Lay a Patio: Trade vs DIY
Laying a patio is DIY-able for most homeowners with basic groundwork skills. A standard 20–30 m² patio costs £400–£900 in materials if you do it yourself, versus £1,500–£4,000+ for a professional. No building regulations apply for most domestic patios.
The DIY Option
Laying a patio is one of the more achievable DIY projects for a motivated homeowner, but it demands physical effort, patience, and a willingness to get the groundwork right. Skill level is intermediate — you need to understand sub-base preparation, correct mortar mix ratios, and how to establish a consistent fall (typically 1:60 away from the house) to prevent waterlogging. Expect to spend two to three full weekends on a 20–30 m² area, including excavation, compacting the sub-base, bedding slabs, and pointing. Essential tools include a spade, plate compactor (hire for around £60–£80 per day), rubber mallet, long spirit level, string lines, angle grinder with a diamond blade, and a pointing trowel. Material costs vary significantly by slab type: budget concrete slabs can be sourced for £15–£30 per m², while natural stone or porcelain tiles run £40–£100+ per m². Factor in MOT Type 1 sub-base, sharp sand, and cement on top. Total DIY spend for a 25 m² patio typically falls between £400 and £900 depending on materials chosen. The main risks are poor drainage (slabs sinking or water pooling near the house), uneven levels causing trip hazards, and inadequate sub-base depth leading to movement and cracking. Our step-by-step how to lay a patio guide walks you through every stage in detail.
The Trade Option
A professional landscaper or paving contractor will survey the site, calculate the correct falls, excavate to the appropriate depth (typically 150–200 mm for a full sub-base), compact with a mechanical plate compactor, bed slabs on a full mortar bed or appropriate adhesive, and point all joints to a finish. They bring experience handling difficult materials such as large-format porcelain slabs, which can crack if bedded incorrectly. For a standard 20–30 m² patio using mid-range slabs, expect to pay £1,500–£4,000 including materials and labour; high-end natural stone or complex patterns will push costs higher. For labour only, professional day rates typically run £200–£350 per person. To find a reputable contractor, use a vetted trades directory or ask neighbours for recommendations — Checkatrade and similar platforms publish verified reviews. Always obtain at least three written quotes and confirm the contractor carries public liability insurance. If your project involves retaining walls or significant groundwork near the house foundations, ensure the contractor has relevant structural experience. You may also wish to look at our guide to building a garden wall if a raised surround is part of your design.
Side-by-Side Comparison
| Factor | DIY | Trade |
|---|---|---|
| Cost | £400–£900 (materials + hire) | £1,500–£4,000+ (supply and fit) |
| Time | 2–3 full weekends | 2–4 days (professional crew) |
| Skill Required | Intermediate | Trade level |
| Risk Level | Medium — drainage and level errors common | Low — experienced contractor manages drainage and falls |
| End Quality | Good with care; depends heavily on sub-base preparation | High — professional finish and consistent jointing |
| Legal Requirements | No building regs for most domestic patios; permitted development applies | Same — no special certification required for paving |
When DIY Makes Sense
- You are laying a straightforward rectangular or simple-shaped patio on relatively flat, stable ground with no significant slopes or drainage complications.
- You are using standard concrete or natural stone slabs rather than large-format (600 mm+) porcelain tiles, which require specialist adhesive bedding and are prone to cracking if mishandled.
- You have the time, physical fitness, and access to tool hire for the plate compactor and angle grinder — this is not a project to attempt with hand tools alone.
- Your budget is tight and you are happy to invest time in exchange for saving £1,000–£3,000+ compared to a professional quote — particularly useful if you are also planning companion projects such as a budget patio layout or adding gravel borders.
When You Must Use a Tradesman
- The patio runs alongside or over an inspection chamber, drainage run, or soakaway — disturbing these without proper knowledge can cause costly drainage failures and may require sign-off from your local authority.
- You are laying a patio immediately adjacent to your house foundations or within 3 m of an open drain connected to the public sewer; in these cases surface water drainage must comply with the requirements of the Building Regulations Approved Document H and a building control application may be required.
- The area exceeds 5 m² and will be covered with a non-permeable surface — under permitted development rules and the Water Industry Act, you may need to use permeable paving or direct run-off to a lawn or border; a professional will ensure compliance so you avoid enforcement action.
- You need significant ground-level changes, retaining structures, or the patio connects to the public highway — all of which require professional assessment and potentially local authority consent.
If You DIY — Where to Start
Begin with our full step-by-step how to lay a patio guide, which covers marking out, excavation depths, sub-base compaction, mortar mixing, slab laying sequence, and pointing. Before you start, review our patio materials guide to choose the right slab type for your budget and use. If you are tackling the surrounding garden at the same time, the Garden Guide links to all related projects including paths, walls, and drainage work.
Frequently Asked Questions
Do I need planning permission to lay a patio in my back garden?
In most cases, no. Laying a patio in a back garden is permitted development for domestic properties in England, provided it does not involve major groundworks affecting foundations or drainage. However, if your property is listed or in a designated area, check with your local planning authority before starting.
How deep should the sub-base be for a patio?
For a standard pedestrian patio, a compacted MOT Type 1 sub-base of 100–150 mm is typically sufficient on stable ground. On clay soils or areas prone to movement, increase this to 150–200 mm to reduce the risk of sinking and frost heave.
Can I lay patio slabs directly on sand without cement?
You can bed slabs on a sharp sand layer for a dry-lay or loose-lay approach, but it is not recommended for a permanent, bonded patio. Sand-only beds are prone to movement, weed ingress through joints, and uneven settlement, particularly in wetter UK climates.
How long should I leave a new patio before walking on it?
Allow mortar bed slabs to cure for at least 24–48 hours before light foot traffic, and a full 7 days before any heavy use or furniture placement. Pointing mortar (particularly sand and cement mixes) should be left 24 hours before getting wet.
What fall (slope) should a patio have for drainage?
The standard recommendation is a fall of 1:60 (roughly 17 mm per metre) away from any building. This is enough to shed rainwater without the surface feeling noticeably sloped underfoot. Always direct the fall towards a lawn, border, or drainage channel rather than towards the house.
Experienced landscapers nearly always use a full mortar bed (five-point bedding is insufficient for most slabs) and butter the back of each slab — this eliminates hollow spots that cause cracking under point loads. If you hear a hollow tap when you tap a newly laid slab, lift and re-bed it before the mortar sets.
Sources
- Which? — Cost of laying a patio — which.co.uk
- Checkatrade — Average cost to lay a patio in the UK — checkatrade.com
- GOV.UK — Permitted development rights for householders: technical guidance — gov.uk
This guide is for general information only. Always work safely and follow manufacturer instructions. DIYnut accepts no liability for injury or damage arising from DIY work.
