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25 South Mill Street, Portsmouth, NH, 03801 | $1,850,000
Welcome to 25 South Mill Street — a rare offering of newer construction (built in 2013) located on the waterfront in one of Portsmouth’s most sought-after neighborhoods. Currently set up as a 2 family home this would be a fairly straight forward conversion to a true single family property in a premier location. Each of the two units features 2 bedrooms, 1 full bath, and in-unit laundry, offering comfortable, modern living with a coastal flair. The upper unit enjoys elevated views and higher ceilings, maximizing light and enhancing the stunning water vistas. Outdoors, you'll find no shortage of parking with a deep, oversized garage (approx. 14' x 26') and a driveway that accommodates 6+ vehicles — an exceptional amenity for South End living. With flexible use options, this property is ideal for an owner-occupant looking to offset their costs with rental income, investors seeking a premium location asset, or those envisioning a condo conversion or conversion to a single-family residence. The upper unit will be vacant by end of July 2025, while the lower unit is leased through April 2026, providing both immediate flexibility and reliable income. Don’t miss this exceptional opportunity in the heart of the South End — just a short stroll to downtown Portsmouth, Prescott Park, and the city’s vibrant waterfront scene.
Features
- Rooms: 8
- Bedrooms: 4
- Baths: 2 full
- Style: Colonial
- Year Built: 2013
- Garage: 1-car Garage
- Heating: Hot Water
- Cooling: None
- Basement: Unfinished
- Approx Sq. Feet: 1,760
- Acreage: 0.12
- Est. Taxes: $14,253
- Lot Desc: City Lot
- Elem. School: Little Harbor School
- Middle School: Portsmouth Middle School
- High School: Portsmouth High School
- School District: Portsmouth
- MLS#: 5073793
- Website: https://www.raveis.com
/eprop/5073793/25southmillstreet_portsmouth_nh?source=qrflyer
This information is deemed reliable, but not guaranteed. The data relating to real estate displayed on this Site comes in part from the IDX Program of PrimMLS. The information being provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated 2/14/2026Listing courtesy of Great Island Realty LLC Phone: 603-433-3350
Listing Agent: Emil Uliano
William Raveis Family of Services
Our family of companies partner in delivering quality services in a one-stop-shopping environment. Together, we integrate the most comprehensive real estate, mortgage and insurance services available to fulfill your specific real estate needs.
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888.699.8876
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Frank KolbSenior Vice President - Coaching & Strategic, William Raveis Mortgage, LLC
NMLS Mortgage Loan Originator ID 81725
203.980.8025
Frank.Kolb@raveis.com
Our Executive Mortgage Banker:
- Is available to meet with you in our office, your home or office, evenings or weekends
- Offers you pre-approval in minutes!
- Provides a guaranteed closing date that meets your needs
- Has access to hundreds of loan programs, all at competitive rates
- Is in constant contact with a full processing, underwriting, and closing staff to ensure an efficient transaction
Joel FanjoyRegional SVP Insurance Sales, William Raveis Insurance
617.320.5687
Joel.Fanjoy@raveis.com
Our Insurance Division:
- Will Provide a home insurance quote within 24 hours
- Offers full-service coverage such as Homeowner's, Auto, Life, Renter's, Flood and Valuable Items
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Encompass, Travelers, Fireman's Fund, Middleoak Mutual, One Beacon and American Reliable
25 South Mill Street, Portsmouth, NH, 03801
$1,850,000
Customer Service
William Raveis Real Estate
Phone: 888.699.8876
Contact@raveis.com
Frank Kolb
Senior Vice President - Coaching & Strategic
William Raveis Mortgage, LLC
Phone: 203.980.8025
Frank.Kolb@raveis.com
NMLS Mortgage Loan Originator ID 81725
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5/6 (30 Yr) Adjustable Rate Jumbo* |
30 Year Fixed-Rate Jumbo |
15 Year Fixed-Rate Jumbo |
|
|---|---|---|---|
| Loan Amount | $1,480,000 | $1,480,000 | $1,480,000 |
| Term | 360 months | 360 months | 180 months |
| Initial Interest Rate** | 4.875% | 5.750% | 5.500% |
| Interest Rate based on Index + Margin | 8.125% | ||
| Annual Percentage Rate | 5.925% | 5.858% | 5.681% |
| Monthly Tax Payment | $1,188 | $1,188 | $1,188 |
| H/O Insurance Payment | $125 | $125 | $125 |
| Initial Principal & Interest Pmt | $7,832 | $8,637 | $12,093 |
| Total Monthly Payment | $9,145 | $9,950 | $13,406 |
* The Initial Interest Rate and Initial Principal & Interest Payment are fixed for the first and adjust every six months thereafter for the remainder of the loan term. The Interest Rate and annual percentage rate may increase after consummation. The Index for this product is the SOFR. The margin for this adjustable rate mortgage may vary with your unique credit history, and terms of your loan.
** Mortgage Rates are subject to change, loan amount and product restrictions and may not be available for your specific transaction at commitment or closing. Rates, and the margin for adjustable rate mortgages [if applicable], are subject to change without prior notice.
The rates and Annual Percentage Rate (APR) cited above may be only samples for the purpose of calculating payments and are based upon the following assumptions: minimum credit score of 740, 20% down payment (e.g. $20,000 down on a $100,000 purchase price), $1,950 in finance charges, and 30 days prepaid interest, 1 point, 30 day rate lock. The rates and APR will vary depending upon your unique credit history and the terms of your loan, e.g. the actual down payment percentages, points and fees for your transaction. Property taxes and homeowner's insurance are estimates and subject to change.
William Raveis Mortgage, LLC, NMLS ID 2630, 7 Trap Falls Road, Shelton, CT 06484
NH Mortgage Banker #11083-MB