Your ADU Contractor in Thousand Oaks

Start with whoever puts the oak survey and the fire map ahead of the floor plan. Every oak in Thousand Oaks carries a protected zone reaching at least 15 ft out from the trunk that no ADU may be built or graded inside, and a parcel mapped High or Very High is built to the Wildland-Urban Interface Code, so a unit drawn before those two are known gets drawn twice. Master Construction has worked the Conejo Valley since 1994 under license #1027281, files the TO/24 package and the VCFD 610B form itself, and carries a Thousand Oaks unit from feasibility read to keys under one fixed-price contract.

Four drivers. The type: a garage conversion keeps its walls and roof, a detached unit pays for its own foundation, frame and roof, and a JADU inside the house lands between the two. The size, because 750 sq ft of interior livable space is where Thousand Oaks impact fees switch on. The site: retaining and a slope report on a hillside lot, hand digging and pier footings near an oak's protected zone, WUI-code roofing, vents and glazing on a fire-mapped parcel. Then utility runs, a panel upgrade, and a gallery set versus custom drawings. We walk the lot first and put the number in a written fixed-price scope.

Three blocks of time. Drawings, the oak survey, the geotechnical report and the fire-flow test come first; the fire-flow request to the water purveyor is the one to start early because the VCFD 610B form waits on it. City review runs on the state clocks: 15 business days for a completeness determination, 60 days from a complete application for a decision, and 30 days when the unit uses a pre-approved detached plan. Construction of a detached unit runs longer than a garage conversion, and a prefab gallery unit trades weeks of site framing for factory lead time and a crane day. The milestone schedule goes into the contract.

Yes. In September 2026 the Thousand Oaks ADU Plans Gallery held 17 plans: ten prefabricated units, 340 to 992 sq ft, already reviewed for building-code compliance, plus seven free site-built plan sets, 400 to 1,000 sq ft, that still go through full plan check. Filters mark seven plans WUI-compliant, twelve all-electric and ten solar-ready. A pre-approved plan still needs a permit and a site-specific plan covering location, fire access and foundation, and the application asks for the plan number. The homeowner gets the plan from its designer directly; we handle the site work, the filing and the build.

Yes, and the city's written standard fits the street-facing attached garage on a 1960s to 1980s tract. The garage door comes out and windows matching the house go in, at least 10 percent of the new wall must be doors or windows, and a converted wall facing the street gets a 3 ft landscape strip. No replacement parking is required. A conversion keeps the garage's existing setbacks, skips the new utility connection the city asks of a detached unit, and needs no solar array. A JADU of up to 500 sq ft inside the attached garage is the other option, with a deed restriction recorded before the permit issues.

Often, with the geometry drawn first. The oak ordinance covers every tree of the genus Quercus regardless of size; the protected zone starts 5 ft outside the dripline and is never less than 15 ft from the trunk. No unit may be built or graded inside it unless that would rule out the state-minimum 800 sq ft unit, in which case encroachment is allowed with a 36-inch box oak planted one-for-one, or an in-lieu fee. Slopes steeper than 25 percent are off limits, and in the Protected Ridgeline Overlay a unit stays 300 ft horizontally and 100 ft vertically off the crest or goes at the lowest workable elevation.

Yes, on terms of 30 days or longer. The municipal code rules out rentals of 30 days or less for ADUs and JADUs alike, and the house and the unit may go to different tenants. No owner-occupancy requirement attaches to an ADU, so an owner who lives elsewhere may build and rent one. A JADU needs the owner on site only when it shares a bathroom with the house, under the 2026 state rule. Long-term tenants here often work at Amgen, Los Robles Regional Medical Center or Cal Lutheran, and the unit cannot be sold separately from the lot.

No. Civil Code 4751 makes any CC&R provision that prohibits or unreasonably restricts an ADU or JADU on a single-family lot void and unenforceable, Civil Code 714.3 does the same for deed covenants, and since 2025 a board may not attach fees as a condition. What a board keeps is reasonable design review over materials, colors and placement that does not add unreasonable cost or block the unit. That private review is separate from the city's ministerial permit and runs on its own calendar, which in Lang Ranch's gated sections and the master-planned tracts on the Westlake side means we file the architectural package and the TO/24 package together.

Yes, all three under one contract. The site walk comes first and maps oak driplines, slope, the fire hazard zone and the panel; then we draw the unit to the lot or fit a gallery plan to it. We assemble the TO/24 filing with the title report, tracking form, geotechnical report and energy forms, request the fire-flow test from the water purveyor and carry the VCFD 610B through Fire Prevention. Our own crews pour the slab, frame, run the electrical and plumbing, and finish the roof, stucco and drywall to match the house. The unit gets its certificate of occupancy after the final inspection.