Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. Every office link was opened and checked against the office's own site between September 24, 2026 and October 2, 2026.
Portsmouth, New Hampshire, in Rockingham County, has about 23,000 residents (2024 Census Bureau estimate). The title to a parcel in Portsmouth is in the deed records of the Registry of Deeds and its taxable value is set by the town assessor; what is built on it is a matter for the city. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits and records, evictions and court cases, records requests and common questions.
Related guides: Portsmouth public records, Rockingham County property records, Portsmouth arrest records, Portsmouth warrants, Portsmouth inmate search, Portsmouth criminal records, New Hampshire arrest records and New Hampshire inmate search.
Deeds, Mortgages and Liens in Portsmouth
Who owns a parcel in Portsmouth and what it sold for are in the deed records of the Registry of Deeds, with every lien or mortgage against the land.
SearchSystems opened and checked the Registry of Deeds' page at nhdeeds.org/rockingham-county-searching-records (page title: Rockingham County | Searching Records), phone (603)642-5526, Monday through Friday8:00 am - 4:00 pm, which answered when SearchSystems opened it on September 28, 2026.
Assessed Values and the Tax Roll in Portsmouth
The value each parcel is taxed on is set by the town assessor, not the county. New Hampshire towns, not counties, assess property and revalue at least every five years; the county Registry of Deeds records the deeds.
Permits and City Records in Portsmouth
Building permits, zoning and code cases are the city's own. For Portsmouth, SearchSystems opened and checked the city hall page at portsmouthnh.gov (page title: City of Portsmouth, NH | Official Government Website & Community Resources), which answered when SearchSystems opened it on September 26, 2026.
The city clerk's page SearchSystems verified is at portsmouthnh.gov/cityclerk (page title: City Clerk's Office | City of Portsmouth), phone 603-610-7207, Monday 8:00 AM - 6:00 PM, which answered when SearchSystems opened it on September 26, 2026.
Evictions and Court Cases About Land in Portsmouth
Court cases about land from Portsmouth, evictions among them, are filed in the Circuit Court or the Rockingham County Superior Court.
Asking a County Office for a Record
Under the New Hampshire Right-to-Know Law a county office must answer a request within 5 business days, and it may charge the actual cost of copying.
Frequently Asked Questions
Who records deeds in Portsmouth?
The Registry of Deeds, at nhdeeds.org, phone (603)642-5526. Deeds, mortgages and liens on land in Portsmouth are filed there.
Who sets the assessed value of a property in Portsmouth?
The assessor of each town.
Where are evictions from Portsmouth filed?
In the Circuit Court. The file is public unless the court seals it.
How is property assessed in New Hampshire?
New Hampshire towns, not counties, assess property and revalue at least every five years; the county Registry of Deeds records the deeds.
Is this the official Portsmouth website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.