already know which brand you want, we’ll price it. If you don’t, we’ll show you real options with real numbers.
We answer the phone 24/7 with a live person, no voicemail loops. If you’ve had a contractor walk off a job, or you need a second opinion on a price with a deadline attached, we’ll do our best to get someone out quickly. For standard consultation requests, we typically schedule within one to three business days. Call (559) 206-2363 and we’ll work with your timeline.
Every Benson ADU Fresno project includes the 365-Day Done Right Promise. If any covered workmanship item fails within a full year, we come back and make it right, free of charge. We also include a written guarantee on every project and a free second visit on any covered repair. The details are in the contract, in plain English, before you sign.
Make a list of what’s not working about your current floor plan, and roughly what you want the space to do. If you have any existing survey, floor plan, or as-built drawings, pull them out. You don’t need to have everything figured out, just know what problem you’re trying to solve, and we’ll bring the options. Call (559) 206-2363 to schedule your free estimate.
Schedule Your Home Addition Contractor Service in Fresno Today
The fastest way to get real numbers for your Fresno home addition is a free on-site consultation. You’ll get a written, line-item price before any work starts, a clear timeline, and straight answers about what makes sense for your lot. Call (559) 206-2363 to schedule yours, no obligation, no pressure, just the information you need to make a smart decision.
Written by Troy Eastman, Owner at Benson ADU Fresno, serving Fresno and the surrounding central Valley since 2006.
