A new patio is one of those home projects that seems straightforward until you start getting quotes. You have a rough idea of the size. You have seen a material you like. Then the figures come back and they are either much higher than expected, wildly different from each other, or both.
The confusion is almost always about what is and is not in the price. Two quotes for the same garden can look very different on paper while covering very different scopes of work. Understanding what a new patio actually costs means understanding every layer of the job, starting with the ground beneath the slabs.
This guide breaks it down clearly, from the ground up.
Ground preparation: the part you never see
The surface of a patio is what everyone photographs and talks about. The ground beneath it is what determines whether that surface is still looking good in ten years or lifting and cracking after two winters.
Excavation depth depends on the ground, intended loads, drainage and paving system. Moisture and frost can affect some soils, so the contractor should assess the site rather than specify a deeper base solely because the soil is clay.
The sub-base supports the paving and must be specified and compacted for the chosen system. Type 1 aggregate is common in conventional construction; permeable systems need a suitable open-graded build-up. A stable base and a planned route for water both matter.
The spoil from excavation needs to go somewhere. Skip hire and soil disposal are costs that some contractors include in their quote and others leave out. Always ask.
Access: a hidden cost that catches people out
How easy it is to get materials and equipment into your garden has a direct effect on how long the job takes and therefore what it costs.
A back garden that can be accessed via a wide side gate, or where the patio is adjacent to the house and materials can be brought through, is straightforward. A garden that requires carrying every slab through the house, down a narrow passage, or over an existing lawn costs more in labour time. Thirty slabs carried 40 metres take significantly longer to handle than thirty slabs carried five metres.
Machinery access matters too. A mechanical digger makes excavation faster and more precise than hand digging, but getting one into a confined space is not always possible. If the excavation has to be done by hand because of access, that adds time and therefore cost.
Access constraints also increase the risk of damage to existing features. Paths, turf, and paving near the route to the work area can all suffer during a project. A contractor who prices access properly will have thought about how to manage this. One who has not will leave you managing the consequences.
Materials: what the price tiers actually mean
Concrete, natural stone and porcelain each offer a range of prices and specifications. Compare the complete installed cost rather than treating them as fixed price tiers.
Concrete flags are available at different prices and performance grades. Price alone does not establish frost resistance. Check the manufacturer’s suitability for outdoor use, declared performance and installation requirements.
Natural sandstone covers a wide range. Indian sandstone is the most widely available and spans from budget calibrated flags to premium riven-finish slabs with more character and variation. Limestone is available in honed and tumbled finishes, each with different maintenance requirements. British stone, such as York stone, suits traditional properties well and sits at the higher end of the natural stone category.
Porcelain’s installed cost depends on the product, cutting and laying requirements, and can overlap with natural stone. Outdoor porcelain usually has low water absorption, but correct installation still matters. Follow the manufacturer’s system; many products use a full mortar bed with a bonding primer. Check joint widths, slip performance and cleaning guidance rather than assuming porcelain cannot become slippery or develop surface growth.
The material cost is only part of the installed cost. Each tier has different installation requirements beneath it, and the bedding and sub-base costs do not disappear because you chose a cheaper slab.
Drainage: what happens to the water
A patio that does not drain correctly is a problem in multiple directions. Water sitting on the surface is slippery and unpleasant. Water sitting beneath the surface, trapped with nowhere to go, causes the frost damage and settlement that shortens the life of the whole installation.
Drainage starts with the falls, the gentle slopes built into the surface so water runs off predictably rather than pooling. Falls are established at the sub-base stage, carried through to the surface. A contractor who sets falls at the bedding level but not at the sub-base level is solving the visible problem while leaving the invisible one untouched.
For most domestic patios, the surface falls to an area of permeable ground, a lawn, a border, or a gravel margin, and that is sufficient. Where the garden is heavily paved, where there is a significant volume of water to manage, or where the ground is particularly impermeable, a drainage channel or soakaway may be needed. This is typically priced separately from the patio itself because it is separate work.
Planning permission and Building Regulations are separate. In England, front-garden hard surfacing over five square metres generally needs planning permission if it is impermeable and does not direct water to a permeable area within the property. This is not a blanket Building Regulations rule for every patio. Check the rules for your location and project, including any restrictions on permitted development.
What the quote should include
A complete, comparable quote for a new patio should itemise the following: excavation to the required depth, sub-base material and compaction, bedding layer appropriate to the chosen material, slab supply and laying, cutting and waste, jointing with the specified compound, and disposal of all arisings. Edge details and any drainage channel or soakaway should be priced as separate line items if they are in scope.
Compare each quote against the same scope. A lower figure that excludes excavation waste, sub-base or drainage is not directly comparable with a price that includes them. Ask the contractor to confirm exclusions and how any unexpected groundwork will be charged.
Design complexity adds cost in predictable ways. A rectangular, single-level patio on flat ground is the most straightforward job a patio contractor does. Curves, circular features, multiple levels, and integrated steps all require more setting out, more cutting, more material waste, and more time. Each adds to the final figure, and each is worth understanding before you commit to a design.
Maintenance: the cost after the cost
Maintenance is rarely discussed in the excitement of planning a new patio, but it is part of the true cost calculation.
Natural stone may need cleaning and joint maintenance, especially in damp or shaded positions. Sealing is product-dependent, and aggressive pressure washing can damage some surfaces or joints. Follow the supplier’s maintenance guidance.
Porcelain can be relatively easy to clean, but it still needs routine care. Leaves, dirt, algae and damaged joints can affect any paved area. Follow the manufacturer’s instructions for cleaning products and any sealing treatment.
For concrete too, check the declared specification and maintenance requirements. It is not accurate to assume that every inexpensive flag will fail within a few winters.
Thinking about maintenance cost over ten or fifteen years rather than just the installation day shifts the calculation on material choice. The cheapest option to install is not always the cheapest option to own.
Getting to a realistic figure
The most reliable way to budget for a patio is to start with your true scope, the size, the material you want, the ground conditions, and any design complexity, and get quotes based on that complete brief rather than an approximation.
A site visit from an experienced contractor is worth arranging early in the process, before you are attached to a specific material or design, because ground conditions and access can shape what is practical as much as budget does. A good contractor will tell you what they find under your garden and what it means for the project, and that information is genuinely useful before any money changes hands.
The Royal Horticultural Society publishes guidance on patio planning, drainage, and material selection that is a useful reference alongside contractor conversations.
The gap between the patio you want and the patio you can afford narrows considerably once you understand what every part of the budget is actually covering.
Photo by Joaquin Carfagna: https://www.pexels.com/photo/a-table-and-chairs-17756350/
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