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 Roseville
Adding space to your Roseville home usually costs between $180 and $420 per square foot depending on whether you’re building out, building up, or converting existing space into a new bathroom or bedroom. You’ll want a contractor who can walk your lot, check the existing panel and slab, and hand you a real number before the first cut. Our specialty is accessory dwelling units, garage conversions, and home additions throughout Roseville, from Cherry Glen to Cirby Ranch. Call (279) 256-1973 for a free estimate on a bathroom or bedroom addition in Roseville.
Why Lodgewick ADU Sacramento Is Roseville’s Preferred Home Addition Contractor
Our crews work in Roseville every week. They know the 1970s tract layouts around Cirby Ranch where the original 100-amp panels sit maxed out, and they know the newer developments near West Park where setbacks and utility access shape what you can build. That local experience matters when you’re spending $150,000 to $500,000 on a project that has to pass Roseville’s design review and building inspection. Russ Delmar, who leads our team, has spent years working through the specific code triggers Roseville inspectors look for when a wall comes open.
We’re part of the Kingswell family of home-service companies, operating under The Kingswell Guarantee since 2010. That guarantee is not a handshake. It’s a written document you get before work starts: the price, the arrival window, the cleanup standard, and the 365-Day Done Right Promise in writing. Every home addition in Roseville we build gets that document first.
Bathroom Addition Contractor in Roseville
A Bathroom Addition Contractor in Roseville typically handles two scenarios: adding a full bath to a home built with only one, or adding a dedicated bath to a planned ADU or garage conversion. On Roseville’s 7,000 to 10,000 sq ft lots, homeowners often choose to bump-out a master bath from an existing bedroom or carve a bath into converted garage space. The work includes demolition, framing, plumbing rough-in, waterproofing, tile, and finishing. In Roseville, a standard 5×8 bathroom addition usually falls in the $45,000 to $85,000 range, while a larger master bath with higher-end finishes can push past $120,000.
Plumbing and Slab Work
Homes built in Roseville between 1970 and 1990 often sit on slab-on-grade foundations. Cutting into that slab to run new drain lines can be straightforward or can expose rebar and shallow utilities. Either way, it’s work that belongs in the written estimate before framing starts.
Ventilation and Moisture Control
Roseville’s hot, dry summers do not excuse poor ventilation in a new bathroom. A properly sized exhaust fan and moisture barrier matter more than homeowners expect, especially when the addition shares a wall with an existing bedroom. We spec these details in the contract, not in a change order later.
Bedroom Addition Contractor in Roseville
A Bedroom Addition Contractor in Roseville usually builds one of two things: a ground-floor bedroom addition off the back or side of the house, or a detached ADU with a bedroom, kitchenette, and bath. Detached ADUs in Roseville have become the most common path because the city’s larger lots allow for rear-yard placement while keeping the main house untouched. A single bedroom addition with no plumbing runs roughly $80,000 to $140,000 in Roseville. A detached ADU with a bedroom, bath, and kitchenette typically lands between $180,000 and $320,000 depending on finish level and whether the panel needs an upgrade.
Setbacks and Utility Access
Roseville’s design standards for ADUs require specific rear and side yard setbacks. Older tract homes sometimes have sewer laterals that run through the exact spot where a detached unit makes the most sense. We flag that before pricing, because relocating a sewer line is a five-figure conversation that should never be a surprise.
Panel Capacity and Service Drops
If your Roseville home still runs a 100-amp panel, adding a bedroom with an electric mini-split or baseboard heat will almost always trigger a 200-amp upgrade. On one Cherry Glen project, Russ Delmar’s crew opened the wall to tie in a new bedroom and found the original 100-amp panel already maxed with cloth-wrapped wiring running back to the meter. The change order for a new panel and feeder was documented, priced, and approved in writing before any work continued. The final inspection passed first time.
Trusted Brands We Service in Roseville
We build with systems we trust. That includes Abodu for prefab ADU shells, Dvele for high-performance panelized construction, and Cover for fully factory-built units installed on Roseville lots. For site-built additions, we use James Hardie siding and trim. We keep familiarity with these manufacturers current so a Roseville homeowner doesn’t end up waiting on a backordered component from a supplier we haven’t worked with before. Each project gets a written price that includes the materials we’ve specified, not just a line item that says “materials.”
Common Home Addition Contractor Problems We See in Roseville Homes
- Maxed 100-amp panels. Most 1970s and 1980s Roseville tract homes were wired for a single household. Adding an ADU or a bedroom with electric heat almost always forces a panel upgrade to 200 amps or a separate service drop, and that cost needs to be in your estimate from day one.
- Unmatched stucco and siding. Original textures and colors from builders in Roseville’s older neighborhoods are often no longer manufactured. If we don’t identify this before opening a wall, you end up with a visible patch. We check during the estimate, not after demolition.
- Slab surprises. Cutting into a 1970s slab for new plumbing or footings can hit rebar in unexpected places or shallow utility lines. That’s manageable when it’s anticipated and priced; it’s a budget-killer when it’s not.
- Waterproofing failures behind old stucco. Roseville’s dry summers hide what winter moisture did years ago. We document what we find when walls open and write a repair allowance into the original contract so it doesn’t become a fight later.
Pricing for Home Addition Contractor in Roseville, CA
A home addition in Roseville runs $180 to $420 per square foot. Finished bathroom additions sit between $45,000 and $120,000. Detached ADUs that our Home Addition Contractor team builds in Roseville usually range from $180,000 to $320,000. The biggest cost swings come from panel upgrades, slab conditions, and finish level. Our contracts include a written allowance for code upgrades identified during inspection, so the price we give upfront reflects what the permit will actually require. Call (279) 256-1973 to schedule a free estimate with a written price before any work starts.
We Also Serve Cities Near Roseville
Our crews work throughout the Sacramento metro. If you’re in Folsom, North Highlands, Carmichael, or Mather, we handle home additions, ADUs, and garage conversions there as well. We’re a regional Home Addition Contractor in Roseville team that adjusts our scheduling around local permit turnaround times and inspection availability across the area. The Kingswell Guarantee applies everywhere we build.
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 Home Addition Contractor in Roseville
Most 1980s Roseville homes with an original 100-amp panel will need a 200-amp upgrade or a separate service drop when you add an ADU. The existing panel was sized for one household, not two. We inspect the panel and service line during the estimate, and the upgrade is written into the contract price alongside a documented change order process if new findings come up during rough-in. Call (279) 256-1973 for a free estimate.
Roseville requires that ADUs and additions preserve the character of the existing neighborhood. That means rooflines, siding, and window placements need to match the primary home in many cases. On older Roseville streets around Cirby Ranch and Cherry Glen, that can mean matching stucco textures that are no longer manufactured. We check during the estimate so the final inspection doesn’t fail over cladding.
We document it with photos, write a change order showing the exact repair scope and price, and get your written approval before touching the affected area. The original contract includes an allowance for exactly this situation, because in Roseville’s older tract homes, failed waterproofing behind stucco is common enough to plan for. This is what The Kingswell Way means: the surprise gets priced and approved before work moves forward.
Yes. Detached ADUs are the most common project we build in Roseville because they leave the main house untouched while adding a fully independent unit in the rear yard. Your main house stays under its existing systems except for any required panel upgrade, which is typically the only utility change that crosses the property line. Call (279) 256-1973 for an exact quote, and we’ll include the panel in the written estimate.
Because some contractors quote the visible scope without checking the systems behind the walls. A written Roseville quote should include panel capacity, slab conditions, stucco matching, and setback compliance before the contract is signed. When those items are missing from the first number, the second number is the real one. We price them from the beginning. Call (279) 256-1973 for a free estimate with a written price that matches the permit.
Written by Russ Delmar, who leads the Lodgewick ADU Sacramento team. Russ has worked on home additions and ADUs throughout Roseville, including the older tract neighborhoods where panel upgrades and slab conditions change the scope. If you’re planning a Roseville addition, call (279) 256-1973 for a free written estimate before you make the first cut.
