A patio is a paved outdoor area next to the house or in the garden, laid in porcelain, natural stone or concrete slabs on a compacted sub-base and mortar bed, with falls that direct rainwater away from the house.
Every house in Carshalton is a little different, so we never price a new patio from a brochure. We look at the structure, access and existing finishes first, then put in writing a fixed figure for the scope we settle on. As a rough steer, homeowners in London should budget £3,200–£7,200 including VAT, with work typically taking 3–7 days on site.
- Guide price
- £3,200–£7,200 inc VAT
- Time on site
- 3–7 days on site
- Postcodes
- SM1, SM2, SM3, SM4 and SM5
- Planning rules
- England
- Local area
- Greater London
- Survey
- Free, with a written quote
What should you budget for a new patio in Carshalton?
What should you budget for a new patio in Carshalton? Use the figures below as a starting point. Prices in London sit about 30% above the national guide, so the range here is £3,200–£7,200 including VAT. Your fixed price comes in writing once we've surveyed the property, at no charge.
| Type of job | What it usually involves | Guide in Carshalton |
|---|---|---|
| Small patio or path | Around 10m² of concrete slabs or a garden path. | £1,300–£3,200 |
| Typical 20m² patio | Sandstone or porcelain on a full sub-base with jointing and edging. | £3,200–£7,200 |
| Large or multi-level patio | Bigger areas, steps, retaining walls or premium stone. | £7,200–£15,500 |
Expect these to shape the final quote:
- Patio area and the amount of excavation
- Slab material, size and laying pattern
- Drainage needed to keep water away from the house
- Access for materials and removing spoil
Scope of the work
- Survey of levels, damp-proof course, drainage and access
- Excavation and removal of turf, soil or old paving
- Compacted MOT Type 1 sub-base
- Slabs laid on a full mortar bed with falls away from the house
- Primer on porcelain slabs for a strong bond
- Edging and neat cuts around drains and walls
What are homes like around Carshalton?
London's housing is dominated by Victorian and Edwardian terraces, often in yellow London stock brick, with Georgian terraces in central districts and mansion blocks across many inner areas. Outer boroughs have large belts of interwar semis, and there are extensive post-war council estates. Many houses have been split into flats, and conservation areas are widespread.
London Clay shrinks and swells with the seasons, and street trees close to houses can contribute to movement, which affects foundation design.
These patterns matter for a new patio: older walls, roofs and floors in Carshalton can need different materials or extra preparation compared with newer homes.
Permissions for a new patio in Carshalton
England, Wales, Scotland and Northern Ireland each handle planning a little differently. Carshalton comes under England, covered below, and we raise any questions with the council before your quote is finalised.
A ground-level patio in a back garden does not usually need planning permission in England. Raised decks or platforms more than 30 cm high do.
Building Regulations do not normally apply to patios, but levels must stay below the damp-proof course and drain away from the house.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
The four stages
We look at the job
We arrange a free site survey on a date convenient to you. We measure up, look at the existing structure and access, and discuss your plans for a new patio so the price reflects your home.
Your fixed price
We put everything into a written, fixed-price quote: the specification, what's excluded, staged payments and the expected time on site. Take whatever time you need to decide; there's no pressure to commit.
Plan and prepare
Before anyone starts, we confirm the programme in writing, check whether consents are required and arrange deliveries. If a skip or scaffolding on the road needs a permit, we apply for it.
On site to finish
On site, the agreed plan is followed and any change is put in writing first. At completion we do a final clean, go through the snagging list with you and leave you with the relevant documents.
Working with SK Home Improvements
Patios and paving in Carshalton: questions
How much will a new patio cost in Carshalton?
As a guide, expect to pay £3,200–£7,200 including VAT for a new patio in Carshalton. That range is adjusted for London, which runs about 30% above the national guide. Where your project lands depends on size, materials, access and the condition of what is already there. We confirm a fixed price in writing after a free survey of your home.
Do you cover Wallington, Sutton and Mitcham?
Yes. As well as Carshalton, we cover Wallington, Sutton and Mitcham and the rest of London. Our coverage is UK-wide, so the process is the same wherever you are: a free site survey, a quote in writing that fixes the price for the agreed scope, and one point of contact while the work is planned and carried out.
How much does a new patio cost?
A typical 20m² patio in sandstone or porcelain costs £3,200–£7,200, including excavation, sub-base, laying and jointing. As a guide, allow roughly £100–£220 per square metre plus fixed costs for set-up and waste. Concrete slabs cost less, while slate, granite and large-format porcelain cost more. Steps, walls and drainage add to the total. We confirm a fixed price after the survey.
Does a patio need planning permission?
Most patios do not need planning permission, but it depends on the size, height and location, your home's position, whether it is listed or in a conservation area, and which UK nation you are in. Raised patios or decking more than a small height above the ground may need permission because of overlooking. We check the position for your garden before quoting.
What should I do before the work starts?
Before work starts, clear garden furniture, pots and ornaments from the area and agree where materials will be delivered and stored. We need a route for wheelbarrows and, on larger jobs, a small digger, so let us know about side gates, narrow passages or access through the house. Tell us about any known drains, cables or pipes in the area.
Also covering areas around Carshalton
Coverage for Carshalton spans SM1, SM2, SM3 and SM4. Close by, Wallington, Sutton and Mitcham are covered too, and the rest of our UK-wide area follows the same survey-then-quote process from start to finish.