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Find Demolition pros in Portsmouth

Avatar for Granite State Demolition LLC
Granite State Demolition LLC
5.0(
18
)

Serving Portsmouth, NH and surrounding areas

Angi Approved

In business since 2023

Emergency services offered

Small jobs welcome

"Scott and Ryan were on time and were done in about 4 hrâ s. They were hard working and courteous. I would definitely choose them again for another job."
Wheelock House
Wheelock House
Wheelock House
Wheelock House
Wheelock House

+19

Response time6 hrs
Response rate88%
2 neighbors recently requested a quote
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Avatar for Morton Excavation
Morton Excavation
4.9(
11
)

Serving Portsmouth, NH and surrounding areas

Angi Approved

In business since 2016

Free estimates

Small jobs welcome

"I highly recommend Morton Excavations. They did an excellent job, completed the work quickly, and were very professional throughout the entire process."
Gallery
Fire Hydrant install
8in ductile iron / fire hydrant install
Culvert Drainage
Culvert Drainage

+11

5 neighbors recently requested a quote
Recommended by63%of homeowners
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Avatar for North Star Demolition
North Star Demolition
4.5(
105
)

Serving Portsmouth, NH and surrounding areas

Angi Approved

In business since 2000

Free estimates

Credit card accepted

"The chimney removal went smoothly. Added other work to include the removal of shrubs and other yard debris. Finished everything off with a truckload of pavers delivered to my home for re-use. Will wait till the spring to have them laid down."
Response time10 mins
4 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for JW's Landscape Construction, LLC
JW's Landscape Construction, LLC
4.7(
38
)

Serving Portsmouth, NH and surrounding areas

Angi Approved

In business since 2001

Free estimates

Emergency services offered

"JWs Landscape worked with me to clear my property of overgrown gardens, trees, etc to prep it for a lawn. They communicated with me throughout the entire process as I was not always on site. They were very accommodating of changes and requests I made as the work was being done."
Paver driveway drainage failing
Old fronty entry
New Home with no walkway
Building a stone wall on the water in Dover
Landscape timbers falling down

+221

10 neighbors recently requested a quote
Recommended by94%of homeowners
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Avatar for CZMGT LLC
CZMGT LLC
5.0(
2
)

Serving Portsmouth, NH and surrounding areas

Angi Approved

In business since 2017

Free estimates

Emergency services offered

"We hired Christian to remove tree stumps on our property. He gave us a price the next day and started work within a week. His work ethic is incredible—he left the site spotless and communicated clearly every step of the way. Since then, he’s regraded our driveway, removed an old chicken coop, and cleared brush. It’s safe to say Christian is our go-to contractor now."
Pine removal
Response time8 hrs
3 neighbors recently requested a quote
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FAQs for demolition projects in Portsmouth, NH

To determine if a wall is load-bearing, start by checking your home’s original plans or asking a structural engineer. Exterior walls always carry weight, but interior ones only do if they sit over a beam or run perpendicular to floor joists. If a wall lines up with posts in the basement or falls directly under the roof ridge, assume it’s load-bearing and call a professional before attempting to remove it with a sledgehammer.

Calculating the wall load and sizing the beam must be performed by experts to ensure structural safety. You need a structural engineer to evaluate all load aspects and determine the proper beam dimensions. A professional engineer performs precise calculations and advises on any necessary enhancements, such as larger footings for support. An inspector then verifies that the revised structure meets all safety and code regulations before the finishing work begins.

Hiring a structural engineer is essential for ensuring your home remains structurally sound during any major renovation. Their responsibility is to deliver expert assessments and design recommendations for load-bearing modifications. The average cost to hire a structural engineer is $500, with rates ranging from $350 to $800. Consulting a licensed, experienced engineer guarantees that every structural project, whether constructing a new home or remodeling an existing one, is completed safely and efficiently.

Almost all load-bearing wall removals require a permit as they support everything above it, and building departments want proof that the new beam can handle the weight. Pulling a permit triggers plan review and inspections that confirm the work meets local code and safety standards. Skipping this step can lead to fines or being forced to rebuild later, so have your contractor pull the permit before work starts.

Removing a load-bearing wall to create an entrance for a carport or covered patio is a task that comes with defined cost implications. This modification requires extra structural adjustments to ensure safety and proper integration with the adjoining space. When you convert a wall into an entryway, you can expect to pay between $3,200 and $9,500, with an average cost of $6,400. The additional work required for this conversion reinforces the home’s integrity and ensures compliance with applicable building codes.

The Portsmouth, NH homeowners’ guide to demolitions

From average costs to expert advice, get all the answers you need to get your job done.

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