A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted ADU Builders for Fresno Homeowners
Adding a second home to your Fresno lot means inviting a construction crew onto your property for months, not days. Most homeowners choose an ADU builder on price and hope the people who show up are who the salesperson promised. That’s backwards. Since 2006, ADU Builders - Fresno from Sutton ADU has shown every homeowner the name and photo of each technician before they arrive, locked the price in writing before work starts, and backed the completed build with a written 365-Day Done Right Promise. If the work isn’t right within a full year, we make it right. Call (559) 785-0627 to get your written estimate from an ADU builder in Fresno that proves who’s coming before they lift a tool.
ADU Construction
ADU Construction is the full process of building an accessory dwelling unit on your Fresno property, from the first site assessment through final inspection and keys in hand. You need it when you want livable square footage that pays rent, houses family, or adds resale value without moving. Sutton ADU Fresno manages every phase: planning submittal, foundation, framing, MEP rough-in, exterior cladding, and finish work. A detached ADU in Fresno typically runs $180,000 to $320,000 before site work, depending on size, finish level, and whether you choose a prefab line or site-built construction. You get a written price before we start, not after.
Prefab vs. Site-Built
We work with factory-built systems from Abodu, Cover, and Dvele alongside conventional site-built construction. A prefab unit can cut on-site time by weeks. A site-built ADU gives you more freedom on dimensions and materials. We’ll give you straight numbers for both paths so you can decide with your eyes open.
What the Written Price Includes
Your line-item quote covers permits, drawings, all labor, and materials. No allowances left vague. No change orders slipped in later. If something on the build fails after completion, the 365-Day Done Right Promise covers it in writing.
Detached ADU
A Detached ADU is a freestanding living unit built separately from your main house on the same Clovis ADU Builders service area lot, with its own entrance, kitchen, bath, and address. You need one when you want rental income or family housing without sharing walls, plumbing runs, or daily noise with the main residence. Sutton ADU Fresno has built detached units from 400-square-foot studios to 1,200-square-foot two-bedrooms. Most detached ADUs in Fresno run $200,000 to $320,000 depending on size and site conditions. We schedule a free site visit, measure your lot, and give you a written price before any work starts.
Setbacks and Site Constraints
Fresno’s zoning rules require a setback, the gap between your new structure and the property line, typically 4 feet for rear and side yards on standard single-family lots. We check your parcel’s specific requirements during the first visit and build the unit to fit. Trees, utility easements, and access for trucks all factor into the price and we account for them up front.
Garage Conversions vs. Detached Units
Converting an existing garage almost always costs less than building detached because the foundation, walls, and roof are already standing. A garage conversion in Fresno can run $90,000 to $180,000 depending on the condition of the slab and the extent of structural retrofit needed. A detached ADU gives you a fully separate rental with better privacy and typically higher market rent.
JADU
A JADU, or junior accessory dwelling unit, is a compact living space of up to 500 square feet created within the existing footprint of your Fresno home, often from a spare bedroom, garage, or unfinished area. You need one when you want lower-cost rental income or a private space for an aging parent without the expense of new construction. Sutton ADU Fresno converts garages, basements, and underused rooms into legal JADUs that meet California state standards for efficiency kitchens and separate entrances. A JADU conversion in Fresno commonly runs $80,000 to $150,000 depending on plumbing and electrical work required. Our written estimate tells you exactly what your existing space will cost to convert.
Efficiency Kitchen Requirements
A JADU requires an efficiency kitchen, which means a small cooking area with a refrigerator, a sink, and a food preparation counter. A full four-burner range is not required. Many homeowners pair a JADU with an existing bathroom to keep costs low, though a private bath increases rent and occupant independence.
Rental and Owner-Occupancy Rules
California law generally requires the property owner to live on site, either in the main house or the JADU itself, for a JADU to be legal. Fresno enforces this through the permit process. We’ll walk you through how owner-occupancy affects your rental plans and help you choose between a JADU and a detached unit based on how you intend to use the space.
ADU Plans
ADU Plans are the architectural and construction drawings that Fresno’s building department reviews and approves before any work begins, including site plans, floor plans, structural details, and utility layouts. You need them before you can pull a permit, and a bad set of plans stalls a project for weeks. Sutton ADU Fresno prepares plan sets in-house using your lot’s actual dimensions and the specific prefab or site-built system you choose. Plan preparation and permit submittal typically costs $8,000 to $20,000 depending on unit complexity and engineering requirements. Your written price includes plan production so there’s no separate surprise invoice.
What the City of Fresno Reviews
Fresno’s planning department checks setback compliance, lot coverage, parking requirements, and California Building Code compliance. Structural and Title 24 energy calculations must accompany the architectural sheets. We handle submittal, respond to plan check comments, and revise drawings until the permit is issued.
Prefab Plan Packages
When you choose a system from Abodu or Dvele, the manufacturer provides factory drawings that we adapt to your site. This cuts plan time significantly because the structural and energy details are already engineered. We still produce the site plan, foundation plan, and utility connection drawings specific to your Fresno parcel.
ADU Contractor
An ADU Contractor is the licensed general contractor who coordinates every trade, order of work, and inspection on your Fresno accessory dwelling unit project from demolition to certificate of occupancy. You need one because a project this size involves concrete, framing, plumbing, electrical, mechanical, roofing, and finishes, and someone has to own the schedule and the quality. Sutton ADU Fresno serves as the single point of contact, with every crew member operating under the Threshold Standard: background-checked, identity-verified, uniformed, and photo-badged. General contracting fees are typically built into the total project price rather than billed separately, which is why our written estimate always reflects the full cost. Call (559) 785-0627 to talk through your project scope.
Threshold Verified Crews
Every person who steps onto your Fresno property has passed a background check and identity verification before they arrive. You receive their name and photo before the visit. They arrive in a clean, marked uniform and show a photo ID badge at the door. This is the rule on every project, no exceptions.
Subcontractor Accountability
For site-built units we work with a network of Fresno-area framing, concrete, electrical, and plumbing crews who have been vetted to the same standard. We don’t hide behind “the sub did it.” If a subcontractor’s work fails, Sutton ADU Fresno owns the fix under the 365-Day Done Right Promise.
ADU Design
ADU Design is the process of translating your goals, your lot, and your budget into a buildable unit, including layout, materials, door and window placement, and exterior treatment. You need it whether you’re building a rental, a home office, or a space for family, because the right design decisions control both construction cost and long-term livability. Sutton ADU Fresno offers design guidance tied directly to the product lines we build with, including James Hardie exterior cladding systems that stand up to Fresno’s summer heat and valley rainfall. Design work is included in our project pricing rather than billed hourly. We show you three-dimensional drawings before you commit so you see exactly what gets built.
Climate-Appropriate Materials
Fresno routinely sees summer highs above 100°F and winter lows that hover near freezing. Design choices like insulation value, glazing orientation, and exterior cladding matter more here than in coastal markets. We specify James Hardie fiber cement siding and trim because it resists the valley’s dry heat without warping, and pairing it with a high-R-value wall assembly keeps energy costs down year-round.
Matching the Main House
A detached ADU that echoes the roofline, window style, and exterior tones of your main house reads as intentional rather than tacked on. We look at the primary structure’s architecture during the design phase and carry key elements into the new unit. This matters for resale and neighborhood compatibility.
Backyard ADU
A Backyard ADU is a detached living unit placed in the rear yard of your Fresno home, the most common configuration for rental income and multigenerational housing because it maximizes separation and privacy. You need one when you have usable yard space and want a fully independent unit with its own parking, entrance, and outdoor area. our ADU Builders in Madera and Fresno handle site preparation, utility trenching, foundation work, and unit placement with attention to how the structure sits on your lot. Backyard ADUs in Fresno typically run $200,000 to $320,000 depending on size, finish level, and distance from existing utility connections. We give you a written price that includes trenching and site work so there are no surprise charges when the ground opens up.
Utility Runs and Trenching
Running sewer, water, and electrical lines from the main house to a backyard unit is a significant cost driver that many builders leave vague in their estimates. A long trench through hardpan soil or around existing landscaping changes the price. Our written quote separates site work from unit cost so you know exactly what the ground work costs before we dig.
Placement and Yard Preservation
Where the unit sits changes how much of your yard you keep. We evaluate access for future maintenance, shade from mature trees, and drainage patterns during the site visit. The goal is a unit that feels like it belongs there, not one that consumes the outdoor space you already enjoy.
Brands We Service
Sutton ADU Fresno works directly with factory-built ADU systems from Abodu and Cover, both California-based manufacturers with units engineered for the state’s permitting process. Abodu’s units are built in a factory and set on site in a matter of days, which works well for Fresno lots with clear crane or truck access. Cover designs panelized systems that assemble quickly and offer a high degree of interior customization.
We also have field experience with Dvele’s high-performance envelope and James Hardie fiber cement cladding systems on both prefab and site-built units. Whether you already own an ADU from one of these manufacturers or you’re comparing options for a new build, our team can assess your lot, give you straight numbers, and handle the build. If you have a unit from another manufacturer, we can help.
Signs You Need a Pro Right Now
- Your lot has drainage problems you can see. Standing water after rain, a yard that slopes toward the house, or soil that stays spongy means your ADU foundation needs professional site work before anything gets built. Ignoring it leads to slab cracks and water intrusion.
- Your existing garage has structural cracks or a sagging roofline. A garage conversion depends on the existing frame being sound. If walls are bowing or the roof sags, you need a professional assessment before spending money on finish work.
- Your electrical panel is near capacity. An ADU adds a meaningful electrical load. If your panel is full or your home was built before 1980, a licensed contractor needs to evaluate whether a panel upgrade or subpanel is required before the unit gets connected.
- You have a shared lot line or an unusual parcel shape. Corner lots, flag lots, and properties with easements all trigger specific Fresno zoning review. Getting the plan wrong at the start costs weeks and rework.
- You need rental income this year. Fresno’s permitting and plan check process takes time, and prefab units have production schedules. If you want a unit rented by a specific date, start the planning conversation now rather than after the busy season has already begun.
Our Process, Step by Step
- 1
Site assessment and written estimate. We visit your Fresno property, measure the lot, check access, and discuss how you intend to use the unit. You receive a line-item written price before any work is authorized. No deposit required to get the number.
- 2
Plan preparation and permit submittal. We produce or adapt the plan set and submit it to the City of Fresno. We handle plan check comments and revisions. You know exactly what’s being built before the first inspection.
- 3
Crew introduction and verification. Before construction starts, you receive the name and photo of every technician assigned to your project. On day one, each person shows a photo ID badge at the door and arrives in a marked uniform.
- 4
Construction and inspections. We manage framing, MEP rough-in, exterior cladding, and finish work with the city inspecting at each required stage. You get progress updates and the written price doesn’t move unless you request a change.
- 5
Final walkthrough and the Done Right Promise. We walk the completed unit with you, address any punch list items, and hand over a signed 365-Day Done Right Promise. If anything isn’t right within one full calendar year, call us and we make it right. No haggling.
How Much Does ADU Builders Cost in Fresno?
A typical detached ADU in Fresno runs $180,000 to $320,000 depending on square footage, finish level, and whether you select prefab or site-built construction. JADU conversions land lower, usually $80,000 to $150,000 because the structural shell already exists. Garage conversions fall in the middle at $90,000 to $180,000 depending on slab condition and required upgrades.
What moves the price: utility trenching distance, soil conditions, panel upgrades, finish selections, and whether the unit needs a new sewer lateral or water line. What should not move the price: the crew’s schedule, material overages the contractor didn’t plan for, or “unforeseen conditions” that a competent site assessment would have caught. Your written estimate from Sutton ADU Fresno separates site work from unit cost so you can see exactly where the money goes. A free estimate includes a full scope review, lot assessment, and a fixed number you can plan around. Call (559) 785-0627 to schedule yours.
Our Service Area Near Fresno
Sutton ADU Fresno serves homeowners across the central San Joaquin Valley, including ADU Builders in Madera and ADU Builders in Reedley, plus Clovis, Sanger, Selma, Kerman, Fowler, Kingsburg, Tulare, Visalia, and Firebaugh. Whether your lot is in the Fig Garden neighborhood or out in the county, we schedule site assessments quickly and show up when we say we will. If you’re outside Fresno proper, call us at (559) 785-0627 and we’ll confirm availability in your area.
Serving Fresno, CA - Our Local Coverage Area
We’re based in the Fresno area and know this community well, including our ADU Builders in Sanger. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About ADU Builders in Fresno
An ADU builder is a licensed contractor who specializes in accessory dwelling units, the secondary living spaces built on single-family residential lots. They manage design, permitting, construction, and inspections from start to finish. Sutton ADU Fresno has been building these units since 2006. The key difference with us is the Threshold Standard: you get a written price, a photo-badged crew, and a 365-Day Done Right Promise in writing.
A prefab unit from Abodu or Cover can be placed and finished in 4 to 6 months after permits are approved. A site-built detached ADU typically takes 8 to 12 months depending on size and finish level. Fresno plan check and permitting usually adds 6 to 10 weeks before construction begins. Call (559) 785-0627 for a realistic timeline based on your specific lot and unit.
Most detached ADUs in Fresno run $180,000 to $320,000 before site work, with JADU conversions at $80,000 to $150,000. Prefab units tend to cost less in labor but more in manufacturing, while site-built units give you more dimensional flexibility. The price depends on size, finishes, utility runs, and panel upgrades. Our written estimate breaks it down line by line so you’re not guessing.
Yes, we have direct experience with Abodu, Cover, and Dvele systems, plus James Hardie exterior cladding on both prefab and site-built projects. We can help you compare unit costs, lead times, and site requirements between manufacturers. If you already own a prefab unit that needs a foundation or connection work, we handle that too.
We schedule site assessments as soon as you call, and plan production starts once you approve the written estimate. Fresno’s permit process runs on the city’s timeline, which we can’t control, but we submit immediately and respond to plan check comments the same week we receive them. The fastest way to keep your project moving is to get the site assessment done early. Call (559) 785-0627 to schedule.
The 365-Day Done Right Promise covers defects in workmanship for one full calendar year from project completion. If something fails that we installed, Sutton ADU Fresno makes it right, and a second visit to address it is free. This is a written guarantee stamped on every project, not a verbal assurance.
Clear the build area of stored items, vehicles, and debris so crews can access the site. Make sure your property line is marked if you have had survey work done. We handle utility locates and permits. The biggest preparation is deciding on finishes early so lead times on windows, cabinets, and appliances don’t stall your finish date.
Schedule Your ADU Builders Service in Fresno Today
Call (559) 785-0627 to schedule a free site assessment and get a written price for your Fresno ADU. You’ll know exactly who’s coming to your property before they arrive, and exactly what the build costs before we start. No surprises, no pressure. That’s the Sutton way.
Written by Miles Hartwell, Owner at Sutton ADU Fresno, serving Fresno homeowners since 2006.
