How Do I Hire A General Contractor Near Me In NH?

To find a good general contractor near me in nh, you want to find someone who will get your town permit, hire licensed electricians and plumbers, and have a written contract stating the scope, price, and time frame prior to any work starting. If they give you evasive answers about any of these three, move on to the next contractor.

By Sean Ryan, Founder · Last updated October 21, 2026

What do general contracting services cover from start to finish?

General contracting services cover everything between "here's what we want" and the final inspection sign-off. We have been in the business since 1995 and the job looks similar on any given project. It includes planning, organizing, constructing, and cleaning up after ourselves.

Here is how the job breaks down, and what responsibilities are left for you:

One thing people underestimate is the selections column. Tile, fixtures, cabinet hardware. If those choices drag, the schedule drags with them. A good GC will hand you a deadline for each one, and you'll want to stick to it.

How does construction management keep a project on schedule?

Construction management keeps a project on schedule by sequencing all trades and making sure that each one has passed inspection before the next one arrives. Sounds easy enough. It isn't.

Think about a typical remodel. The framing has to pass. Then the electrician and plumber rough in their work, and those inspections have to pass too. Then insulation gets inspected. Only after all of that can drywall go up. Skip a step, and the drywall comes back down.

Londonderry's building department logged close to 4,000 scheduled inspections in 2024, according to the town's annual report. Inspectors are busy. A contractor who books them early, and is actually on site when the inspector arrives, saves you days.

Other things that quietly push schedules:

• Lead times. Windows and custom cabinets can take weeks to arrive.

• Weather. Foundation and exterior work in a New Hampshire winter is a different job.

• Decisions. Every late change ripples into the next trade's calendar.

When does a home addition contractor make the most sense?

A home addition contractor is a good idea for situations that require the footprint of the house to change, adding a bedroom or joining new roof lines with the old. Adding on to a house involves many facets of the home including the structure, foundations, and roofs. This can also include all the trades within the walls.

There's also paperwork most people don't see coming. For accessory dwelling units, Londonderry's own instructions spell out that if the new bedroom count goes past what your septic plan was approved for, you'll need a new state-approved septic design before the permit moves forward. That can add real time. We'd rather you hear it from us at the kitchen table than from the building office.

So, do you need a general contractor for a renovation that size? Honestly, yes. You could act as your own GC, but you'd be scheduling half a dozen trades, chasing inspections, and carrying the risk when something goes sideways. You can see past work on our home additions page.

What does a Londonderry permit cost for an addition or remodel?

A Londonderry building permit for an addition or remodel costs a $25 application fee plus $8 per $1,000 of construction value, with a $50 minimum. Those numbers come from the town's current fee schedule, linked from its residential building permits page.

Let's run a quick example. A $120,000 addition would come to $25 plus $960, so about $985 for the building permit. Electrical, plumbing, and mechanical permits are separate and priced on their own.

A couple of other local details:

• Building permits are submitted on paper or by mail, not through the town's online portal.

• Remodels, additions, decks, garages, and sunrooms all use the residential building permit application.

Your GC should handle all of this. If one asks you to pull the permit yourself, that's usually a sign they don't want their name on the job.

Why do general contractor prices vary so much?

General contractor prices are different as each bid contains various elements that add up to the final cost. When you ask how much does a general contractor charge, the answer typically gives a markup of 10 – 20% over the sum of labor, and material costs. This additional markup covers the various expenses such as equipment, subcontractors, permits, insurance, and profits.

It typically covers:

• Liability insurance and workers' comp

• Daily supervision and site visits

• Dumpsters, portable toilets, and site protection

• Permit handling and inspection scheduling

• Fixing problems before you ever see them

A low bid often just leaves some of that out. Ask what's included in writing, line by line. Then compare apples to apples.

How do you vet a general contractor near me in New Hampshire?

Vet the people under the GC, plus insurance and references, since the state doesn't license GCs themselves. Electricians and plumbers must be licensed in New Hampshire, and you can look them up through the state's OPLC licensee lookup.

If you're wondering who manages home projects near Londonderry and Windham New Hampshire, ask every contractor these questions:

• Which licensed electrician and plumber do you use? Can I have their names?

• Can you send a current certificate of insurance?

• Do you have references from jobs in this area?

• Who's my point of contact on a normal day?

Good answers come fast. Fuzzy ones are a warning sign. That's true for general contracting Londonderry NH homeowners hire for a bathroom, and it's doubly true for an addition.

Frequently asked questions

1. What does a general contractor actually handle day to day?

A general contractor is responsible for the day-to-day oversight of the work. From verifying which crews are arriving, reviewing their work, receiving material deliveries, interacting with building inspectors, and keeping you informed. On a busy day, also making sure that an unforeseen issue isn't discovered behind a wall that will hold off the next crew. That should not require your calling four people to find out.

2. Is a general contractor paid a percentage or a fixed fee?

There are pros and cons for both depending on the situation. A fixed rate is usually best on a project where the scope is a bit more clear-cut like an addition with complete drawings. Using the cost-plus method is better for projects where there's more uncertainty on the scope like in an older home. Either way, your contract should make it clear how changes to the project will be handled.

3. Do you need one for a single-room project?

It depends on the scale of your project. Something simple like a room painting or floor replacement only requires a single trade. Adding in a bathroom or kitchen remodel requires a more cohesive blending of plumbing, electrical, tile work, and carpentry. At 3 or more separate trades, a general contractor can save you time and headaches, as well as help avoid issues at work sites.

4. Who carries it when a subcontractor runs late?

The general-contractor. They hired the sub-contractor, and it's the general-contractor's job to make sure that work is performed on time, or if the sub is removed, hire a new one in its place. This is why your contract with the general contractor should make clear the expectations on handling of schedule variances, and how and when you will be notified. Weather and out-of-stock material issues usually do not reflect on the general-contractor.

5. What should the contract cover before work starts?

Scope, total price, payment schedule, start and completion dates, and change order procedure, are the basics that should be covered. Also, who is responsible for pulling permits, what work is excluded, cleanup requirements, and any warranty for work performed. Any other items you feel are a good idea to be included in your contract should be added prior to work beginning.

6. Will you handle the building permit for me?

Yes, we will pull the required permits and schedule inspections for you. We will also compile the drawings and any documents that town officials might need. Having your contractor pull the permits keeps responsibility for compliance with regulations in the right place.

7. How far ahead should I book a contractor?

A few months in advance on bigger projects is a good rule of thumb. If you're building a home or doing a major addition, you want to schedule around the clock during the spring and summer months. Smaller scale projects can be scheduled for earlier in the year.

8. Can we live in the house during a remodel?

Most people do stay, though it's a good idea to make a schedule that has some buffer around when the kitchen and bathroom are closed off and unavailable for use. During a big project or addition that merges into the main structure, some families with children find it best to stay elsewhere for a week or two.

Where can you book a general contractor in Londonderry?

You can book a general contractor in Londonderry by calling Sean Ryan & Son at 603-362-8230 or texting 603-300-6214 for a free quote. We'll walk the space with you, talk through budget and timing, and give you a straight answer. Learn more about our general contractor services and our work in Londonderry, or reach us through our contact page.

Visit or Call Us

Sean Ryan & Son Carpentry & General Contracting (Serving New Hampshire since 1995) 1 Pheasant Lane, Atkinson, NH 03811 Call: 603-362-8230 Text: 603-300-6214 Email: [email protected] Service area: Londonderry, Windham, Derry, Atkinson, Auburn, Raymond, Epping, Exeter, Hampton, Seabrook, and Portsmouth