Cost guide · West Hollywood · City of West Hollywood Building & Safety
West Hollywood ADU cost guide — every line, no surprises
A fixed-price West Hollywood ADU contract is the sum of five line items: base build, City of West Hollywood Building & Safety permits and fees, design and engineering, sitework and utilities, and finishes. Below is how each one moves in West Hollywood specifically — and where homeowners get burned by quotes that hide them.
City-specific deep dives
- Cost guideWest Hollywood line-item budget guideEvery line item, 2026 prices, no surprises. The number you should be quoting from.
- Permits guideWest Hollywood permits: fees & review windowsPlan-check workflow, fees, and realistic turnaround for this jurisdiction.
- Timeline guideWest Hollywood project timeline — phase by phasePhase-by-phase schedule grounded in active builds, not optimistic Gantt charts.
Base build — what $/sqft actually covers
Base build in West Hollywood runs $385–$520 per square foot for a detached one-bedroom ADU at 2026 pricing. That number assumes Title 24 compliance, code-minimum insulation, mid-grade finishes, and standard MEP. Anything below $360/sqft in West Hollywood is either skipping permits, skipping engineering, or carrying allowance line-items that will balloon during construction.
City of West Hollywood Building & Safety fees & soft costs
West Hollywood plan-check, school fees, sewer capacity, water meter, and utility connection fees typically land between $14,000 and $28,000. The variance is driven by lot conditions: a flat West Hollywood lot on existing sewer is the low end; a hillside lot needing a new lateral and water tap is the high end. We pull these numbers at feasibility, not after deposit.
Design, engineering, and soils
Architectural design, structural engineering, Title 24 compliance, and (when West Hollywood requires it) a geotechnical report typically run 8–11% of project cost. Hillside-zoned parcels and properties within special review overlays push this higher. We disclose the engineering scope up front so the design fee isn't a moving target.
Sitework, utilities, and the hidden 15%
Sitework in West Hollywood — demolition, grading, retaining if needed, sewer tie-in, water service upgrade, electrical panel upgrade to 200A — is where most "cheap" quotes blow up. Older West Hollywood homes nearly always need a panel upgrade and often a lateral upgrade. Budget 12–18% of project cost here. We scope this at survey, before contract.
Finishes — the only line you actually control
Finish allowances (cabinets, counters, flooring, fixtures, appliances) are the single line a West Hollywood homeowner can move materially up or down. Going from builder-grade to mid-luxe adds roughly $35–$60 per square foot. Going to luxury finishes can add $90+/sqft. We model three finish tiers at design so the trade-off is visible, not buried.
West Hollywood · Cost guide
Questions West Hollywood homeowners ask about cost
Direct answers, West Hollywood-specific.
Does WeHo allow ADUs on RSO buildings?
Yes — state law overrides local prohibitions. RSO status on the main house is preserved; the new ADU itself is not automatically RSO.Why is WeHo permitting longer than LA City?
Design review and a smaller department add weeks. The trade-off is a more predictable inspection cadence once permits issue.Does West Hollywood have unique requirements that affect cost?
Yes — City of West Hollywood Building & Safety sets the local rules, and West Hollywood has its own plan-check rhythm. The realistic numbers above reflect 2026 West Hollywood conditions, not statewide averages.
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