Hardscaping · Service

Patio installation, starting with the part you never see

Two patios quoted at very different prices are usually not the same product. The difference is under the surface. We match you with vetted local hardscape pros and tell you what to specify before you compare a single number.

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In short

What is patio installation?

Patio installation is an excavation job with a decorative finish on top. A crew strips the topsoil, shapes the subgrade to a slope that carries water away from your house, builds and compacts a base of crushed aggregate, then sets the surface — pavers, poured concrete or natural stone — on top of it. The surface is what you choose; the base and the slope are what decide whether the patio is still flat in ten years.

Triggers

Signs you need patio installation

You have a back door that opens onto grass, mud or a patch of dead lawn, and nobody uses the yard because there is nowhere to put a chair
The existing slab is cracked, tilted or sinking, and levelling it repeatedly has stopped working
Water sits against the house after rain, or the existing paving slopes back toward the foundation
You are adding an outdoor kitchen, fire feature or hot tub and need a stable, level, load-rated surface underneath it before anything else happens
The grill, the table and the chairs all live on a lawn that never recovers
You are landscaping the whole yard and want the hard surfaces set before the planting, irrigation and lighting go in — because doing it the other way round means digging them up

Seeing something not on this list? Browse hardscaping problems by symptom →

The job

How patio installation actually works

Siting, slope and the house connection

Before anything is priced, the patio needs a location and a fall. Paved surfaces shed water rather than absorb it, so the design has to decide where that water goes — away from the foundation, and not onto a neighbour. Door thresholds, existing grade and any basement or crawl space below all constrain the finished height.

Watch for: A patio designed flat, or sloped toward the house because that is the easier grade to hit. This is the single most expensive mistake on the list, because the damage lands in your foundation rather than your patio.
Utility locates and what is under the dig

A patio excavation is deep enough to find things. Public utility locating has to happen before a shovel goes in, and it does not cover private lines — irrigation, low-voltage lighting, a gas run to a grill, a septic field, the line to a detached garage.

Watch for: A crew that arrives with a mini-excavator and no locate tickets. Also ask specifically who is responsible for private lines, because the free public locate service will not mark them and the contract usually excludes them.
Permits, setbacks and impervious surface limits

Rules for patios are genuinely local. Many jurisdictions treat an at-grade patio differently from a raised one, and separately cap how much of a lot can be covered in impervious surface. HOAs frequently regulate material and colour on top of that.

Watch for: Being told "you never need a permit for a patio". Sometimes true, often not, and it varies by municipality and by how close you are to a property line, a septic field or a wetland buffer. Get the answer from the building department, in writing, before the deposit.
Excavation and subgrade preparation

Topsoil and any organic material comes out entirely — it compresses and rots, and anything built on it settles. The exposed subgrade is then shaped to mirror the finished slope and compacted before a single stone of base goes down.

Watch for: Excavation that stops at the depth needed for the pavers plus an inch or two. Soft or wet subgrade being covered rather than dealt with is the other one — if the ground pumps under the plate compactor, that is a problem to solve, not to bury.
Base construction, in compacted lifts

Crushed aggregate is placed and compacted in shallow layers rather than dumped in one go, because a compactor only densifies a limited thickness at a time. Depth depends on the soil, the climate and whether anything will drive on it — a patio spec is not a driveway spec.

Watch for: One deep dump of stone and a single pass with a plate compactor. Ask how many lifts and what depth each one is. If the answer is vague, the base is the line item being cut, and you will not be able to see it once the surface is on.
Edge restraint

Any unit paving — pavers, cut stone, brick — needs a restrained perimeter. Without one, the outer courses migrate outward under foot traffic and freeze cycles, joints open, and the field of paving slowly loses its interlock from the edges inward.

Watch for: Edging spiked into loose fill rather than into compacted base that has been extended past the paving line. The restraint is only as good as what it is pinned into.
Setting the surface and finishing the joints

The setting layer is screeded, the surface is laid to the pattern and cut in at the edges, and the joints are filled and locked. Poured concrete substitutes forming, reinforcement, the pour itself and control joints for this stage.

Watch for: Cuts made dry with no dust control, and a finished level that leaves door thresholds or a lawn edge sitting proud. Ask to see the transition detail at the house before it is built.
Grading back, cleanup and handover

Spoil from the excavation is a real volume and has to go somewhere. Surrounding grade is restored so it drains away from the new hard edge, and the crew should walk you through joint sand, sealing, and what settlement in the first season is normal.

Watch for: Spoil "spread on site" without agreement — it usually ends up as a berm that redirects water somewhere you did not want it. Get removal or placement written into the scope.

Money

What does patio installation cost?

Patio pricing is driven by square footage, material, how much excavation and spoil removal the site needs, access for machinery, and whether the grade has to be rebuilt. Base depth is a real cost line, not padding — a cheap quote is often a shallow base. Compare specifications, not just totals.

See the full patio installation cost guide — by material, size and region →

Hardscaping planning tools and calculators → Size the footprint and rough out material quantities before you take quotes.

Straight answer

When patio installation is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The yard has a drainage problem you have not solved. A patio is an impervious surface. Putting one over ground that already holds water concentrates the runoff rather than fixing it, and you will be lifting the patio to deal with it later. Sort the grading and the drainage first, then pave.
You want it installed on frozen or saturated ground to hit a date. You cannot compact a base properly in either condition. A crew willing to build in those conditions is telling you what their standards are.
Your budget only covers the surface you want if the base is cut. A smaller patio built correctly beats a larger one that heaves. Reduce the footprint or change material — never the base.
You are about to do work that will bring machinery across it. An addition, a pool, a foundation repair, a septic replacement, a large tree removal. Finished paving is not a haul route, and repairing tracked-over paving costs more than sequencing the work properly.
Access is so tight that everything must be barrowed by hand and you were expecting machine pricing. A gate too narrow for a mini-excavator can move a project into a different cost bracket entirely. Worth knowing before you fall in love with a design.
You are selling within a year and treating it as a return on investment. A patio genuinely improves how a house shows, but the spend and the resale bump are not the same number, and a rushed build shows in the photographs.

Your options

Types of patio installation

Compare patio materials

Concrete pavers, natural stone, brick, poured and stamped concrete, gravel and decomposed granite — each on its own terms, including how each one fails.

Head-to-head decisions

Pavers versus poured concrete, stamped concrete versus pavers, natural stone versus manufactured pavers — resolved side by side rather than restated here.

Paver patio installation

The interlocking-paver build in detail: setting bed, joint sand, edge restraint and why individual units can be lifted and reset.

Natural stone patio

Flagstone and bluestone, dry-laid or mortar-set, and the thickness and jointing decisions that come with irregular stone.

Layout and circulation

Where the patio sits relative to the kitchen door, the grill, the sun and the route through the yard.

Permeable paving

Some municipalities credit permeable surfaces against impervious-coverage limits or stormwater fees. The rules are local — check yours before assuming either way.

Compare hardscaping options side by side →

Straight answer

Can I do this myself?

The two failure modes worth taking seriously on a DIY patio are not injury risk — they are grading water toward your own foundation, and cutting into a buried service. Call for utility locates before you dig, every time, even for a small patio.

Reasonable to DIY

Laying out the footprint with stakes and string and living with it for a week before committing
Demolition and removal of an existing small slab or path, if you have a way to dispose of the rubble
Hand-excavating a small, flat, ground-level patio well away from the house
Filling and sweeping joints, and topping up joint sand a season later
Sealing, where the material actually calls for it — plenty do not
Restoring the surrounding grade and turf after the crew has gone

Call a licensed pro

Establishing the slope and the finished height where the patio meets the house — this is the decision with foundation consequences
Anything over soft, wet, clay or filled ground, where the base has to be engineered rather than guessed
Base compaction on a patio of any real size — hiring a plate compactor is easy, knowing whether the base is actually dense is not
Cold-climate builds where frost heave governs, and the drainage of the base itself matters as much as its depth
Anything raised more than a step above grade, which usually pulls in retaining, guards and a permit
Cutting stone or pavers in volume, where silica dust control is a real health requirement rather than a nicety

Before you sign

What to check when hiring for patio installation

What is the base specification for my soil, and how many compacted lifts?

The one question that separates quotes. Ask for depth and lift count in writing. A contractor who builds proper bases will answer immediately and will be glad you asked.
Which way does the patio slope, and where does the water end up?

You want a specific answer naming a direction and a destination. "It will drain fine" is not an answer.
Who pulls the permit, and have you confirmed the impervious-coverage rules for this lot?

Coverage limits catch people out far more often than the permit itself, especially on smaller suburban lots that already have a driveway and a garage.
What edge restraint are you using, and what is it pinned into?

Edges are where unit paving starts to fail. The restraint needs compacted base under it, extended beyond the paving line.
What happens to the spoil, and is removal in this price?

A patio excavation produces a lot of soil. Discovering it is excluded, on the day, is a bad conversation.
How will you get machinery in, and what will be damaged getting it there?

Lawn, irrigation heads, a fence panel, a gate post. Agree the route and the make-good before the machine arrives.
What do you warrant, and does it cover settlement?

Settlement is the failure homeowners actually experience. A workmanship warranty that excludes it is not covering the risk you are worried about.

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Local pros

Patio Installation near you

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Related work

Often done at the same time

Paver Patio Installation

The interlocking-paver build

Natural Stone Patio

Flagstone and bluestone

Retaining Wall Installation

When the patio needs a level terrace first

Outdoor Living Design Build

The whole backyard as one project

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FAQ

Patio Installation — questions people ask

Still have a question? Talk to our team →

How deep does the base under a patio need to be?

There is no single number, and be suspicious of anyone who gives you one over the phone. It depends on your soil — free-draining sand behaves nothing like clay — on whether you are in a freeze-thaw climate, and on what the surface will carry. A patio that only holds furniture and people needs less than a surface a car will drive on. What you should insist on is that the contractor states the depth for your site, in writing, along with how many compacted layers it will be built in.

Do I need a permit to install a patio?

It varies by municipality and there is no safe national answer. Many places treat an at-grade patio more leniently than a raised one, but separately enforce limits on how much of a lot can be covered by impervious surface — and a patio counts. Proximity to a property line, a septic system, a wetland or a floodplain can change the answer entirely. Ask your building department directly, and check your HOA covenants separately, because those often restrict material and colour even where the town does not.

What is frost heave, and does it affect patios?

In climates that freeze, water held in the ground expands as it turns to ice and lifts whatever is above it — then drops it again when it thaws. Repeated over seasons, that is what tilts slabs and pushes paving out of level. The defence is a base that drains rather than holds water, adequate depth for the local frost conditions, and keeping water away from under the paving in the first place. It is the main reason a cold-climate patio spec is not the same as a warm-climate one.

How long does patio installation take?

The paving itself is usually the shortest part. Expect the calendar to be dominated by permit review if one is needed, HOA approval, utility locates, material lead times on anything not held locally, and weather — you cannot compact a base in saturated ground or place concrete in the wrong conditions. Ask for a schedule that shows those gaps rather than only the days the crew is on site.

Can a patio be built over an existing concrete slab?

Sometimes, and it is worth asking about, because it can avoid a full demolition. It depends entirely on the condition of the slab — whether it is sound, whether it is level, whether it drains the right way, and how much extra height the new surface adds relative to your door thresholds. A slab that is cracked because the ground under it moved will keep moving, and overlaying it just hides that for a while. Have someone look at it rather than assume either way.

Which patio material lasts longest?

Durability is decided more by the base than by the surface, which is why this question rarely has the answer people expect. Any of the common materials will outlast a bad base. Where materials genuinely differ is in how they fail and how they are repaired: individual pavers and stones can be lifted and reset, a poured slab cracks as a unit. Our materials guides cover each on its own terms rather than declaring a winner.