ADU Construction in Agoura Hills
Serving 91301 and Oak Park, Westlake Village, Calabasas
The ADU question in Agoura Hills is answered by topography and by fire, in that order. A generous flat tract lot on the valley floor can take a well-proportioned detached unit with garden to spare; a hillside parcel against the mountains offers a spectacular setting and a genuine engineering problem. Both are worth doing. Both require the exterior specification and the defensible-space thinking that building at the wildland edge demands, and neither is well served by a standard plan bought off a shelf.
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 deep navy wall over textured white tile, with a floating walnut vanity and matte black fittings.
$38,000 Emerald shaker cabinetry and brass hardware around a cream range and an apron sink.
$56,000 Marble-look slab walls with matte black fittings and a backlit mirror over an oak vanity.
$63,500 White cabinetry with brushed-gold hardware, a white-oak island, and a marble-look slab backsplash.
$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 buildings in the Santa Monica Mountains
Flat lot or hillside parcel
On the valley floor the build is conventional and the design conversation is about composition and privacy. On a slope it begins with foundations, retaining and access, and those answers shape everything that follows — including whether the project is worth doing at all.
A small building at the wildland edge
A second structure near the mountains is specified for embers from the first drawing: roof assembly, vents, eaves, decks and the planting around it. It is not an upgrade here; it is the standard way a building on these parcels is put together.
Two households under one hillside
Where buildings step down a slope, they look at each other. Placing windows, terraces and approaches so both dwellings have privacy and a share of the view is a design problem solved on the plan rather than afterwards with planting.
A complete application to the city
The Building & Safety Division reviews the package — site plan, structure, services, energy — through the city's process. For a new dwelling on a mountain-edge parcel, a coordinated set is what turns a demanding application into a routine one.
Planting that keeps its distance
A second building near the mountains is designed together with the ground around it. Defensible-space thinking shapes what is planted close to the walls, how far shrubs and trees stand from the structure, where irrigation runs, and what surfaces sit immediately against the building. Done as part of the design, it produces a garden that looks intentional and a building that is properly protected. Done afterwards, as a reluctant response to an inspection or an insurer, it usually means removing planting somebody has grown fond of. On these parcels the landscape is not decoration around the architecture; it is part of how the architecture performs.
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 Agoura Hills
Market estimate, not our own project data.
Talk to Onn about your Agoura Hills adu construction.
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