Concrete Contractor in Londonderry, NH - Driveways and Slabs Built on a Packed Base
Quality Merrimack Concrete is a concrete contractor based in Merrimack that pours driveways, patios, walks, garage floors, footings and foundations for homes and businesses in Londonderry, NH, with the base dug out and packed first.
- Licensed and insured.
- Free in-person estimates.
- We reply within 1 business day.
Londonderry homes and the concrete work they need
Londonderry is mostly houses on their own lots, many with an attached garage, a long driveway and a patio off the back, with a shed or barn out back on plenty of them and businesses with lots and walks to keep up. The calls we get here follow from that. It's a driveway that's dropped at the garage door, a patio pulling away from the house, a front walk that's heaved, or a pad for a new shed. It's a lot like the work we do over in Hudson, a short drive from our base in Merrimack.
On lots like these, the job usually turns on what the old slab was sitting on and which way the yard sends its water. I can read the drainage on the first visit, but I won't know for sure what's under the old concrete until it comes up.
Concrete services for Londonderry homes and businesses
Concrete driveway building
If your driveway has cracked, sunk or holds puddles, we dig out to firm ground and pack the base first, so the new slab has a solid bed.
Concrete patio construction
A back patio usually sits right against the house, so we set the slope to carry rain away from your foundation before any concrete goes in.
Stamped concrete services
Stamped concrete gives a patio or walk the look of stone or brick in one pour, and we press the pattern while the surface is still workable.
Concrete sidewalk building
A front walk that's heaved into trip edges gets torn out, rebuilt on a packed base and given a broom finish, a light brushed texture for grip.
Garage floor concrete
A cracked or flaking garage floor gets replaced with a new slab and control joints, shallow cut grooves that give cracks a straight place to form.
Decorative concrete
Colored, stained or exposed-stone finishes suit an entry, a patio border or a walk where plain gray would look out of place beside the house.
Concrete retaining walls
Where a yard slopes down toward the driveway or the house, a poured retaining wall holds the soil back and gives you a level spot to use.
Concrete floor installation
Barns, workshops and basements get a level floor over a packed base, with rebar, steel bars that hold the slab together, where the load needs it.
Concrete pool decks
A pool deck needs a textured top that stays grippy when it's wet and a slope that sends splash water away from the pool and the house.
Concrete steps construction
Front and back steps that have cracked or pulled away from the house get rebuilt with even risers, so every step is the same height underfoot.
Slab foundation building
For a garage, an addition or a bigger shed, we pour the slab foundation and build it to whatever the town asks for on the permit.
Foundation installation
Builders and homeowners adding on call us for poured foundations, where the layout, the dig and the forms get planned well before the truck shows up.
Concrete parking lot building
Small businesses here use us for parking areas poured thick enough for steady traffic and sloped so rain drains off instead of pooling by the door.
Concrete footings
Decks, porches and sheds sit on footings, and we dig and pour them to the depth the town calls for, so they rest below the frozen ground.
Foundation raising
When a slab or foundation has settled out of level, we look at what's underneath first, because lifting it without fixing the cause only buys time.
Concrete cutting
We saw-cut clean openings, trenches and edges in existing concrete, whether it's for a drain line, a new doorway or pulling out a damaged section.
Get a free on-site concrete estimate in Londonderry
Send the form and we'll reply within one business day to set a time. I come out myself, look at the spot and leave you a free estimate on site, with no pressure to book.
(603) 377-5028- Based in
- Merrimack, NH 03054
- Hours
- Mon–Fri: 8 AM–10 PM, Sat–Sun: 7 AM–9 PM
What we deal with on concrete jobs in Londonderry
Whether your concrete job needs a permit is the town's call. The Town of Londonderry's building and zoning office decides what a driveway, slab, footing or foundation needs, and we'll help you find out and get the paperwork moving, then build to what they ask. Building permits there go in by mail or in person, not through the town's online portal, so we start early, because the schedule usually hangs on that paperwork and on a good day for the pour. If you'd rather ask the town yourself, its main number is (603) 432-1100. Price moves mostly with the size of the slab, how much has to be dug out and the finish you pick, and I'll put your own figure in front of you at the estimate. We're licensed and insured, and our work is backed by our satisfaction guarantee.
Getting a concrete truck to your driveway is part of the plan too. Pennichuck Water is putting in a new water main on Old Nashua Road through the 2026 construction season, so if your house is off that road we check the route before we book a pour, because a truck stuck in traffic is a load that's already starting to set. I've run this business out of Merrimack since 2013, and we do the same work next door in Derry and across the cities around it, so these roads are familiar ground for our crew.
Why Londonderry slabs crack, sink and hold water
On a lot of houses here the driveway runs down to an attached garage, so rain ends up at the garage door, sits on the slab and soaks into the ground underneath until the edge drops. Before we form anything, we check where water runs on your lot and set the slope so it heads away from the house and the garage, because a slab that falls toward the house just brings the problem back.
Many of the old slabs we tear out sat on raked dirt with no packed base, and they settled right along with it. If your budget's tight, I'd rather you pick a plain broom finish than cut the base, because the base is hidden on day one and decides how the slab holds up for years.
How a concrete job runs when you call us in Londonderry
Here's how a job goes from your first call to the day you can use the slab again, and who you'll see at each step.
Call or send the form
Tell us where the house is and what you want poured or fixed, and we'll set a time for me to come out. You don't need drawings or measurements.
I look at the spot
I come out myself, walk the spot with you, ask how you'll use it and check where the water goes, so it helps if you're home. I leave the estimate with you on site, so you know the cost before anything is booked.
We prep the ground
Once you say go, we get any permit paperwork moving with the town, then dig out to firm ground and pack the base. The town sets the pace on the paperwork, and we don't rush the base to make up time.
We pour and finish
I'm on site with our crew for the pour and the finish, and we cut the control joints on time. Before we leave, I tell you when you can walk and drive on it and what to watch for.
Questions about concrete work in Londonderry
Do I need a permit for a concrete driveway or patio in Londonderry, NH?
Ask the town before you assume either way, because its list of residential building permits names additions, decks, porches, garages, barns and carports, not driveways or patios by name. If the concrete is part of building one of those, like a new garage or porch, that project falls under a building permit. We'll help you find out and get the paperwork moving.
Does a shed slab or shed footings need a permit in Londonderry?
Sheds under 200 square feet don't need a permit in Londonderry, and bigger ones do. At 200 square feet or more, the town also wants the footings set down to a frost depth of 48 inches, and every shed, whatever its size, has to meet the town's setback rules. We dig and pour shed footings to that depth so they sit below the frozen ground.
How much does a building permit cost in Londonderry?
The town charges a $25 application fee with each building permit you submit. That's the fee to apply, so ask the town whether anything else applies to your project, and we can help you sort out what to file.
How much does a new concrete driveway cost in Londonderry?
I can't give you an honest number until I've seen the spot, because the biggest parts of the price only show up on site. Tearing out the old slab, how much soft fill has to come out, the base, the thickness, any rebar, how close the truck can get and the finish you choose all move it. I'll come out and leave your figure with you before I go.
How long does a new concrete driveway need to cure before I can drive on it?
You'll be walking on it well before you can park on it, because curing is the stretch after the pour when the concrete keeps gaining strength, and a car asks a lot more of it than your feet do. The wait shifts with the weather and the slab, so I'll give you the days for walking and for driving before we leave.
What causes a concrete driveway to crack or sink?
Most cracking and sinking starts under the slab, with a base that was raked level instead of dug out and packed, so the concrete settles with the dirt. Water running toward the house or sitting on the slab makes it worse, and so do control joints cut late or skipped. We pack the base, check where water goes and cut the joints on time, so when a crack does come, it lands in a groove.
Merrimack, NH
Tell us about your Londonderry concrete job
If you're planning a garage, porch or bigger shed, calling early gives us time to sort out the town's paperwork before you want the pour.