TITLE 24 · SOLAR CALCULATOR

Size the solar + storage your project needs, by climate zone.

Enter building type, conditioned floor area, and zip code. Multifamily adds a stories field too. Shows the one result that actually applies, Garden-Style-MF or Commercial/High-Rise, ported from the same math as the old buildwiser.ai calculator and budgeted at $3.00/Wdc solar and $1,100/kWh storage.

Building Type

Conditioned Floor Area

Dwelling Units

Only applies to Garden Style MF (3 stories or less)

Zip Code

California zip codes for climate zone lookup

Enter project details and click Calculate
to see Title 24 prescriptive requirements.

Estimates are for illustrative purposes: Budget Cost figures use flat $3.00/Wdc (solar) and $1,100/kWh (storage) unit costs and don't reflect site-specific bids, incentives, or interconnection costs. Full methodology: Title 24 Calculator: Calculations Reference.