Flood zones for vacant land in Acton
Of the 1,851 vacant lots in Acton, 87 (5%) are in a FEMA high-risk flood zone, where a home loan on a new building needs flood insurance. 1,173 (63%) are in zone X with minimal risk, and 9 are moderate risk. 582 are zone D, where flood risk has not been studied.
Flood zones in Acton
| FEMA zone | Vacant lots | Share |
|---|---|---|
| X | 1,182 | 64% |
| D | 582 | 31% |
| AE | 64 | 3% |
| A | 22 | 1% |
| AO | 1 | under 1% |
What the letters mean: flood zones explained.
Lots in a high-risk flood zone in Acton
Zones A, AE, AH, AO and VE, lowest assessed value first (25 of 87).
Lots outside the flood zone in Acton
Zone X with minimal risk, lowest assessed value first (25 of 1,173).
Questions about land in Acton
How much vacant land in Acton is in a flood zone?
87 of 1,851 vacant lots in Acton (5%) are in a FEMA high-risk flood zone (A, AE, AH, AO or VE). 1,173 are zone X with minimal risk and 9 are moderate risk. 582 are zone D, where flood risk has not been studied.
Do I need flood insurance for land in Acton?
Not for an empty lot: flood insurance covers buildings. If you build in a high-risk zone and borrow from a federally regulated lender, flood insurance on the building is required. 5% of Acton's vacant lots are in such a zone.
More for Acton: all vacant land · fire hazard zones
Sources
Counts are LandGrab's analysis of 2026 public data for vacant parcels in Los Angeles County, updated 2026-10-18. Maps change; confirm a specific lot with the county before you buy.