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Highlights

  • Ample on-site parking
  • Generous Tenant Improvement Allowance of $75.00/SF!
  • Excellent visibility and signage potential

All Available Spaces(5)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Condition
  • Available
  • 1st Floor, Ste 110
  • 2,084 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $58,352 /YR $4,863 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
  • 1st Floor, Ste 110 & 120
  • 5,610 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $157,080 /YR $13,090 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
  • 1st Floor, Ste 120
  • 3,526 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $98,728 /YR $8,227 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
  • 1st Floor, Ste 180
  • 900 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $25,200 /YR $2,100 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
  • 2nd Floor, Ste 250
  • 2,215 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $62,020 /YR $5,168 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
Space Size Term Rental Rate Space Use Condition Available
1st Floor, Ste 110 2,084 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $58,352 /YR $4,863 /MO Office - Now
1st Floor, Ste 110 & 120 5,610 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $157,080 /YR $13,090 /MO Office - Now
1st Floor, Ste 120 3,526 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $98,728 /YR $8,227 /MO Office - Now
1st Floor, Ste 180 900 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $25,200 /YR $2,100 /MO Office - Now
2nd Floor, Ste 250 2,215 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $62,020 /YR $5,168 /MO Office - Now

1st Floor, Ste 110

Size
2,084 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $58,352 /YR $4,863 /MO
Space Use
Office
Condition
-
Available
Now

1st Floor, Ste 110 & 120

Size
5,610 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $157,080 /YR $13,090 /MO
Space Use
Office
Condition
-
Available
Now

1st Floor, Ste 120

Size
3,526 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $98,728 /YR $8,227 /MO
Space Use
Office
Condition
-
Available
Now

1st Floor, Ste 180

Size
900 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $25,200 /YR $2,100 /MO
Space Use
Office
Condition
-
Available
Now

2nd Floor, Ste 250

Size
2,215 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $62,020 /YR $5,168 /MO
Space Use
Office
Condition
-
Available
Now

1st Floor, Ste 110

Size 2,084 SF
Term Negotiable
Rental Rate $28.00 /SF/YR
Space Use Office
Condition -
Available Now

  • Lease rate does not include utilities, property expenses or building services

1st Floor, Ste 110 & 120

Size 5,610 SF
Term Negotiable
Rental Rate $28.00 /SF/YR
Space Use Office
Condition -
Available Now

  • Lease rate does not include utilities, property expenses or building services

1st Floor, Ste 120

Size 3,526 SF
Term Negotiable
Rental Rate $28.00 /SF/YR
Space Use Office
Condition -
Available Now

  • Lease rate does not include utilities, property expenses or building services

1st Floor, Ste 180

Size 900 SF
Term Negotiable
Rental Rate $28.00 /SF/YR
Space Use Office
Condition -
Available Now

  • Lease rate does not include utilities, property expenses or building services

2nd Floor, Ste 250

Size 2,215 SF
Term Negotiable
Rental Rate $28.00 /SF/YR
Space Use Office
Condition -
Available Now

  • Lease rate does not include utilities, property expenses or building services

Property Overview

Quality office spaces ranging from 900± SF to 5,610± SF, offering flexible layouts that include private offices, open collaborative areas, conference rooms, and kitchenettes. Join a thriving professional corridor—neighboring tenants include Portsmouth Regional Hospital, Liberty Mutual, Highliner Foods, and a variety of medical users. Conveniently located directly off US Route 1 and Exit 3 of I-95.

  • Banking
  • Signage

Property Facts

Building Type
Office
Year Built/Renovated
1978/2005
Building Height
3 Stories
Building Size
47,745 SF
Building Class
B
Typical Floor Size
16,014 SF
Parking
Surface Parking
Fairly walkable
40/100
Exceptionally drivable
100/100
Somewhat bikeable
30/100
  • Listing ID: 33377168

  • Date on Market: 3/18/2026

  • Last Updated:

  • Address: 100 Borthwick Ave, Portsmouth, NH 03801

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