How to Price a Porch Build: Labour, Materials and Margin Guide

Quick Answer: UK residential porch builds typically cost £4,500-12,000 for a small enclosed porch (1.5-2.5m² floor) up to £15,000-25,000 for a larger entrance porch with stone or brick to match a period property. Material choice (PVCu vs hardwood vs brick) and roof type (flat, pitched, gabled) drive cost. Porches under 3m² and meeting specific conditions are exempt from Building Regulations and most are PD, but customer expectations around insulation and glazing have risen since Part L tightened — quote realistically for compliance where the customer wants a usable, year-round space.

Summary

A porch is one of the smallest, most-quoted building products in residential trade. Customers want them for kerb appeal, security, insulation against draughts at the front door, and to control mud/dirt entering the house. The product spans from a £2,500 PVCu-and-flat-roof basic enclosure to a £20,000 brick-and-tile architectural piece that matches the original property.

This guide is for the small builder, joiner, or specialist porch installer pricing residential work. It covers the Permitted Development and Building Regulations position (which has a clear "porch exemption" provided you stay within limits), the cost structures by material, and the margin discipline that turns this from a low-margin commodity to a profitable add-on.

For wider extension pricing see flat roof extension pricing guide and single storey extension pricing guide (if available). For oak-frame premium options see oak frame extension pricing guide.

Key Facts

Quick Reference Table

Spending too long on quotes? squote turns a 2-minute voice recording into a professional quote.

Try squote free →
Porch type Size Cost band
PVCu lean-to flat roof 1.5 × 1.5m £3,500-5,500
PVCu lean-to flat roof 2 × 2m £4,500-7,000
PVCu pitched roof 2 × 2m £5,500-8,500
Hardwood frame pitched 2 × 2m £7,500-12,000
Brick + pitched tile roof 2 × 2m £8,000-13,000
Brick + matched tile (period match) 2.5 × 2m £10,000-16,000
Brick + stone detail 3 × 2m £13,000-22,000
Stone + traditional pitched 3 × 2.5m £18,000-30,000
With dwarf wall and side glazing varies Add £1,500-3,500
With underfloor heating varies Add £800-1,800

Pricing assumes typical residential access, no major levels work, customer-supplied finishes if specialised. Pricing excludes VAT. South-East/London +15-25%.

Detailed Guidance

Building Regulations — the exemption

Schedule 2 Class VII of the Building Regulations 2010 lists exempt extensions. Porches qualify if:

Lose any of these and the porch becomes Building Regs-controlled — Full Plans or Building Notice required, Part L thermal performance required, Part F ventilation required.

The temptation: customer wants the porch heated. Heating it directly from the dwelling's heating system breaches the exemption, triggers Part L (insulation requirements significantly higher), and effectively makes the porch a small extension. If they want heating, quote either (a) electric radiator on its own circuit (separate from main heating — exemption preserved), or (b) full small extension (more expensive).

Permitted Development — the planning side

GPDO 2015 Schedule 2 Part 1 Class D permits porches without planning if:

Conservation areas, listed buildings, and Article 4 Directions can revoke PD. Always check with the local authority.

Material choice and cost

PVCu — modular system, factory-glazed panels, assembled on site. £1,500-3,500 for a 2 × 2m unit supplied. Quick install, lower aesthetic, durability 20-30 years. Right for budget jobs and modern properties.

Aluminium — slim profile, contemporary look. £3,000-6,000 for a 2 × 2m unit supplied. Higher aesthetic, longer durability. Right for modernist or commercial-look properties.

Hardwood — bespoke timber frame, glazed in. £4,500-9,000 for a 2 × 2m unit supplied. Premium look, requires maintenance every 5-10 years. Right for character properties.

Brick / blockwork — traditional masonry, glazed openings. £2,500-4,500 for the masonry shell (2 × 2m). Adds bricklayer cost £180-280/day for 2-3 days. Right for matching existing brickwork.

Stone — natural stone or reconstituted stone. £4,000-8,000 for the shell. Premium for conservation work.

Roof options

Flat roof — EPDM or GRP. £40-80/m² of roof area. Lowest aesthetic for a porch (looks like an afterthought) but cheapest and simplest. Right for budget jobs.

Mono-pitched (lean-to) roof — sloping back to the house. Tiled or slated. £80-180/m² of roof area. Most common porch roof.

Gabled / pitched roof — apex over the porch with gable end. Tiled or slated. £100-220/m² of roof area. Premium look, more material, harder install.

Matching the roof to the existing house roof is the customer's expectation. Plain clay tile to match existing plain clay tile is straightforward — supplier should hold the spec. Matching reclaimed slates or unusual tiles can take weeks of sourcing.

Foundations and slab

Porch foundations:

Floor build-up:

For a 2 × 2m porch, foundations and slab total £700-1,200.

Glazing

Sealed double-glazed units (DGUs) standard. Safety glass (toughened) required:

Modern DGU specification: Ug ~1.0-1.2 W/m²K, warm-edge spacer, whole-window U-value 1.3-1.5. Not Part L-compliant for a habitable extension but for a porch exempt from Part L it's fine.

Glazing cost: £180-280/m² supplied for typical glass; £350-500/m² for larger or unusual sizes.

Doors — internal and external

External door: the new front door of the porch. Composite door (modern security, 5-lever lock) £600-1,200 supplied; insulated steel door £450-900; hardwood £900-1,800.

Internal door (porch to house): the existing front door is kept in place to preserve the exemption. Customer often wants to upgrade this — separate scope. Common pattern: existing wooden front door upgraded to composite £600-1,000 supplied + £150-300 fit. This is a separate quote item.

Worked example: 2.5m × 2m brick porch with pitched tile roof, matching existing property

Customer: 1930s semi, plain clay tile main roof, brick boundary walls; wants matching brick porch with pitched roof.

Pre-quote survey + design                                £180
Building Notice application (precautionary)              £300
Skip (4-yard)                                            £280
Foundations
  Excavation 1.5 × 1.5 × 0.6m = 1.35m³           0.5 day £200
  C25 concrete 0.9m³                                    £130
Brickwork (2.5 × 2m porch perimeter, 4 sides minus opening)
  ~3.5 lin m × 2m height = 7m² wall face
  Bricks (450 facing brick to match)                    £270
  Engineering brick DPC course                          £30
  Mortar                                                £80
  Bricklayer 1.5 days × £240                            £360
  Labourer 1.5 days × £160                              £240
Roof structure
  Engineered rafters, ridge, wall plate                £350
  Roof carpentry 1 day × £240                           £240
Roof covering
  Plain clay tile 5m² × £55                             £275
  Battens, felt, fixings                                £80
  Lead flashing to house abutment                       £180
  Tiler 1 day × £260                                    £260
Glazing
  Side glazing 2 panels × 0.9m² each                    £350
  Glazing labour                                 0.5 day £130
Composite front door                                    £850
  Door fit                                       0.5 day £180
Floor build-up + tiled finish (matching path)
  Slab and screed                                       £250
  Quarry tile finish 5m² × £75                          £375
  Tiling labour                                  0.75 day £180
First fix electrical (1 light + 1 socket)              £180
Second fix electrical                            0.25 day £80
Plaster internal (4m² ceiling + small details)         £180
Decorate                                          1 day £200
Final clean and snag                              0.5 day £120
                                                        ------
Direct cost                                             £6,648
Overhead (12%)                                          £798
Profit (28%)                                            £2,085
                                                        ------
Quote (excl VAT)                                        £9,531

This is mid-market for a quality brick porch with matched details. A PVCu equivalent would be £4,500-6,500. A stone-detailed porch with traditional joinery £14,000-18,000.

Margin traps

  1. Period brick matching. Customer wants to match an existing 1900s yellow stock brick. Sourcing is expensive — £1,200-3,500/1000 reclaimed. Get a sample and a quote before pricing.
  2. Roof tile matching. Matching existing roof tiles in a 50-year-old property is often impossible with new tile. Reclaimed tile required, premium price.
  3. Skipping survey of existing front door. Customer assumes you'll re-use it. May be 100 years old, with multiple paint layers, no insulation, draught problems. Quote a new internal door even if customer is reluctant.
  4. Building Notice not served when exemption marginal. When in doubt, serve a Building Notice — £200-400 — and protect yourself.
  5. Glazing safety glass. Forget Part K toughened-glass requirement and you have a re-do at install.
  6. Heating breach of exemption. Discussed above — protect the exemption or quote full extension.
  7. Lead flashing to existing wall. Tying in to existing brickwork needs chase cutting and lead — adds £200-500 in labour and materials. Don't skip.

Adjacent products

A £6,000 porch quote often becomes £8,500-10,000 with additions; the customer's coming to the porch project ready to spend on the entrance to their house.

Frequently Asked Questions

Do I need planning permission?

Generally no under GPDO 2015 Schedule 2 Part 1 Class D — if floor area ≤3m², height ≤3m, and at least 2m from boundary fronting a highway. Conservation areas and listed buildings have additional restrictions.

Do I need Building Regulations?

Generally no under Schedule 2 Class VII if all conditions met: ≤3m² floor area, glazing limits per Part K, original front door retained, no heating connected to dwelling's system. Most jobs fit this.

What if the customer wants the porch heated?

Use electric heating on a separate circuit (not connected to main heating) — preserves exemption. Or quote a full small extension — different scope, Part L compliance, different price band.

What's the best material for a porch?

Depends on the property. PVCu for budget; brick to match traditional brick property; hardwood for character cottage; stone for conservation. Don't put PVCu on a Victorian villa — it looks wrong and devalues the property.

How long does it take?

PVCu porch: 2-3 days. Brick porch with tiled roof: 1-2 weeks. Stone porch: 2-3 weeks.

Can I do it without scaffold?

For most porches, a tower scaffold or working platform is enough for the tile/slate work. A 3m-high porch with steep approach may need a small access scaffold — £200-400 hire.

What about security?

Porch external door should be PAS 24 certified (5-lever lock, secure cylinder, multi-point locking) — best practice and increasingly an insurance requirement. See part q security.

What if the customer wants a porch that's also a porch and a small utility?

That's an extension, not a porch. Different scope, different rules, different price.

Regulations & Standards