Top-rated structural engineers.

Get matched with top structural engineers in Londonderry, NH

Enter your ZIP and get matched with up to 5 pros

Need a pro for your structural engineering project in Londonderry, NH?

Select your specific project to find the pro for you.

Verified Reviews for Structural Engineering pros in Londonderry, NH

*The Angi rating for Structural Engineering companies in Londonderry, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Structural Engineering needs.

*The HomeAdvisor rating for Structural Engineering companies in Londonderry, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Structural Engineering needs.

Last update on October 27, 2025

Find Structural engineers in Londonderry

Avatar for Groundworks

Groundworks

33 W Bacon Street
3.71(
217
)
•Approved Pro

Groundworks

33 W Bacon Street
3.71(
217
)
•Approved Pro
Customers say: Super punctual
35 local quotes requested
41 years of experience

Groundworks, previously Busy Dog Basement Technologies, specializes in helping homeowners with their waterproofing, foundation repair, crawl space, and remodeling needs. Our top priority is providing high-quality home repair solutions and personalized service across Massachusetts and Rhode Island. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement. MA HIC 164895

"John McLaughlin or w.e his name should be embarrassed on how he treats his customers and workers ."

Mike P on September 2025

Groundworks, previously Busy Dog Basement Technologies, specializes in helping homeowners with their waterproofing, foundation repair, crawl space, and remodeling needs. Our top priority is providing high-quality home repair solutions and personalized service across Massachusetts and Rhode Island. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement. MA HIC 164895

"John McLaughlin or w.e his name should be embarrassed on how he treats his customers and workers ."

Mike P on September 2025

Avatar for Ivan Filev

Ivan Filev

PO Box 201
No reviews yet

Ivan Filev

PO Box 201
No reviews yet
39 years of experience

Structural Engineer based in Boston, providing consulting services to architects, developers, contractors, builders, institutions, and property owners throughout New England, New York, New Jersey, Pennsylvania, Florida and California.

Structural Engineer based in Boston, providing consulting services to architects, developers, contractors, builders, institutions, and property owners throughout New England, New York, New Jersey, Pennsylvania, Florida and California.

Nick Burtt Home Improvements LLC

5.00(
2
)

Nick Burtt Home Improvements LLC

5.00(
2
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Family owned and operated general contractor. Providing all levels of construction from foundation to finish. Professional, on time and on budget. Call us today for a free estimate to start your next project.

Family owned and operated general contractor. Providing all levels of construction from foundation to finish. Professional, on time and on budget. Call us today for a free estimate to start your next project.

EHM

Washington Ave.
4.50(
16
)

EHM

Washington Ave.
4.50(
16
)
Customers say: Quality work
71 years of experience

EHM is a structural moving and elevating company that also specializes in foundation repair and replacement. We have been working in the Midwest since the Great Floods of 1993. We specialize in severely comprised foundation issues. We can elevate, level, pier or replace a wall or your entire foundation. We do not do mudjacking, waterproofing or minor crack repair.

"I did not get the service that we originally talked about I am very unhappy"

Donna S on August 2021

EHM is a structural moving and elevating company that also specializes in foundation repair and replacement. We have been working in the Midwest since the Great Floods of 1993. We specialize in severely comprised foundation issues. We can elevate, level, pier or replace a wall or your entire foundation. We do not do mudjacking, waterproofing or minor crack repair.

"I did not get the service that we originally talked about I am very unhappy"

Donna S on August 2021

JJ Calnan and sons Contractors

17 Reservoir Road
4.25(
4
)

JJ Calnan and sons Contractors

17 Reservoir Road
4.25(
4
)
Customers say: Terrific value
39 years of experience

JJ Calnan and sons Contractors is a family owned and operated business. With our total time in the construction industry, working for others and in business for ourselves, we have over 100 years experience. Our employees are longtime. loyal, dedicated and highly skilled. We can provide hundreds of references from homeowners, business owners, industry, religious institutions & municipalities. We are fully insured and liscensed. Our prices are very competitive and fair. We honor our Veterans who receive 10% discount. Contact John at [email protected]

JJ Calnan and sons Contractors is a family owned and operated business. With our total time in the construction industry, working for others and in business for ourselves, we have over 100 years experience. Our employees are longtime. loyal, dedicated and highly skilled. We can provide hundreds of references from homeowners, business owners, industry, religious institutions & municipalities. We are fully insured and liscensed. Our prices are very competitive and fair. We honor our Veterans who receive 10% discount. Contact John at [email protected]

Showing 1-10 of 12
Structural Engineering questions, answered by experts

The 10 10 rule describes the formula most contractors use to determine how much to charge for a job. Allowing for 10% overhead above the total projected cost to do the work and 10% profit sets a contractor up for success, even if there are delays or other problems on the project. This formula isn’t a hard-and-fast rule, but it is a ballpark figure to begin with when estimating your expenses on a job.

Because of their composite structure, cutting or drilling LVL beams can compromise their integrity. We strongly advise contacting a general contractor or structural engineer before making any alterations to LVL beams. Professionals can also answer questions about choosing between a pier and beam versus slab foundation when designing your project.

Costs depend on furniture type, size, complexity, and whether additional modifications are needed.

Many horizontal cracks in home foundations result from water and soil pressure from outside of the building or from a footing that is shifting. Under those circumstances, horizontal cracks are a structural problem that requires repair before they become worse and more difficult to fix. However, in very specific cases, thin horizontal cracks may simply be a cosmetic blemish due to concrete shrinkage.

Yes, an LVL beam is more affordable than the cost of a steel I-beam, totaling between $50 and $200 per linear foot as opposed to the $100 to $400 per linear foot you’d pay for a steel I-beam. Not only is the wood material more affordable than steel, but it’s also more similar to traditional wooden beams and doesn’t require as much retrofitting to connect joists.

The Londonderry, NH homeowners’ guide to structural engineering services

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

See all articles

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"