Do I need planning permission for a porch?

In most cases, no. A porch is permitted development if it is less than 3m² in ground area, less than 3m high, and is more than 2m from the boundary of the highway. If your property is in a conservation area or is listed, different rules apply.

Does a porch need building regulations?

A small porch under 30m² that is separated from the house by an external-quality door does not need building regulations approval. However, if the porch replaces the existing external door as the main thermal envelope, building regulations apply.

Is uPVC or brick cheaper for a porch?

A uPVC porch is significantly cheaper than a brick-built porch. A uPVC lean-to porch of around 2m² typically costs £3,000–£5,000 installed. A matching brick-built porch of the same size typically costs £6,000–£10,000.

Can I add a door to an existing porch?

Yes — replacing an existing front door or adding an inner door to an open porch can be done separately for £800–£2,500 depending on the door style and glazing.

How Much Does a Porch Cost in the UK?

Adding a porch is one of the most affordable home improvements, providing a practical entrance lobby, improving kerb appeal, and adding a degree of draught and security to the front door. Costs vary depending on size, materials, and whether you opt for a simple uPVC lean-to or a fully brickbuilt structure.

Typical Cost (UK, 2026)

£3,000 — £12,000

All costs are indicative estimates. Obtain at least 3 quotes from qualified builders. Prices exclude VAT (20%).

Factors Affecting the Cost

Size

A small porch of 1.5m × 1.5m costs significantly less than a generous 3m × 2m entrance lobby.

Materials

uPVC is cheapest; timber is mid-range; full brick-and-block with rendered or tiled finish is most expensive.

Glazing

Double-glazed units add cost. A largely glazed front elevation costs more than solid walls with one window.

Roof type

A simple lean-to roof is cheapest. A pitched or hipped roof with tiles to match the house costs more.

Electrics

Adding a light fitting and power socket requires an electrical first fix, adding £300–£600.

Cost Breakdown

Item	Basic	Mid-range	High-end
Base (concrete slab or slabs)	£400	£700	£1,200
Walls or frame (uPVC / timber / brick)	£800	£2,500	£5,000
Glazing	£500	£1,200	£3,000
Roof	£600	£1,500	£3,000
Door (external and internal)	£400	£900	£2,000
Electrics (lighting and socket)	£300	£450	£700

Costs are indicative and exclude VAT. Regional variations apply.

Typical Timeline

1–2 weeks

Frequently Asked Questions

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