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 Davis
Adding an ADU in Davis means dealing with two things most Sacramento-area cities don’t have: a zero-net-energy ordinance that mandates all-electric, solar-ready construction, and a housing stock full of 1960s-era surprises hiding behind drywall. That’s why homeowners call us at (279) 254-1808 before they sketch a single wall. We know what the city will ask for, what older Davis homes typically reveal once you open them up, and what it actually costs to build here. Benson ADU Sacramento is the ADU Builders team that puts every number in writing before work starts – so you’re not guessing when the permit review comes back.
As a Room Addition Contractor in Davis, we serve the city directly, with crews who know Central Davis bungalows, West Davis ranches, and the newer subdivisions east of Pole Line Road. Dispatch and scheduling are coordinated from our Sacramento office, but the people on your job site understand Davis permitting and Davis soil. That local knowledge matters more here than almost anywhere else in the region.
Why Benson ADU Sacramento Is Davis’s Preferred ADU Builders Company
Davis homeowners don’t have the patience for vague verbal estimates. And with good reason – the zero-net-energy ordinance that took effect here in 2020 changed how every ADU gets designed, priced, and permitted. If a contractor quotes you a gas-line ADU plan in Davis, the city will reject it. We’ve built our reputation here by quoting the all-electric, solar-ready plan correctly from day one.
Troy Eastman leads our team with a simple rule: inspect first, quote second, and write every number down. Davis customers tell us the same thing – they appreciate knowing that a post-tensioned slab check is part of our initial walkthrough, not a surprise line item after demo. That’s why homeowners in Wildhorse, Mace Ranch, and Old East Davis keep recommending us to their neighbors.
Our crews arrive in uniform, background-checked, and with a written scope already in hand. When the city of Davis asks for revisions – and with all-electric ADUs, they will – we handle the paperwork and keep you updated with real-time tracking. A live person answers our phones around the clock, so you’re never stuck leaving a voicemail when the building department sends a correction at 4:45 p.m.
JADU in Davis
A JADU in Davis is typically the fastest legal way to add a rental or in-law unit inside an existing single-family home, and it’s priced differently than a detached ADU because you’re working within walls you already own. The catch is that many Davis homes from the 1960s and 1970s have original electrical panels and wiring that were never sized for a second dwelling unit, even one under 500 square feet. Expect a JADU conversion here to run $80,000 to $180,000 depending on the kitchen, bathroom, and whether your panel needs the 200A upgrade the city will almost certainly require.
Garage-to-JADU Conversions
Converting an attached garage into a JADU in Davis often triggers the same zero-net-energy requirements as a detached ADU, which means all-electric appliances and heat-pump HVAC. If your garage sits on a post-tensioned slab without perimeter footings – common in Central Davis tract homes – we flag that in the inspection before we write your contract, not after demo.
Interior Space Conversions
Taking over an existing bedroom wing or finished bonus room for a JADU means less foundation risk but more electrical work. We pull the wall finishings to verify what’s actually inside, then price any wiring upgrades as a written allowance, so you’re not surprised when the city asks for arc-fault breakers or a subpanel.
ADU Plans in Davis
ADU Plans in Davis have to account for solar orientation, battery-ready electrical panels, and heat-pump HVAC from the very first drawing, because the city’s zero-net-energy ordinance doesn’t give you an option to run a gas line later. That’s a mandate not found in Woodland or West Sacramento, and it changes the layout: your roof plane needs realistic solar exposure, your panel needs dedicated capacity, and your mechanical closet needs to hold a heat-pump water heater. Plan on $3,500 to $8,000 for a full ADU plan set here, including Title 24 energy calcs and the all-electric equipment schedule the city wants to see.
Site Feasibility Drawings
Before you commit to a full plan set, we recommend a feasibility sketch that maps your property against Davis setback rules, lot coverage, and solar access. This step runs $1,200 to $2,500 and often saves homeowners from buying a plan set that the city won’t approve.
Permit-Ready Plan Sets
When we produce ADU plans, they include the solar-ready panel schedule, heat-pump equipment, and electrical load calculations the Davis building department reviews line by line. Every set includes the written allowances we carry into construction, so the plan and the price stay connected.
Trusted Brands We Service in Davis
We install and finish ADUs from Abodu, Cover, and Dvele, and we clad with James Hardie siding when the site calls for it. Because Davis imposes all-electric and solar-ready standards, our prefab partners work directly with our team on panel schedules and envelope specs before the unit ever ships. We keep common Davis-specific components in local inventory – heat-pump water heater rough-ins, solar-ready subpanels, and high-efficiency window packages – so a plan revision doesn’t stall your build for three weeks.
Common ADU Builders Problems We See in Davis Homes
- Post-tensioned slabs with no perimeter footings. Many detached garages in Central Davis were built in the 1970s on slabs that were never meant to carry a dwelling unit. Converting one triggers a foundation retrofit that can cost $15,000 or more, which is exactly why we inspect before quoting.
- 1960s-era 100A panels. The city will require a 200A service upgrade for nearly every ADU, and most original panels in Davis ranch homes are maxed out. We write the panel upgrade into the contract as a line item, not a change order later.
- Zero-net-energy compliance gaps. A plan that includes a gas line or skips solar-ready wiring will get bounced in Davis plan review. We quote the all-electric version from the first conversation so the timeline doesn’t collapse at permit intake.
- Shear-wall failures in older tract framing. Many 1960s and 1970s Davis homes used 2×4 framing that doesn’t meet today’s shear-wall review for attached ADUs. Plywood upgrades get priced into the original scope, so the city’s structural comments don’t become a mid-project surprise.
Pricing for ADU Builders in Davis, CA
A detached ADU in Davis typically runs $250,000 to $450,000 for a one-bedroom unit, while an attached JADU falls between $80,000 and $180,000. Prefab options from Abodu or Dvele usually land in the $200,000 to $350,000 range once site work, foundation, and utility tie-ins are included. What moves the number here more than anything is your home’s age: a 2005 house in Mace Ranch with a 200A panel and standard footings will cost less to build on than a 1972 Central Davis home with a post-tensioned garage slab and original wiring. Call (279) 254-1808 to schedule a free estimate with Troy and get a written line-item quote before you decide anything.
We Also Serve Cities Near Davis
We bring the same written-price approach to ADU Builders in Davis and the surrounding communities – West Sacramento, Sacramento, Elverta, and Antelope. If you’re in a nearby city and considering an ADU or home addition, the same ADU Builders team handles your project with the same 365-Day Done Right Promise and written estimate. Call (279) 254-1808 for specifics.
Serving Davis, CA - Our Local Coverage Area
We’re based in the Davis 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 Davis
It adds roughly $15,000 to $30,000 for all-electric appliances, heat-pump HVAC, a heat-pump water heater, and solar-ready panel capacity, and it adds two to four weeks to plan review because the city checks Title 24 all-electric compliance in detail. You cannot build a JADU in Davis with a gas line, so the all-electric package isn’t optional. Call (279) 254-1808 and we’ll price the exact all-electric scope for your home.
Very likely, yes, because many Central Davis detached garages sit on post-tensioned slabs without perimeter footings, and the city will require a proper footing before it approves a dwelling unit. Budget $12,000 to $18,000 for the retrofit, and expect us to confirm it in the inspection before we finalize your written quote.
We write a wiring-allowance figure into your contract before any walls come down, and if the actual condition exceeds that allowance, we show you photos and a written change order before buying materials. In Davis, that usually means upgrading from a 100A to a 200A panel, adding arc-fault breakers, and sometimes re-feeding knob-and-tube remnants in original walls. You’ll approve the number in writing before we proceed – no surprise invoices after the fact.
Davis applies its zero-net-energy ordinance and solar-ready requirements to every ADU, and the building department reviews Title 24 all-electric compliance more rigorously than most nearby cities. Plan for 8 to 14 weeks from submittal to issuance here, versus 6 to 10 weeks in parts of Sacramento. We track every comment in real time and send you status updates, so you’re not wondering where the permit sits.
You can usually keep the original studs, but Davis will require plywood shear-wall upgrades and hold-downs at the foundation in most older detached structures, because the building department treats a garage-to-ADU conversion as bringing the whole structure up to current seismic code. Budget $4,000 to $9,000 for shear-wall and hold-down work, depending on wall length and window openings. We’ll scope it during inspection so your written quote already includes it.
Written by Troy Eastman, Owner at Benson ADU Sacramento, serving Davis since 2006.
