Wilton Additional Dwelling Unit Contractor
Designed, permitted, and built on your Wilton lot. Detached, attached, and garage-conversion ADUs handled by a veteran-owned General B contractor who picks up the phone after move-in day.
Additional Dwelling Units Built for Wilton Lots
Wilton’s housing pressure has made the Additional Dwelling Unit one of the smartest moves a homeowner can make. Whether the goal is rental income, a private space for aging parents, or a teenager’s first apartment behind the main house, an ADU adds a second residence on land you already own without the cost or wait of buying a new property in this market.
California state law (Government Code 65852.2) overrides most local restrictions that previously limited ADU construction, and the Wilton updated its zoning code to comply. On most single-family residential lots in Wilton, a homeowner can now build a detached ADU up to 1,200 square feet, an attached ADU up to 50% of the primary residence’s floor area, or convert an existing garage or basement into a separate dwelling unit.
ADC Construction handles every type. Adam meets you on the property, walks the lot, and tells you exactly what the Wilton will and will not permit on your specific parcel. Setbacks, height limits, fire-separation requirements, sewer connections, and utility tap fees are all sorted before the design phase begins, so the project doesn’t stall at the permit counter.
The three most common ADU types we build in Wilton: detached ADUs (a standalone structure in the backyard, typically 600 to 1,200 sqft, full kitchen, bathroom, and bedroom), attached ADUs (added onto the main house with a separate entrance, often built off the back or side wall), and garage-conversion ADUs (existing detached garage converted to a dwelling unit, often the lowest-cost path).
Wilton lots vary widely in what they can accommodate. Older neighborhoods tend to have deeper lots with more rear-yard space, which favors detached ADUs with their own driveways or rear-access paths. Newer subdivisions often have shallower rear yards and tighter side setbacks, which makes an attached ADU or a garage conversion the practical answer. Lot coverage maximums, second-story height restrictions, and rear-yard privacy considerations for neighbors all factor in. Adam reviews the parcel map and your jurisdiction’s lot-coverage calculator with you during the quote so the project is sized to what your lot can actually carry.
Wilton is Sacramento County’s rural corner, a community of ranches, horse property, and multi-acre parcels southeast of Elk Grove where the zoning is built to keep the country feel. That rural character shapes the ADU here in a way it does not in the subdivisions. Most Wilton properties are on well and septic rather than county utilities, and the lots are big enough that a detached ADU can sit well back from the main house with its own driveway, its own septic line, and enough separation that a tenant, a ranch hand, or a family member has a real, private home. Adam checks the septic capacity and the well flow first, because a second kitchen and bath adds load that the existing system has to be able to carry.
The Cosumnes River runs through the Wilton area, and parts of the community fall near its floodplain, so on lower parcels we pay attention to flood elevation and set the finished floor and the drainage accordingly. Wilton also sits in an elevated fire-hazard area in places, which can bring wildfire hardening requirements into play, so where they apply we build the ignition-resistant details in from the start. The valley heat is real out here too, so the unit gets a right-sized heat pump, deep insulation, and low-E glazing to stay comfortable through the summer and meet Title 24. And because Wilton’s whole appeal is space and rural quiet, we place and design the ADU so it works with the property’s ranch character rather than looking like a suburban box dropped on a country lot.
Adam earned his General B contractor’s license after serving in the US Army, and he built ADC Construction in 2022 on one principle: treat every property like it’s your own home. That standard applies whether the ADU is a simple garage conversion or a custom detached unit with a covered patio and full laundry.
Call (209) 200-5302 or request a free on-site quote. See finished work in our project gallery, including detached ADUs, garage conversions, and full-home remodels across the Sacramento and San Joaquin valleys. We serve Wilton, Sacramento, Folsom, Lodi, Stockton, and 29 more cities within 30 miles of our Lodi office.
Six Reasons Wilton Homeowners Trust Us with the ADU
Licensed & Insured
California General B license with full liability coverage. Wilton permits pulled and inspected start to finish.
Veteran Discipline
US Army standards applied to every ADU jobsite: clean, organized, on time, on budget, no excuses.
Free Project Quote
Adam walks the Wilton lot, assesses zoning + setbacks, and explains your options with zero pressure.
Transparent Pricing
Itemized quotes within 48 hours. Foundation, framing, utilities, finish. Every line item explained.
Design + Build
Architectural plans, structural engineering, Title 24 energy, and construction all coordinated under one contract.
Post-Project Support
We pick up the phone six months, six years later. The relationship outlasts the certificate of occupancy.
ADU Construction Across the Wilton Region
Same craft standard on every ADU within 30 miles of Lodi.
Wilton ADU Questions
How much does an ADU cost in Wilton, CA?
A Wilton ADU prices out along a few clear lines. Converting an existing garage or an outbuilding is the least expensive route because you inherit the slab and the shell, so the work is insulation, a kitchen, a bathroom, and the code upgrades that turn storage into living space. A mid-size detached unit adds excavation, a foundation, framing, and a fresh utility run. A full-size detached build with a covered patio, laundry, and better cabinets and flooring lands highest. Wilton parcels are large and almost all of them are on well and septic, so the real cost driver is often the distance from the house to the new pad and whether the water and waste systems can carry a second dwelling as they sit. Adam checks all of it on the walkthrough, then the written quote breaks out every line item within 48 hours.
Do you handle the Wilton ADU permits?
Yes. We pull every permit required by the local Planning Department and Building Division: zoning clearance, building permit, plumbing, electrical, mechanical, and any encroachment permits for sewer or utility taps, and coordinate inspections through final certificate of occupancy. Permit fees are line-itemed in your quote.
What’s the maximum size ADU allowed on my Wilton lot?
State law allows up to 1,200 square feet for a detached ADU on most Wilton single-family lots regardless of local zoning. Attached ADUs are limited to 50% of the primary residence’s floor area, capped at 1,200 sqft. Adam will measure your specific lot and confirm what’s allowed during the on-site quote visit.
How long does an Wilton ADU build take from design to move-in?
Plan on 8-12 weeks for permits, plans, and engineering before the first shovel hits dirt, then 4-8 months of construction depending on type. A garage conversion is the fastest path (3-5 months building). A custom detached ADU is the longest (6-8 months building). We provide a realistic schedule with your quote and hold to it.
Can I rent out my Wilton ADU?
Yes. California law requires Wilton to allow long-term rentals of ADUs on single-family lots. Short-term rentals (Airbnb, VRBO under 30 days) are restricted under local ordinance. Confirm current rules with the Planning Department before counting on STR income. Long-term tenant rental is the standard income path most of our Wilton ADU clients pursue.
My Wilton ranch is on well and septic. Can I still add an ADU?
Usually yes, and the septic and well are where we start. A second dwelling adds a kitchen and bath, which loads the tank and leach field, so Adam checks whether your existing septic can carry the added bedrooms or whether the county will want an upgraded system, and confirms the well can supply both the main house and the unit without dropping pressure. On Wilton’s big parcels there is generally room to run a separate septic line and driveway to a detached unit set well back, which is part of what makes rural ADUs work so well here. We line-item any septic or well upgrade in the quote so the true cost is clear from the start.
Does the Cosumnes River floodplain affect a Wilton ADU?
On some Wilton parcels, yes. The Cosumnes runs through the area and parts of the community sit near its floodplain, so on lower lots we check the flood elevation and set the unit’s finished floor and the site drainage to keep it out of harm’s way. Where a parcel also falls in an elevated fire-hazard zone, wildfire hardening requirements can come into play, and we build those details in as well. Adam reviews the flood and fire mapping for your specific parcel during the walkthrough and designs the ADU to the real conditions on your land, not to a generic assumption.
Wilton ADU Built to Last. Answered After Move-In.
Ready to start your Wilton ADU project? Call Adam directly or request a free on-site quote. We walk the lot, talk through your options, and quote it transparently.