The Canyon ADU
Backyard build · canyon hillside · 640 sqft · 18 weeks
the assignment
A backyard ADU for aging-in-place parents on a sloped Topanga lot. Needed to clear hillside ordinance height limits, preserve a heritage coast live oak, and meet Chapter 7A fire assemblies for the Very High Fire Hazard Zone.
Spec sheet —
- Cladding
- 1×6 western red cedar over ignition-resistant sheathing
- Roof
- 24-gauge standing-seam steel, Class A
- Heat
- Mitsubishi heat pump, single zone
- Windows
- Marvin Essential, dual-pane tempered
- Permits
- LA County PW BLD2023-01188
Challenges
- 12% slope across the building footprint
- Heritage coast live oak with a 22 ft drip line
- Very High Fire Hazard Severity Zone — Chapter 7A everything
Solutions
- Pier-and-grade-beam foundation, zero excavation under drip line
- Cedar rainscreen with ignition-resistant backing + Class A standing-seam roof
- Heat-pump HVAC + solar-ready conduit + ember-resistant vents on day one
Timeline
18 weeks · 5 milestones · 2024
- Week 1–6Apr 3
Permits, survey, tree protection plan
- Week 7–9May 15milestone
Foundation, underground utilities
- Week 10–13Jun 5
Framing, dry-in, windows
- Week 14–16Jul 3
MEP rough, insulation, drywall
- Week 17–18Jul 24milestone
Finishes, final inspection, occupancy
“We worried it would feel like a backyard box. It feels like a real house.”
Topanga · ADU · FAQ
The Canyon ADU — frequently asked
Where exactly is the The Canyon ADU adu?
Backyard build · canyon hillside, Topanga. We protect exact addresses for privacy — neighborhood and city are public, the street is shared only with serious clients during reference calls. See more recent California work.
How long did the The Canyon ADU adu take?
18 weeks on-site (about 4 months) plus the design and permit phases that ran in parallel before construction. 640 sqft cedar-clad detached ADU. Permitted in 6 weeks. Solar-ready, heat pump, full kitchen. The full sequence is on the process page.
What was the biggest challenge on the The Canyon ADU build?
12% slope across the building footprint We document them in the field journal so the next owner avoids them.
Can I get a adu like The Canyon ADU built in my California city?
Yes — most of what we did here translates to other Topanga-area lots and to similar neighborhoods nearby. Cost shifts based on lot conditions, utility runs, and finish choices — plug your numbers into the ADU cost calculator. We'll bid your specific scope, not a generic template.
Can I tour the The Canyon ADU project in person?
Sometimes — past clients opt in to limited reference visits scheduled 2–4 weeks out. We never visit unannounced. Ask the project manager during your discovery call, or request a visit directly.
What did the The Canyon ADU owners prioritize during design?
Documented in the project write-up. The full design philosophy lives on the process page; field notes from similar Topangabuilds are on the field journal.
How did permitting work for The Canyon ADU?
Standard Topanga ministerial pathway. Current clock and fees are on the California permit directory.
What did The Canyon ADU cost per square foot?
Filed in the project metadata. Statewide ranges sit in the 2026 California cost report; ADU- specific bands in the ADU cost calculator.
Did The Canyon ADU use unusual materials or methods?
Notes live on the project page. The glossary defines any specialty system mentioned.
Could I get a The Canyon ADU-style build on a different California lot?
Usually — the design vocabulary transfers. Cost and permit shift with city, slope, and utility runs. Start with a discovery call.
Who would I work with if I commissioned a The Canyon ADU-style project?
The same studio team. Coverage by region is on the locations index.
Where do I see other completed projects similar to The Canyon ADU?
The projects index filters by type and city. The topic clusters page groups similar scopes together.
What lessons from The Canyon ADU apply to first-time ADU owners?
Start early, walk the lot, budget contingency. Full lessons-learned series on the field journal.