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 Sacramento Homeowners
Adding square footage to a Sacramento home is one of the smartest investments you can make, but it only pays off if the work is done right and the price doesn’t drift. Benson ADU Sacramento, led by Troy Eastman, builds home additions across Sacramento as your trusted Home Addition Contractor - Sacramento, with a written price before any work starts, so you’ll never stand in your own driveway wondering what changed. Our team has been part of the Relay Home Co. family since 2006, and we’ve spent nearly two decades refining a process that puts the plan on paper first. Call (279) 254-1808 and you’ll reach a live person, not a voicemail tree.
Key takeaways for Sacramento homeowners:
- A written price comes before any shovel hits dirt. No verbal estimates that morph later.
- We’re authorized builders for Abodu, Cover, Dvele, and Mighty Buildings prefab systems, plus James Hardie cladding, giving you researched options instead of a single take-it-or-leave-it path.
- Every project carries our 365-Day Done Right Promise. If it’s not right within a full year, we make it right.
- Background-checked, uniformed technicians show up on time and you always know who’s walking onto your property.
Sacramento’s housing market keeps pushing homeowners toward expansion rather than relocation. A home addition in neighborhoods like East Sacramento, Land Park, or Natomas adds functional space and builds equity without the cost and disruption of moving. Whether you’re planning a modest home addition in Sacramento or a full second story, we start with the same promise: a written price and a written guarantee.
Sunroom Addition
A sunroom addition gives Sacramento homeowners a light-filled room that bridges indoor comfort and outdoor living, and it typically costs $28,000 to $75,000 depending on size, glazing, and foundation work. We build sunrooms as fully permitted conditioned spaces with insulated glass, proper setbacks, and James Hardie cladding options, not as flimsy patio covers bolted to a wall. Benson ADU Sacramento manages the entire process from foundation pour to final inspection, and you’ll see a line-item written price before we order a single window.
Glazed Roof Versus Solid Roof
Sacramento summers punish a poorly designed sunroom. We walk you through the thermal trade-offs between a glazed roof that floods the room with light and a solid roof that keeps afternoon heat in check, then price both options in writing so you can decide with real numbers.
Permitting and Foundation Work
Sunroom additions in Sacramento still require full building permits and a proper foundation. We pull the permits, schedule inspections, and handle setback compliance so your sunroom doesn’t become a code correction waiting to happen.
Second Story Addition Contractor
A second story addition contractor handles the structural and architectural heavy lifting when you build upward instead of outward, and in Sacramento this project typically runs $180 to $320 per square foot. That’s a wide range because a second story demands structural evaluation, possible foundation reinforcement, stair placement, and full roof removal. Benson ADU Sacramento brings in licensed structural engineers on day one, gives you a written price that covers the entire scope, and builds with the same transparency you’d expect from an ADU project.
Structural Assessment First
Before we quote a second story, our team reviews your existing foundation and wall framing. Some Sacramento homes built before the 1980s need shear wall upgrades or foundation bolting, and you’ll see those costs itemized in writing, not discovered mid-project.
Living Through the Build
Adding a second story means your home becomes a construction site while you live in it. We sequence the work to keep a weatherproof roof over your head as long as possible and give you a real timeline you can plan around, with photo updates so you don’t have to guess what happened today.
Garage Addition Contractors
Garage addition contractors build attached or detached garage spaces that serve a home addition’s expansion needs, and a typical Sacramento garage addition runs $45,000 to $95,000 for a two-car structure with basic finishes. Benson ADU Sacramento also serves as Home Addition Contractor in West Sacramento and the wider area, building garage additions with an eye toward future conversion, so the slab, electrical service, and wall framing are ready if you later decide to turn that space into an ADU. We name that option upfront because it costs less to prepare for it now than to retrofit later.
Footing and Slab Specifications
Sacramento’s expansive clay soils move, and a garage slab that isn’t engineered for it will crack within a few seasons. We spec deeper footings and proper reinforcement based on your specific lot, not a generic plan pulled from a file cabinet.
Future ADU Conversion Prep
If you’re on the fence about a rental unit later, we can run conduit, stub out plumbing, and size the panel during the garage build for a fraction of what retrofitting would cost. Ask about this during the free estimate, it changes the conversation.
Bathroom Addition Contractor
A bathroom addition contractor handles the plumbing, waterproofing, and ventilation systems that turn dead space into a functional bath, and Sacramento homeowners should budget $22,000 to $48,000 for a standard full bath addition. Half baths run less, curbless showers and custom tile run more. Benson ADU Sacramento pulls plumbing and electrical permits, wet-sets shower pans, and pressure-tests every supply line before walls close up, all with the same written price and 365-Day Done Right Promise we stamp on every project.
Wet Venting and Drain Lines
Adding a bath often means running new drain lines through existing floor framing, which is where cheap bids fall apart. We review your main drain stack capacity and slope clearances before quoting so your new toilet actually flushes when the job is done.
Ventilation and Moisture Control
A Sacramento bathroom addition needs a dedicated exhaust fan vented to the exterior, not into the attic. We spec fan CFM based on the room’s cubic footage and hard-wire it to a timer so moisture leaves the room instead of feeding mold.
Bedroom Addition Contractor
A bedroom addition contractor expands your home’s sleeping capacity with permitted, egress-compliant square footage, and in Sacramento a single ground-floor bedroom addition typically runs $35,000 to $70,000. The spread depends on whether we’re bumping out a wall, converting an existing space, or building a full suite with a closet and adjacent bath. Benson ADU Sacramento, your Home Addition Contractor - Elverta, designs every bedroom addition with proper egress windows, smoke and CO detection tied to code, and insulation levels that meet current Title 24 energy requirements.
Egress and Safety Code
Every bedroom addition in Sacramento must include a secondary escape route that satisfies California egress code. We size the window opening, set the sill height, and document it for inspection, because a bedroom without legal egress isn’t a bedroom, it’s a liability.
Soundproofing and Comfort
Sacramento’s older homes carry noise between rooms easily. We can add insulated interior walls, solid-core doors, and acoustic caulk for bedrooms that actually feel private, and you’ll see those line items in the written price, not as a surprise add-on.
Brands We Service
We’re an authorized builder for Abodu, which means we can assemble their prefab ADU panels on your Sacramento lot with factory-controlled quality and a much faster build cycle than site-built framing. If you’re weighing an ADU against a traditional addition, Abodu brings a predictable product at a predictable price, and we handle the site work, foundation, utilities, and finish trades around it.
For homeowners who want cladding that survives Sacramento’s hot dry summers without fading or warping, we build with James Hardie fiber cement products. Whether your project is a home addition in Citrus Heights or a second story in Sacramento, Hardie siding holds paint longer and resists termites better than wood. We also work with Cover and Dvele prefab systems for clients who want a modern architectural look with precision-manufactured wall panels. Whether you have one of those brands or any other make, we can help.
Signs You Need a Pro Right Now
- Your home’s layout forces a bedroom into a hallway or dining room. When family members are sleeping in spaces that weren’t designed as bedrooms, you’re losing privacy and probably violating egress code. An addition fixes the square footage problem instead of rearranging furniture around it.
- You’re writing rent checks for a storage unit every month. Sacramento storage unit rates have crept up steadily, and a well-designed garage addition or room addition puts that money into your own equity instead. If the monthly storage bill rivals a small mortgage payment, do the math on an addition.
- Your foundation shows visible cracks or recent movement. If you see stair-step cracks in stucco or slab cracks wider than a quarter inch, get a structural assessment before planning any addition. Adding weight onto a compromised foundation compounds the problem.
- You’ve been turned down for a home equity loan because of square footage limits. Some lenders cap loans based on comparable sales in your neighborhood. A permitted bedroom or bath addition raises your home’s appraised value and opens up financing options that didn’t exist before.
- Planning a home office but sharing walls with a toddler. A dedicated workspace addition with proper soundproofing beats a laptop on the kitchen counter. If you’re on video calls daily, a dedicated room pays for itself in professional credibility and sanity.
Our Process, Step by Step
- 1
Phone consultation and scope review. When you call (279) 254-1808, a live person answers and asks about your property, your goals, and any photos you can share. We’ll tell you right then whether your addition is feasible and what it might cost, no appointment required just to get a ballpark.
- 2
On-site assessment and measurements. We walk your property, review your foundation, measure setbacks, and check utility locations. For second story projects we bring in a structural engineer early so you don’t pay for design work that can’t be built.
- 3
Written line-item price. You’ll receive a proposal that itemizes every trade, material category, and permit fee. This is the number we build to. If something changes, we put the change in writing and get your sign-off before work proceeds, never after.
- 4
Permits, build, and daily photo updates. We pull Sacramento permits, schedule inspections, and build in a sequence that protects the livable parts of your home. You’ll get photo updates through our client portal so you can see progress even when you’re at work.
- 5
Final walkthrough and written guarantee. Before we call the job done, we walk the addition with you, note any punch-list items, and hand you the written guarantee that backs our 365-Day Done Right Promise. If a covered item fails within the year, we return and fix it, free.
How Much Does Home Addition Contractor Cost in Sacramento?
A typical home addition in Sacramento runs $180 to $320 per square foot depending on scope, with sunrooms starting around $28,000, bathroom additions in the $22,000 to $48,000 range, garage additions at $45,000 to $95,000, and ground-floor bedroom additions from $35,000 to $70,000. Second story additions sit at the top of the range because they involve structural work, roof removal, and stair construction.
What moves the price most? Foundation conditions, the distance from your utility connections, and whether the addition requires structural reinforcement. Homes in older Sacramento neighborhoods like Oak Park or Curtis Park often need seismic upgrades that newer subdivisions in Natomas or Elk Grove don’t. Prefab options from Abodu or Cover can compress both the timeline and the labor cost because wall panels arrive pre-framed, which reduces on-site carpentry hours.
How to avoid overpaying: get a written line-item price and refuse to work from a lump-sum verbal number. Free estimates from Benson ADU Sacramento include the written proposal, the permit scope, and a clear schedule. If another contractor won’t put their number in writing before you sign, walk away. Our free estimate covers measurement, scope review, and the written price, call (279) 254-1808 to set one up.
Our Service Area Near Sacramento
Benson ADU Sacramento builds home additions across Sacramento and the surrounding communities. We regularly work in Davis, West Sacramento, El Dorado Hills, Antelope, Fair Oaks, Vineyard, Granite Bay, Elverta, Parkway, and Foothill Farms. Typical response time for an on-site estimate within Sacramento is a few business days, and our home addition and ADU team schedules longer-distance visits around your availability. If you’re just outside the core Sacramento area, call (279) 254-1808 and ask, we’ll tell you straight whether we cover your neighborhood.
Serving Sacramento, CA - Our Local Coverage Area
We’re based in the Sacramento 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 Sacramento
A home addition contractor is a licensed builder who adds permitted square footage to your existing home, whether that’s a sunroom, second story, garage, bathroom, or bedroom. Benson ADU Sacramento, our Home Addition Contractor in Antelope and surrounding communities, handles design coordination, structural engineering referrals, permitting, and construction for additions of any scope. Every project gets a written price and a written guarantee before work begins, so you know exactly what you’re paying and what you’re getting.
Most ground-floor additions take 8 to 16 weeks from permit approval to final inspection, while second story additions typically run 4 to 6 months. Prefab installations from Abodu or Cover can compress framing time significantly. Your timeline depends on Sacramento permit review times, weather windows, and the complexity of your foundation work, and we’ll give you a written schedule with your written price.
Plan on $180 to $320 per square foot for most additions in Sacramento, with total projects ranging from about $22,000 for a small bathroom addition to $150,000 or more for a full second story. The per-square-foot number shifts based on foundation conditions, utility runs, and finish selections. Call (279) 254-1808 for an exact quote, estimates are free and put in writing.
Yes, we’re an authorized Abodu builder in Sacramento and handle their prefab ADU panels from site prep through final inspection. We also build with Cover, Dvele, Mighty Buildings, and other prefab systems, plus James Hardie cladding for site-built additions. If you’re comparing prefab against site-built, we’ll give you written prices for both paths so you can choose based on real numbers.
If your existing addition has storm damage, a roof leak, or a structural issue, call us and a live person will answer 24/7 to triage the problem. We schedule urgent assessments for compromised structures and will document the damage for insurance purposes. For safety concerns like sagging beams or cracked foundations, stop using the room and call (279) 254-1808 right away.
Every project from Benson ADU Sacramento carries our 365-Day Done Right Promise in writing, if it’s not done right within one year, we make it right at no charge. You’ll receive a written guarantee stamped on your project file, and if a covered repair fails, we return for a free second visit. We don’t hide behind a verbal warranty or a handshake.
Take photos of the area you want to expand, locate your property line markers if you have them, and think about which rooms you’d like to enlarge and how you’ll use them. Have your utility bills handy if you know where your electrical panel and water main are located. We’ll handle the rest on-site, measurements, setback review, and a written price within days of the walkthrough.
Schedule Your Home Addition Contractor Service in Sacramento Today
Ready to see your home addition in writing before you commit a dollar? Call Benson ADU Sacramento at (279) 254-1808 for a free estimate and a written line-item price. A live person answers 24/7, and your proposal includes the 365-Day Done Right Promise in writing. No obligation, no pressure, just a real number for the home you want.
Written by Troy Eastman, Owner at Benson ADU Sacramento, serving Sacramento homeowners with permitted home additions and ADU construction since 2006.
