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Renology comparisons

City vs city. Real numbers.

Renology Comparisons are side-by-side renovation cost and permit breakdowns between two specific cities, built from the same local research behind our city cost guides. Same project, two places, one clear verdict.

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Every page ends with a verdict: which city is the safer pick for that project, and why.

Renovation Cost Index

ADU Construction

Greater Los Angeles vs San Francisco Bay Area · $215,000 to $415,000

Los Angeles vs San Francisco: ADU Construction (2026)

San Francisco is the most expensive ADU market Renology tracks, running roughly eight to nine percent above Los Angeles for the same detached build: $235,000 to $415,000 against $215,000 to $385,000. Build timelines are identical at 32 to 56 weeks, and both cities issue permits under the same state ADU framework. The practical difference is site logistics: San Francisco lots are tighter, access is harder, and the contractor pool is smaller, which is what pushes bids up.

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Greater Seattle vs San Diego County · $180,000 to $350,000

Seattle vs San Diego: ADU Construction (2026)

Seattle is the most affordable ADU market Renology tracks at $180,000 to $320,000, roughly ten percent under San Diego at $200,000 to $350,000. Build timelines match at 32 to 56 weeks. Permits differ in texture: Seattle SDCI reviews run 3 to 6 weeks and sit at the longer end of that band, while San Diego issues most permits in 2 to 6 weeks with paid expedite available. Climate drives different detailing: 38 inches of annual rain in Seattle versus salt-air corrosion near the San Diego coast.

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Greater Los Angeles vs Orange County coast · $210,000 to $385,000

Beverly Hills vs Newport Beach: ADU Construction (2026)

Both cities push ADU budgets into the upper Southern California range. Beverly Hills carries higher labor and finish-tier expectations on tight in-fill lots. Newport Beach adds coastal overlay review and FEMA flood mapping on bayside parcels. Budget for the same final square footage typically lands within ten percent across the two cities, with timeline being the more visible differentiator.

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