303 Thornton St
Portsmouth, NH 03801
3 bd 3 ba 1,565 sqft Built 1860 Lot 8,276 sqft single_family
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 | $575,000 | $381,400 | $956,400 | $11,008 |
| 2023 | $340,500 | $262,000 | $602,500 | $9,718 |
| 2022 | $279,200 | $262,000 | $541,200 | $8,226 |
| 2021 | $300,100 | $262,000 | $562,100 | $8,448 |
| 2020 | $186,000 | $262,000 | $448,000 | $6,586 |
| 2019 | $186,000 | $262,000 | $448,000 | $6,657 |
| 2018 | $165,900 | $238,100 | $404,000 | $6,399 |
| 2017 | $162,100 | $238,100 | $400,200 | $6,155 |
| 2016 | $143,400 | $189,000 | $332,400 | $5,664 |
| 2015 | $143,400 | $189,000 | $332,400 | $5,581 |
| 2014 | $96,800 | $153,600 | $250,400 | $4,532 |
| 2011 | $96,300 | $153,600 | $249,900 | $4,328 |
| 2007 | $110,900 | $126,000 | $236,900 | $3,871 |
Property facts
Year built
1860
Property type
single_family
Stories
2
Beds
3
Baths
3
Living area
1,565 sqft
Lot size
8,276 sqft
ZIP code
03801
City
Portsmouth
Street
Thornton St
Coordinates
43.07412, -70.77507
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 303 Thornton St last sell?
No public-record sale is on file for 303 Thornton St.
What is the current tax assessment for 303 Thornton St?
The most recent total assessment for 303 Thornton St (year 2025) is $956,400 with $11,008 in property tax.
When was 303 Thornton St built?
303 Thornton St was built in 1860.
How does 303 Thornton St compare to others on Thornton St?
We track 8 other properties on Thornton St. Browse the list under "Other properties on Thornton St" to compare beds, baths, and sale history.
What are the property facts for 303 Thornton St?
303 Thornton St is a 3 bed, 3 bath, 1,565 sqft, 8,276 sqft lot single_family.
Is 303 Thornton St a flip candidate?
No — 303 Thornton St does not appear in our flips dataset.
Is 303 Thornton St a tax-appeal candidate?
No — 303 Thornton 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 Thornton St