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.
We arrange a new patio for homeowners in Welwyn Garden City and the wider Hertfordshire. The job is planned, priced and managed by us and carried out by tradespeople engaged under our contract, so there is one agreement and one contact. On a typical home the work takes 3–7 days on site, and guide pricing in the East of England is £2,600–£5,800, VAT included.
- Guide price
- £2,600–£5,800 inc VAT
- Time on site
- 3–7 days on site
- Postcodes
- AL7 and AL8
- Planning rules
- England
- Local area
- Hertfordshire
- Survey
- Free, with a written quote
How much does a new patio cost in Welwyn Garden City?
Budgeting for a new patio in Welwyn Garden City? The numbers below include VAT and are adjusted for the East of England, where costs are about 5% above the national guide. The headline range is £2,600–£5,800. Nothing is final until we have measured up at a free survey and agreed the specification with you.
| Type of job | What it usually involves | Guide in Welwyn Garden City |
|---|---|---|
| Small patio or path | Around 10m² of concrete slabs or a garden path. | £1,050–£2,600 |
| Typical 20m² patio | Sandstone or porcelain on a full sub-base with jointing and edging. | £2,600–£5,800 |
| Large or multi-level patio | Bigger areas, steps, retaining walls or premium stone. | £5,800–£12,500 |
The main things that change the figure:
- Patio area and the amount of excavation
- Ground levels, slopes, steps and retaining walls
- 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
- Primer on porcelain slabs for a strong bond
- Edging and neat cuts around drains and walls
- Site cleared, waste removed and paving cleaned
Local housing and a new patio
Hertfordshire is home to the first garden cities, Letchworth and Welwyn Garden City, and the post-war new towns of Stevenage, Hatfield and Hemel Hempstead. Watford and St Albans have Victorian terraces and Georgian streets, interwar semis line the commuter suburbs, and brick-and-flint cottages appear in Chiltern villages to the west.
Generally dry with chalk and clay soils; clay areas can move in long dry spells, and mature trees near houses need considering for foundations.
For a new patio in Welwyn Garden City, this means checking things like wall construction, roof structure and existing services before we put a figure on paper.
Planning and building rules in Welwyn Garden City
For anyone in Welwyn Garden City, the relevant framework is England's. The summary below is general, so we always contact the council about your address before putting a price in writing.
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.
What happens after you get in touch?
A visit to your home
Book a visit and we'll come to you. The survey covers measurements, the state of what's there now and any obvious constraints, so the price that follows is based on your actual home, not an average.
Your fixed price
We turn the survey notes into a written quote. The price is fixed for the specification we agree, and the document sets out materials, scope and payment stages in plain language.
Booking the work
We handle the paperwork side: checking whether planning permission or building control approval is needed, submitting applications where they are, and scheduling the trades and materials around your dates.
Finish and handover
During the work we protect the areas around it and tidy up at the end of each day. Once complete, we check the finish, remove our materials and hand over paperwork such as building control sign-off where it applies.
Why homeowners choose us
Frequently asked questions
Is the price fixed?
Yes, for the specification we agree. Your written quote sets out exactly what is included at a fixed price. It only changes if you ask for something different, or if a problem the survey could not reasonably reveal later needs extra work. In either case we explain the change and confirm it in writing before going ahead.
What happens if my garden slopes?
A sloping garden can still have a level patio by cutting into the slope, building up with retaining walls, or creating terraces with steps between them. Retaining walls must be built to hold back the soil and allow drainage behind them. This adds cost but creates usable, level space. We look at the slope during the survey and suggest the most practical design.
Can you combine a new patio with other work?
Yes. Because we manage several trades under one contract, we can plan a new patio alongside other work on your Welwyn Garden City home, such as new windows with rendering, or a kitchen refit with an extension. Combining jobs can reduce repeat set-up such as scaffolding, skips and access, and every element is listed and priced in the same written quote.
How do you make sure water drains away from the house?
A patio needs a gentle fall, usually a little over 1 in 80, so rainwater runs away from the house towards the garden, a drain or a soakaway. The surface should also sit well below the damp-proof course. If the patio meets a door threshold, a channel drain may be needed. We set levels with string lines and check falls as we lay each section.
Is porcelain or sandstone better for a patio?
Porcelain is dense, stain-resistant and stays looking clean with little care, making it a good choice if you want a modern, low-maintenance patio. Indian sandstone has natural colour variation and a softer, traditional look, and costs a little less, but it can stain and weather over time and benefits from sealing. Both make durable patios when properly laid. We bring samples to the survey.
Also covering areas around Welwyn Garden City
Addresses in AL7 and AL8 are all covered for Welwyn Garden City, along with Hatfield, Hertford and St Albans close by. Give us your postcode when you get in touch and we will confirm the details.