Office Space at 100 Borthwick Ave in Portsmouth

Conveniently located directly off US Route 1 and Exit 3 of I-95.

Professional Office Office Space for Rent

5 Spaces Available

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Workspace

(Suite 110) 100 Borthwick Ave., Portsmouth, NH

Size

2,084 ^SF

Can fit*

1 - 17 ^PPL

Price

$4,863 ^/MO

Workspace

(Suite 120) 100 Borthwick Ave., Portsmouth, NH

Size

3,526 ^SF

Can fit*

1 - 33 ^PPL

Price

$8,227 ^/MO

Workspace

(Suite 180) 100 Borthwick Ave., Portsmouth, NH (copy)

Size

900 ^SF

Can fit*

1 - 7 ^PPL

Price

$2,100 ^/MO

Workspace

(Suite 250) 100 Borthwick Ave., Portsmouth, NH

Size

2,215 ^SF

Can fit*

1 - 15 ^PPL

Price

$5,168 ^/MO

Workspace

(Suites 110 & 120) 100 Borthwick Ave., Portsmouth, NH

Size

5,610 ^SF

Can fit*

1 - 45 ^PPL

Price

$13,090 ^/MO

*OfficeSpace.com is suggesting this space is suitable for the listed amount of people, based on a calculation of 1 person = 125 SF.

Property Details

Property Type

Office

Property Size

47,745 sqft

Last Updated

3/18/2026

Landlord's Leasing Agent Representative

Kent White

(603) 570-2699

Professional Office location

City

Portsmouth

Zip Code

03801