Your ADU Contractor in Newbury Park

The one who checks the address before the drawing. A Newbury Park lot is either inside the City of Thousand Oaks or inside the Casa Conejo county island, and the two file with different governments under different rules. On the city side the builder should already know the Cal-Am fire-flow request, the VCFD 610B form and the TO/24 portal, and on a 1960s house should own the trades that set the budget: the panel, the sewer tie-in and the slab. Master Construction designs, permits and builds ADUs across Newbury Park under Lic. #1027281, family owned in Ventura since 1994, with electrical, plumbing and concrete crews of our own.

The type decides more than the finishes. A garage conversion on a Borchard or Reino lot reuses the slab, the roof and the walls; a detached unit adds a foundation on expansive clay, a sewer run to the street, its own solar and, near the open space, the WUI exterior package. Panel capacity swings the number on the 1960s houses. Slope, oak driplines and HOA review add engineering and time in Dos Vientos. A gallery plan trims design fees but not construction. We give a figure after a site walk, as a written fixed-price scope that covers design, permits and the build.

The state sets the clocks and the fire district sets the front end. Thousand Oaks has 15 business days to call a city-side application complete and 60 days from that point to approve or deny it; a pre-approved gallery plan on a detached unit is decided within 30 days. Before any of that runs, the Cal-Am fire-flow test and the VCFD 610B form have to exist, so we order the test at the site walk. A garage conversion is the short build; a detached unit adds a foundation, framing and its own solar. Dos Vientos adds the HOA calendar, run alongside the city's. Dates go on paper at contract signing.

Yes, through the Thousand Oaks ADU Plans Gallery, for parcels inside the city. Start with the WUI filter: seven of the 17 plans listed as of September 2026 are tagged WUI-compliant, the shortlist for a lot along the Newbury Park open space. Ten plans are prefabricated units, already reviewed for building code, from 340 sq ft to 992 sq ft. Seven are free site-built sets from the SDC Plans Program and HEART of SMC that still go through full plan check. You license the plan from the designer and enter its number on the city application; we draw the site-specific sheet. Casa Conejo parcels cannot use the gallery.

Yes, and on the two-car garages of the 1960s through 80s streets it is the budget ADU because the slab, the roof and the walls already exist. The conversion owes no replacement parking, needs no new utility connection, holds its existing setbacks and may grow 150 sq ft for an entry. In Dos Vientos the third bay of a three-car garage becomes a junior ADU of up to 500 sq ft with its own entrance and a recorded deed restriction. The panel is the usual surprise: original services on the older streets get replaced before a subpanel goes in. A Casa Conejo garage converts under county rules.

A construction package and paperwork. The county fire district's 2025 hazard maps, in force since 1 July 2025, set the tier, and a parcel that straddles two zones takes the higher one. In a High or Very High zone the unit is built to the WUI code, formerly Chapter 7A: Class A roof, ember-resistant vents, enclosed or protected eaves, ignition-resistant siding and tempered or multi-pane glazing, with 100 ft of defensible space. Every city-side ADU also needs a VCFD 610B form built on a Cal-Am fire-flow test, and the district can require sprinklers where flow or access falls short even though the state rule ties ADU sprinklers to the house.

Yes, on any lease of 30 days or longer. The house can lease to one tenant and the unit to another, an owner does not have to live on the property to rent an ADU, and the only owner-occupancy condition left is on a junior ADU that shares a bathroom with the house. Thousand Oaks bars stays of 30 days or less, collects an estimated-rent form with the permit for the state's annual housing report, and does not allow the unit to be sold apart from the lot. Long-term demand in Newbury Park tends to come from the Amgen campus and the Rancho Conejo biotech corridor inside the ZIP code.

No. An outright ban in the CC&Rs is void under Civil Code 4751, and since 30 June 2025 the association may not attach fees or financial conditions to its approval either. What DV Ranch East, Dos Vientos Ranch West and the tract HOAs keep is reasonable design review: matching materials, colors and roof slope, plus their view and slope easements. That review runs on the association's own calendar and has no bearing on the city's ministerial clock, so the architectural application leaves our office the same week as the TO/24 filing. Casa Conejo, the Borchard and Reino streets and Deer Ridge have no HOA.

Design, permits and build run under one contract, with one person answering the phone. Jurisdiction gets settled at the site walk, city or Casa Conejo county, then the fire-zone tier, the oaks within 15 ft of the work, the slope and the panel. We draw the unit or adapt a gallery plan with a site-specific sheet, file through TO/24, request the Cal-Am fire-flow test on Form 625, walk the VCFD 610B through Fire Prevention with any Dos Vientos architectural submittal alongside, and answer plan check comments ourselves. Our own crews handle the panel, the sewer tie-in, the slab, the framing, the Class A roof and the finishes through final inspection.