425 Union St
Portsmouth, NH 03801
2 bd 1 ba 995 sqft Built 1900 condo
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $538,700 | — | $538,700 | $6,200 |
| 2023 | $374,900 | — | $374,900 | $6,047 |
| 2022 | $374,900 | — | $374,900 | $5,698 |
| 2021 | $374,900 | — | $374,900 | $5,635 |
| 2020 | $374,900 | — | $374,900 | $5,511 |
| 2019 | $374,900 | — | $374,900 | $5,571 |
| 2018 | $348,900 | — | $348,900 | $5,527 |
| 2017 | $360,900 | — | $360,900 | $5,551 |
Property facts
Year built
1900
Property type
condo
Stories
3
Beds
2
Baths
1
Living area
995 sqft
Lot size
—
ZIP code
03801
City
Portsmouth
Street
Union St
Coordinates
43.06787, -70.76272
Comparable properties nearby
Frequently asked questions
When did 425 Union St last sell?
No public-record sale is on file for 425 Union St.
What is the current tax assessment for 425 Union St?
The most recent total assessment for 425 Union St (year 2025) is $538,700 with $6,200 in property tax.
When was 425 Union St built?
425 Union St was built in 1900.
How does 425 Union St compare to others on Union St?
We track 8 other properties on Union St. Browse the list under "Other properties on Union St" to compare beds, baths, and sale history.
What are the property facts for 425 Union St?
425 Union St is a 2 bed, 1 bath, 995 sqft condo.
Is 425 Union St a flip candidate?
No — 425 Union St does not appear in our flips dataset.
Is 425 Union St a tax-appeal candidate?
No — 425 Union St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+0.5%
Implied 1-yr
+2.1%
2026 Q3
$1.3M
2026 Q4
$1.31M
ZIP 03801 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St