621 Islington St
Portsmouth, NH 03801
3 bd 3 ba 1,710 sqft Built 1900 Lot 15,246 sqft condos
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 | $585,200 | — | $585,200 | $6,736 |
| 2023 | $393,700 | — | $393,700 | $6,350 |
| 2022 | $393,700 | — | $393,700 | $5,984 |
| 2021 | $393,700 | — | $393,700 | $5,917 |
| 2020 | $393,700 | — | $393,700 | $5,787 |
| 2019 | $420,000 | — | $420,000 | $6,241 |
Property facts
Year built
1900
Property type
condos
Stories
2
Beds
3
Baths
3
Living area
1,710 sqft
Lot size
15,246 sqft
ZIP code
03801
City
Portsmouth
Street
Islington St
Coordinates
43.07096, -70.77119
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 621 Islington St last sell?
No public-record sale is on file for 621 Islington St.
What is the current tax assessment for 621 Islington St?
The most recent total assessment for 621 Islington St (year 2025) is $585,200 with $6,736 in property tax.
When was 621 Islington St built?
621 Islington St was built in 1900.
How does 621 Islington St compare to others on Islington St?
We track 8 other properties on Islington St. Browse the list under "Other properties on Islington St" to compare beds, baths, and sale history.
What are the property facts for 621 Islington St?
621 Islington St is a 3 bed, 3 bath, 1,710 sqft, 15,246 sqft lot condos.
Is 621 Islington St a flip candidate?
No — 621 Islington St does not appear in our flips dataset.
Is 621 Islington St a tax-appeal candidate?
No — 621 Islington 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 Islington St