States › New Hampshire › Merrimack County › ZIP 03230
ZIP code
ZIP 03230
Merrimack County · Concord, NH · New Hampshire
FHFA notes: The FHFA HPI is a broad measure of the movement of single-family house prices. The FHFA HPI is a weighted, repeat-sales index, meaning that it measures average price changes in repeat sales or refinancings on the same properties. FHFA describes its ZIP code indexes as developmental: they may be revised as new data arrive or methods change, and the index does not give a dollar value for any home.
ZIP code 03230 is in Merrimack County, New Hampshire, within the Concord, NH area. FHFA's index for it begins in 2020; through 2025 it stands at 215, meaning prices in repeat sales of the same homes are up +115.4% since 2020.
Over the five years to 2025 the index rose +115.4%, well above the national +47.0%.
Building activity is measured at county level: Merrimack County authorised 456 housing units in the 12 months to August 2026, 2.9 per 1,000 residents, 61% of them single-family.
Same span, five levels
| Change in the FHFA index | ZIP 03230 | Merrimack County | Concord area | New Hampshire | United States |
|---|---|---|---|---|---|
| 1 year (2024–2025) | +24.9% | +4.7% | +4.7% | +4.7% | +2.8% |
| 5 years (2020–2025) | +115.4% | +68.6% | +68.6% | +65.7% | +47.0% |
| 10 years (2015–2025) | — | +116.0% | +116.0% | +113.0% | +85.0% |
| 20 years (2005–2025) | — | +87.3% | +87.3% | +87.2% | +79.1% |
| Since 2000 | — | +216.2% | +216.2% | +206.4% | +158.3% |
| Since 2020 | +115.4% | +68.6% | +68.6% | +65.7% | +47.0% |
| 10-year annualised | — | +8.0% | +8.0% | +7.9% | +6.3% |
| 20-year annualised | — | +3.2% | +3.2% | +3.2% | +3.0% |
Every column uses FHFA's annual all-transactions index family and the same start and end years, so the figures are directly comparable. A dash means the level has no index for that span.
Decade by decade
| Decade | Change | United States | |
|---|---|---|---|
| 2020s so far (2020–2025) | +115.4% | +47.0% |
FHFA reports each index with a value of 100 in its base period, the first year the area has enough transactions (2020 here). A decade's change is the index at the end of the decade divided by the index at the start, so it does not depend on the base year; the United States column covers the same years. Decades before 2020 are not shown.
Peak-to-low declines
Falls of 5% or more from a previous high in the annual index, and the year the earlier peak was regained.
No decline of 5% or more from a peak appears in the annual index for this area.
Building permits in Merrimack County
Permits are reported by county and by permit-issuing place, not by ZIP code. Housing units authorised in Merrimack County, latest 12 months.
Housing units authorised in Merrimack County by month, Sep 2025 to Aug 2026single-family2+ unit buildings
Full permit history and every city in Merrimack County
Other ZIP codes in Merrimack County
Ranked by ten-year change in the FHFA index.
| ZIP | 1 year | 10 years | Since 2000 | Index through |
|---|---|---|---|---|
| 03243 | +5.1% | +158.7% | — | 2025 |
| 03235 | +9.0% | +157.1% | +257.5% | 2025 |
| 03263 | +8.7% | +148.6% | +224.2% | 2025 |
| 03276 | +3.7% | +140.4% | +238.0% | 2025 |
| 03303 | +4.4% | +125.1% | +224.5% | 2025 |
| 03275 | +7.6% | +124.8% | +250.8% | 2025 |
| 03255 | +15.8% | +120.9% | +233.2% | 2025 |
| 03106 | +4.2% | +118.4% | +222.2% | 2025 |
| 03229 | +7.3% | +118.4% | +191.6% | 2025 |
| 03301 | +4.9% | +114.1% | +233.1% | 2025 |
| 03216 | +6.2% | +113.7% | — | 2025 |
| 03234 | +1.3% | +113.4% | +236.4% | 2025 |
All 25 ZIP codes in Merrimack County
Questions and answers
How much have home values in ZIP 03230 risen over 10 years?
FHFA's index for 03230 does not cover a full ten years ending 2025; the change since 2020 is +115.4%.
How does 03230 compare with Merrimack County?
Over the same ten years to 2025, Merrimack County rose +116.0%, New Hampshire +113.0% and the United States +85.0%, against — for the ZIP.
What happened to prices in 03230 after 2007?
The index for 03230 starts in 2020, after the 2007–2009 recession, so it does not record that period.
How many homes are being built in 03230?
Building permits are published by place and county, not by ZIP. Merrimack County authorised 456 housing units in the 12 months to August 2026, +41.6% on the previous 12 months. The county page lists permits by month and by city.
Where does the index for this ZIP come from?
From the Federal Housing Finance Agency's annual five-digit ZIP code house price index (all-transactions), last updated March 31, 2026. FHFA labels the ZIP-level indexes developmental: they are calibrated on appraisal values and sales prices for mortgages bought or guaranteed by Fannie Mae and Freddie Mac, and may be revised. The index tracks price changes for the same homes over time; it does not give a dollar value for any home.
Provenance
Index: Federal Housing Finance Agency, annual house price index for five-digit ZIP codes (all-transactions, developmental), last updated March 31, 2026, values 2020–2025, public domain. County, state and national comparison series are FHFA's annual indexes for those levels from the same release. ZIP to county assignment uses the Census Bureau's 2020 ZCTA-to-county relationship file (largest land share); county to metro uses OMB's July 2023 delineations. Permits: Census Bureau Building Permits Survey through August 2026. Errors in processing are corrected at the next build; see corrections. FHFA HPI datasets.