A flood-zone label only becomes useful when it is tied to the correct map, effective date and location on the property. AE and X refer to different mapped hazard categories, but neither a town summary nor a listing's shorthand can settle the risk or insurance cost for the building you intend to buy.
What is the basic distinction between AE and X?
AE identifies a mapped high-hazard flood area with base flood elevations determined. X can describe areas outside the special high-hazard area, with shaded and unshaded distinctions that should be read from the map legend. A label does not mean that flooding is impossible or that every part of a parcel shares the same designation. Locate the building and relevant site features on the effective map and seek clarification from the local floodplain official or the appropriate professional where boundaries are close or unclear.
Why does map coverage matter before interpreting a result?
The town summaries below distinguish current digital coverage from older mapping and unavailable records. An older map is not a current digital determination, and missing coverage is not evidence of no flood exposure. The age, scale and completeness of the source affect what the result can establish. Also keep parcel boundaries separate from the building footprint: a parcel-level intersection can identify a question without proving exactly how the structure is affected.
How should insurance and a purchase decision be checked?
Obtain an address-specific insurance quote and confirm lender requirements using the actual transaction information. Flood-zone category alone does not produce a reliable premium. Ask about the building, elevation information, coverage, deductibles and any relevant map changes. Review site drainage and available property history separately from the mapped category. The buyer needs a complete picture of the record and costs, not a binary assurance derived from a single letter or a map result with uncertain coverage.
What does the local record show?
These towns provide local context for the decision in this article. The figures describe the published records and survey periods identified below. Compare the same measures across places, then confirm the details of any actual home before using them in a budget or offer.
Local Figures for This Decision
Download CSV, same columns, same definitions
Selected municipalities, shown alphabetically. Definitions below distinguish assessments, administrative benchmarks and survey estimates from current market quotes.
| Town | Town Flood-map Record | Median Lot Acres | Single-family Assessment |
|---|---|---|---|
| Chester | Mapped zones present | 2.2 | $214,100 |
| Northampton | Older flood map only | 0.34 | $504,350 |
| Springfield | Mapped zones present | 0.17 | $267,900 |
What These Columns Mean
- Town
- Municipality; follow its record below for the full data and address check.
- Town Flood-map Record
- Town-level coverage, not a determination for any property. Older maps are a separate source from the current digital map. An unavailable map or no intersection in a town summary never proves that an address cannot flood.
- Median Lot Acres
- Median recorded single-family parcel acreage. Lot area is not a measure of buildable, dry or accessible land and does not establish a surveyed boundary.
- Single-family Assessment
- Median assessed value of single-family parcels. This is a tax-roll statistic, not an asking price, appraisal or median sale price. Assessment years are identified in the sources.
Cite: RE413. “Local Figures for This Decision.” Updated September 19, 2026. https://www.re413.com/news/flood-zone-ae-vs-x-massachusetts/, underlying sources at https://www.re413.com/sources/.
Chester's town record. Town flood-map record: Mapped zones present. Median lot acres: 2.2. Single-family assessment: $214,100.
Northampton's town record. Town flood-map record: Older flood map only. Median lot acres: 0.34. Single-family assessment: $504,350.
Springfield's town record. Town flood-map record: Mapped zones present. Median lot acres: 0.17. Single-family assessment: $267,900.
What should you check next?
- Confirm the effective map, legend and building location, including whether X is shaded or unshaded.
- Keep older and unavailable mapping distinct from a current property-specific determination.
- Obtain an insurance quote and lender requirements, and investigate elevation or boundary questions with the appropriate local official.
Keep the address, document date and source alongside each answer. If records disagree, identify which period and property each describes before treating the difference as a change. A missing result leaves a question open; it does not establish that a property has no problem or no cost.
Where can you continue the comparison?
Browse all housing guides by subject.
Open the linked town records for the wider context, including sources and dates. Use the property-specific records to narrow a decision, and keep current quotes separate from the historical figures used to explain it here.
Which official guidance supports this article?
- FEMA FloodSmart: flood zones and maps. Guidance checked 2026-09-05; confirm current requirements for your transaction.
- MassGIS: FEMA digital flood-map definitions and coverage. Guidance checked 2026-09-05; confirm current requirements for your transaction.
- FEMA: flood-zone definitions. Guidance checked 2026-09-05; confirm current requirements for your transaction.
Sources
- FEMA and MassGIS, flood mapping summaries. town flood-map record. Checked 2026-08-21.
- FEMA and MassGIS, older flood maps. town flood-map record. Checked 2026-08-21.
- MassGIS and municipal assessors. median lot acres, single-family assessment. Figures through Chester: FY2025; Northampton: FY2026; Springfield: FY2026. Checked 2026-08-21.
"Figures through" is the period the publisher's data describes; "checked" is only when we last asked. The full sourcing: sources and method.