A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Roseville
Adding an ADU in Roseville usually costs between $180,000 and $350,000 for a detached unit, while garage conversions run $120,000 to $200,000. Those are real numbers from the Roseville market, not national averages. We serve Roseville from our Sacramento dispatch office, with crews who know the Cherry Glen and Cirby Ranch neighborhoods as well as the newer developments east of Fiddyment Road. If you’re weighing a backyard unit on a 1970s tract lot, call (279) 256-1973 and we’ll give you a written price before any work starts.
Why Lodgewick ADU Sacramento Is Roseville’s Preferred ADU Builders Company
Roseville homeowners deal with a specific set of conditions: 1970s – 1990s tract homes on 7,000 – 10,000 sq ft lots, original electrical panels, and a city that wants ADUs built but enforces strict design standards to protect neighborhood character. Our crews work those conditions every week. We pull the original permit history before quoting, because a 1980s Roseville home with a 100-amp panel tells us something important before we ever set foot on the slab.
Russ Delmar leads our Roseville work. He’s the person who walks your lot, checks the utility access, and writes the allowances into your contract that cover what the walls might hide. When a Cherry Glen homeowner asks whether their original panel can handle a detached unit, Russ gives a straight answer: almost never. That candor has built our reputation here. Roseville customers call us because the price doesn’t move once it’s in writing, unless a change order is priced and approved first.
A live person answers our phone 24/7. Not a voicemail loop. When you call (279) 256-1973 about a Roseville build, you reach someone who can schedule a lot visit and talk through what you’re planning.
ADU Construction in Roseville
ADU Construction in Roseville means building a separate living unit on a lot that already has a primary home, and in this town the process almost always starts with what’s already in the ground and in the walls. A typical Roseville tract lot from the 1980s has slab-on-grade construction, wood framing with stucco, and a rear yard that can fit a detached unit but not without looking hard at setbacks and utility easements. Roseville’s planning department has streamlined ADU permits in recent years, making it one of the easier Sacramento-area cities to get approval, but the design standards are real: unit size, height, and materials have to match the neighborhood’s look.
Inspection Before Quote
We pull permit history and do a site walk before we write a single number. On a 1980s Roseville home, that means checking the panel capacity, the roof tie-in point, and the drainage pattern in the rear yard. We document what we find and put it in writing.
Written Allowances
Every Roseville ADU construction contract we write includes allowances for the unknowns: electrical service upgrades, framing corrections, waterproofing repairs. That’s how The Kingswell Way works. Say the price before the work, write the guarantee before the first nail, come back if it fails within 365 days.
Detached ADU in Roseville
Detached ADU construction in Roseville typically runs $200,000 to $350,000 for a custom stick-built unit, and $180,000 to $280,000 for a prefab model from Cover, Dvele, or Mighty Buildings installed on a prepared site. A detached unit is the most common choice here because Roseville’s larger suburban lots, often 7,000 sq ft or more, leave room in the rear yard without eating the whole lawn. The catch is what sits between the back door and the new unit: old electrical service, outdated framing at the tie-in, and drainage that hasn’t been re-graded since the original build.
Panel and Service Upgrades
In neighborhoods like Cirby Ranch and Cherry Glen, the existing 100-amp panel was sized for one household. Adding a detached ADU almost always requires a 200-amp upgrade or a separate service drop. We price that in from the start, not after the walls are open.
Slab and Drainage Surveying
Roseville’s hot, dry summers hide what winter rain reveals. We survey the rear yard for drainage swales, old septic lines, and low spots before we design the foundation. A slab poured over a hidden drain line is a six-figure mistake.
Trusted Brands We Service in Roseville
We install and finish ADUs from Cover, Dvele, and Mighty Buildings, and we match each brand to the lot and the budget. Prefab units are popular in Roseville because the controlled factory build avoids weather delays during the 100°F summers, but the onsite foundation, utility connections, and finish work still have to be done right. A prefab kit’s sticker price is never the whole number. We stock common parts and materials for these systems locally, which shortens turnaround when a panel needs a breaker or a drainage detail needs a reflash.
Common ADU Builders Problems We See in Roseville Homes
- 100-amp electrical panels. Roseville tract homes from the 1970s through 1990s in areas like Cherry Glen and Cirby Ranch were built with panels sized for one household. A detached ADU pushes the load past capacity every time, so a panel upgrade or separate service drop is almost always required.
- Aluminum branch wiring. Some Roseville homes built in the late 1960s and 1970s have aluminum wiring. When we open walls to tie in the ADU, that wiring has to be evaluated and often replaced or pigtailed with the right connectors before we proceed.
- Failed stucco waterproofing at patio tie-ins. The spot where a rear patio roof meets the main house is a classic Roseville leak point. Dry summers hide it. Winter rain exposes it, and if we’re tying an ADU into that wall, the waterproofing gets redone as part of the job, not after the leak shows up two seasons later.
- Undersized rafters in older roof sections. Many 1970s and 1980s Roseville homes used 2×4 rafters that don’t meet current code. When an ADU ties into the roofline, the existing framing often needs reinforcement to pass inspection.
Pricing for ADU Builders in Roseville, CA
Detached ADU construction in Roseville runs $200,000 to $350,000 for custom builds and $180,000 to $280,000 for prefab units from the brands we work with. Garage conversions land between $120,000 and $200,000. What moves the number: whether your panel needs a 200-amp upgrade, the condition of the existing roof tie-in, drainage corrections in the rear yard, and the finish level you choose. We write allowances for the known unknowns into your contract. If we open a wall in a 1980s Roseville home and find aluminum wiring or failed waterproofing, you approve a written change order before we touch it. Call (279) 256-1973 for a free estimate with real numbers, not ballparks.
We Also Serve Cities Near Roseville
Our crews regularly work in Folsom, North Highlands, Carmichael, and Mather. Each of those cities has its own permitting quirks and housing stock, but the inspection-first approach stays the same. If you’re outside Roseville and planning a backyard unit, the Roseville team can point you the right way, and our ADU Builders hub covers the full process.
Serving Roseville, CA - Our Local Coverage Area
We’re based in the Roseville 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 ADU Builders in Roseville
Yes, in nearly every case a Roseville home with a 100-amp panel needs an upgrade or a separate service drop. The panel was sized for one household’s lighting, appliances, and HVAC. A detached ADU adds a full second load: its own kitchen, its own heating and cooling, its own laundry. Sharing isn’t code-compliant or safe. Expect $3,500 to $6,500 for a 200-amp panel upgrade, depending on the existing service location. Call (279) 256-1973 to have Russ Delmar check your panel before you plan around it.
It means we pull the original permit history, walk the lot, check the panel, the roof tie-in, and the drainage before we quote. On a 1980s Roseville tract home, we usually find at least one thing the homeowner didn’t know about. We write allowances for those discoveries into the contract, so the price you sign is the price you pay unless you approve a written change order.
We stop work, document what we found, and present a written change order before anything else happens. In a Cherry Glen home, our crew opened a rear wall to tie in a new detached ADU and found original aluminum branch wiring, undersized 2×4 rafters, and failed stucco waterproofing. We stopped, called in a Roseville inspector who confirmed the panel was maxed, and gave the homeowner a written change order covering the 200-amp upgrade, rafter reinforcement, and a full reflash. Priced and approved before the next swing of a hammer. That’s the only way we work here.
Because the kit is only the building. The site work, foundation, utility connections, panel upgrade, drainage, and finish work all happen in Roseville, on your lot, with local permits and inspections. A prefab unit from Cover or Dvele might be priced at $120,000 for the module, but the completed project in Roseville lands between $180,000 and $280,000 once the ground is prepared and the systems are connected. Anyone who quotes the kit price as the total is leaving out the most expensive part. Call (279) 256-1973 and we’ll give you the whole number in writing.
It adds a day here and there, but it prevents the alternative: a contractor who hits an unknown, keeps working, and hands you a five-figure surprise at the end. A written change order takes an hour to price and sign. The 365-Day Done Right Promise means we come back if anything fails within a year, free. That’s more valuable to a Roseville homeowner than shaving a day off the schedule. Estimates are free at (279) 256-1973.
Call Lodgewick ADU Sacramento for ADU Builders in Roseville
If you own a 1970s – 1990s Roseville home and you’re thinking about a detached ADU, a garage conversion, or a junior unit, start with a lot visit and a written price. Russ Delmar and our Roseville crews know exactly what opens up when the walls come apart in this town. Call (279) 256-1973 for a free estimate, and we’ll put the numbers in writing before you commit to anything.
Written by Russ Delmar, Owner at Lodgewick ADU Sacramento, serving Roseville and the surrounding Sacramento area.
