What a restaurant, shop or office build-out costs in Downey (2026)

Opening a cafe, restaurant, retail store or office in Downey? A tenant improvement (build-out) turns a lease space into your business. Hemisphere A&E designs, permits and builds it. Here are typical numbers, the local rules, and your next step.

Typical build-out numbers in Downey

• A 1,500 sq ft cafe build-out costs about $600,000 all in, in a move-in-ready shell with a standard finish.
• A full restaurant of the same size costs about $775,000, with a full kitchen, hood and grease interceptor.
• An office or retail store of the same size costs about $300,000 to $340,000.
• Typical rent in areas like Downey: about $37 per sq ft per year, or about $4,625 a month for 1,500 sq ft plus shared costs.

Run the free tenant improvement (build-out) cost calculator for Downey

Permits for a business space in Downey

Who runs permits

City of Downey Community Development: Planning and the Building and Safety Division, with Downey Fire and Public Works.

Change of use and health permits

Turning a shop into a restaurant is a change of use. It can trigger parking, restroom, fire and accessibility upgrades, plus a health department plan check for food.

Free lot check in Downey

Send Hemisphere A&E your address. We look up your zoning and lot size, what fits (ADU, junior ADU, SB 9, new home, apartments, remodel or business space), red flags like fire zones or hillside rules, and a rough cost range. No cost, no pressure. Email info@hemisphereae.com or call (619) 762-7144.

More cost guides for Downey

• What an ADU costs in Downey
• What a new home costs in Downey
• What an apartment building costs in Downey

Cost guides for more of LA County

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