Share This Listing

Message

961 characters remaining

Hmm, there seems to have been an error sending your message. Please try again.

Your email has been sent.

Still interested?

Contact the brokers for more information about this property

100 Borthwick Ave 2,215 - 16,014 SF of Office Space Available in Portsmouth, NH 03801

Save this listing!

Favorite this listing to get notified of price updates, new media and more

HIGHLIGHTS

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

ALL AVAILABLE SPACES(4)

Display Rental Rate as

  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 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 140 & 150
  • 3,322-7,433 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $208,124 /YR $17,344 /MO
  • Office
  • -
  • Now
  • Lease rate does not include utilities, property expenses or building services
  • 1st Floor, Ste 160
  • 2,840 SF
  • Negotiable
  • $28.00 /SF/YR $2.33 /SF/MO $79,520 /YR $6,627 /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 120 3,526 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $98,728 /YR $8,227 /MO Office - Now
1st Floor, Ste 140 & 150 3,322-7,433 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $208,124 /YR $17,344 /MO Office - Now
1st Floor, Ste 160 2,840 SF Negotiable $28.00 /SF/YR $2.33 /SF/MO $79,520 /YR $6,627 /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 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 140 & 150

Size
3,322-7,433 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $208,124 /YR $17,344 /MO
Space Use
Office
Condition
-
Available
Now

1st Floor, Ste 160

Size
2,840 SF
Term
Negotiable
Rental Rate
$28.00 /SF/YR $2.33 /SF/MO $79,520 /YR $6,627 /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 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 140 & 150

Size 3,322-7,433 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 160

Size 2,840 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 2,215± SF to 7,433± 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.

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
  • Listing ID: 33377168

  • Date on Market: 9/15/2025

  • Last Updated:

  • Address: 100 Borthwick Ave, Portsmouth, NH 03801

Link copied
Your LoopNet account has been created!

Please Share Your Feedback

We welcome any feedback on how we can improve LoopNet to better serve your needs.
X
{{ getErrorText(feedbackForm.starRating, "rating") }}
255 character limit ({{ remainingChars() }} charactercharacters remainingover)
{{ getErrorText(feedbackForm.msg, "rating") }}
{{ getErrorText(feedbackForm.fname, "first name") }}
{{ getErrorText(feedbackForm.lname, "last name") }}
{{ getErrorText(feedbackForm.phone, "phone number") }}
{{ getErrorText(feedbackForm.phonex, "phone extension") }}
{{ getErrorText(feedbackForm.email, "email address") }}