Estimating tools
Best time to build
In South OC most rain falls November–March, and HOA review plus city plan check take weeks before anyone can dig. Pick your city and HOA: we add up the published review times and show when you could be building.
If you start talking to José now, you could be building around
November 20, 2026
- HOA review: none
- City plan check: ~21 days (15 business days)
- Build time: José tells you at the walkthrough
City handout: first review "may take up to 15 business days" (older handout, read only as a search excerpt). The city's plan-check consultant contract lists 10 business days for residential alterations and 5 for resubmittals, but that is not a promise to homeowners. Confirm with the Building Division (949-361-6100).
Average rain by month (inches) — Santa Ana John Wayne Airport
- 2.59J
- 2.64F
- 1.62M
- 0.52A
- 0.27M
- 0.01J
- 0.04J
- 0.01A
- 0.1S
- 0.54O
- 0.8N
- 2.04D
Nearest NOAA station with 1991–2020 normals we could retrieve; it is inland, so coastal South OC may differ. About 87% of the year's rain falls November–March.
In Orange County the monthly normals never drop below about 48 °F or rise above about 80 °F, so cold-weather rules rarely apply; hot, dry, windy days are the bigger risk. Verify against current ACI text before quoting.
Sources (2026-10-23):
- NOAA NCEI 1991–2020 monthly normals, MLY-PRCP-NORMAL (USW00093184)
- NOAA NCEI 1991–2020 annual normals, ANN-PRCP-NORMAL
- NOAA NCEI MLY-PRCP-AVGNDS-GE010HI
- NOAA NCEI MLY-TMAX/TMIN-NORMAL
- City of San Clemente Building Division handout
- City of San Clemente handout (older) — rechecks
- City of San Clemente submittal handouts