Our Company

Offices & Locations - New Hampshire
Alton

NHSC/GZA GeoEnvironmental, Inc.
291 Main Street
Alton, NH 03809
Phone: 603-875-7645
Fax: 603-875-7646
District Manager: John Murphy
Directions to Alton Office 
Link to Google Map 
Manchester

GZA GeoEnvironmental, Inc.
380 Harvey Road
Manchester, NH 03103
Phone: 603-623-3600
Fax: 603-624-9463
District Manager: James V. Errico
Directions to Manchester Office 
Link to Google Map 
Newmarket

NHSC/GZA GeoEnvironmental, Inc.
The Commons at Kent Place
202 Kent Place
Newmarket, NH 03857
Phone: 603-659-3559
Fax: 603-659-7750
District Manager: John Murphy
Directions to Newmarket Office 
Link to Google Map 

Portsmouth

GZA GeoEnvironmental, Inc.
155 Fleet Street, Ste 314
Portsmouth, NH 03801
Phone (603) 570-4818
Fax: (603) 766-0401
Primary Contact: Gary McAllister
Directions to Portsmouth Office 
Link to Google Map 
Directions to Alton Office

 


Directions to Manchester Office

From the North
Follow I-89 south to I-93 south to Manchester, NH
After toll booth bear right at the I-93/I-293 split, staying on I-93
Take I-293/101 West (splits off to the right)
Take first exit off I-293 (Exit 1, South Willow Street)
At top of ramp, take left at lights - move over to right-hand lanes (left lanes are for Mall traffic) (The Mall of New Hampshire will be on the left)
Follow South Willow Street south past the Mall for approximately 0.7 miles (going through 4 sets of lights)
Bear left at next set of lights following signs for HARVEY ROAD (Fire station will be on your right at the intersection)
Take right at set of lights following signs for HARVEY ROAD
Take the first available LEFT AT BEND IN ROAD into AIRPARK BUSINESS CENTER
Take second driveway on right (traveling down small hill); turn right in parking area
GZA is the first (only) building on the left
Park at any location

From the South
Take Rte 93 North toward Manchester, NH
Take Route I-293/101 West (splits off to the left)
Take first exit off I-293 (Exit 1, South Willow Street)
At top of ramp, take left at lights - move over to right-hand lanes (left lanes are for Mall traffic) (The Mall of New Hampshire will be on the left)
Follow South Willow Street south past the Mall for approximately 0.7 miles (going through 4 sets of lights)
Bear left at next set of lights following signs for HARVEY ROAD (Fire station will be on your right at the intersection)
Take right at set of lights following signs for HARVEY ROAD
Take the first available LEFT AT BEND IN ROAD into AIRPARK BUSINESS CENTER
Take second driveway on right (traveling down small hill); turn right in parking area
GZA is the first (only) building on the left
Park at any location

From Rte 3 North to NH (also known as Everett Turnpike in NH)
Get off at first exit after toll ($1.00) onto Rte 101 East (also signs for Rte 293 East)
Take second exit onto South Willow Street (Exit 1)
Bear to the right up the top of the ramp and stay right (The Mall of New Hampshire will be on the left)
Follow South Willow Street south past the Mall for approximately 0.7 miles (going through 4 sets of lights)
Bear left at next set of lights following signs for HARVEY ROAD (Fire station will be on your right at the intersection)
Take right at next set of lights following signs for HARVEY ROAD
Take the First Available LEFT AT BEND IN ROAD into AIRPARK BUSINESS CENTER
Take second driveway on right (traveling down small hill); turn right in parking area
GZA is the first (only) building on the left
Park at any location
 

Directions to Newmarket Office
 
 

Directions to Portsmouth Office

From I-95 (North or South)
Take I-95 North or South to Exit 7 “Market Street”
At end of ramp, turn east on to Market Street (follow sign to downtown Portsmouth).
Travel 1 mile (stay in left lane) to end of Market Street
Right on to Congress Street – continue to first light.
Right on to Fleet - office entrance immediately on the right.
Entrance to Parking Garage is 200 feet beyond office on the right. 
 

 
 
 
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