ADU Construction in Oak Park
Serving 91377 and Agoura Hills, Westlake Village, Thousand Oaks
An ADU in Oak Park is a Ventura County project, and that is the first thing worth saying out loud, because owners here frequently begin by reading rules published by the cities next door. Beyond the paperwork, the local design questions are the community's own: lots that are comfortable rather than vast, houses set close to open space, and a strong shared expectation about how the neighbourhoods look. Good schemes here are modest, well-sited and designed to belong.
Real projects. Real prices.
73 finished remodels published with their final price — nothing hidden.
What our finished LA work actually cost: 27 kitchens ran $23k–$84k, median $50k; 28 bathrooms $28k–$105k, median $38k; 17 whole-home remodels $36k–$440k, median $150k. Real final prices from our own job records, not estimates.
$30,000 A full-length double vanity under twin lit mirrors, with herringbone mosaic shower niches.
$41,000 Espresso shaker cabinetry, light quartz counters and a linear glass mosaic backsplash.
$45,000 Rust and blue slate-tone tile over a pebble mosaic shower floor, with bronze fittings.
$72,000 Honey-oak cabinetry replaced with white shaker fronts and a marble-look quartz island.
$242,700 Structural work to open up the space, a vaulted ceiling, solid wood floors, kitchen and two baths.
$250,000 White shaker cabinetry and veined quartz, with hex-mosaic walk-in showers.
Second dwellings in an unincorporated community
Read the county's rules, not the neighbours'
Agoura Hills and Westlake Village are minutes away and governed entirely separately. Because this community is unincorporated, the county is the authority, and starting from the correct rulebook saves the most expensive kind of redesign.
Fitting a second building on a planned lot
Parcels here have real garden but not acreage. Deciding early what the yard is willing to give up — light, side access, the flat area the household actually uses — produces a better scheme than discovering the trade-off three revisions in.
Building near the open-space boundary
Where a parcel sits against the hills, exterior assemblies and landscape are designed with fire in mind. For a new structure that is not an add-on cost but a specification decision made at the same moment as everything else.
Services from a house built for one household
The main house's electrical panel, water service and sewer connection were sized decades ago for a single dwelling. Verifying their capacity before the plan is loved is a half-day of work at the start and avoids a redesign at the end.
A second dwelling at the end of the street
Many of these properties sit where the neighbourhood stops and the open space begins, and a new building on such a parcel is unusually visible — from the trail, from the hillside, and from the houses that look across at it. Designing all of its elevations with equal care, keeping its roof quiet against the ridgeline behind, and choosing colours and materials that settle into chaparral rather than stand out against it are what make a second dwelling here read as part of the community edge. It is the same discipline the community applies to itself, and it is worth applying voluntarily.
Written by Onn Cohen-Meguri, founder and designer at Design Onn Point — 12+ years in business, 1,200+ finished Los Angeles projects. CSLB #1133368.
Pricing in Oak Park
Market estimate, not our own project data.
Talk to Onn about your Oak Park adu construction.
Free consult, no obligation. Onn reads every inquiry personally — and aims to reply within one business day.
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