Do I need planning permission for a porch in North Somerset?

Usually not, as long as it's under 3m², under 3m high, and at least 2m from the highway. Listed buildings are the exception — they always need consent.

How much does a porch cost?

A porch in South West England typically costs between £4,500 and £13,000, depending on materials. A simple UPVC porch is at the low end, a brick-built porch with a tiled roof at the higher end.

What is the maximum size for a porch under permitted development?

The maximum ground floor area is 3 square metres, with a maximum height of 3 metres.

Do I need Building Regulations approval for a porch?

In most cases, no. Porches are usually exempt from Building Regulations provided they are at ground level, under 30m², and have glazed walls.

Porch in North Somerset: Planning Permission Guide

Everything you need to know about building a porch in North Somerset — PD rules, costs, and when you need planning permission.

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Porchs in North Somerset at a glance

100%

approved

£548

application fee

weeks typical

Based on 22 decided applications in North Somerset over 12 months (22 granted, 0 refused).

North Somerset borders or partially overlaps the Mendip Hills AONB — properties near those boundaries are on Article 1(5) land where permitted-development rights are restricted. North Somerset has 78 conservation areas — extensive heritage coverage restricting external alterations across many streets. 74 Article 4 directions are in force — pre-application advice strongly recommended before any external work. 4,314 listed buildings recorded.

Council planning portal Pre-application advice

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Approval probability, 5 nearest comparables, refusal reasons — for your specific address.

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Recent porch decisions in North Somerset

The 5 most recent decided applications. Addresses redacted to postcode area.

Granted

Proposed erection of a single-storey porch extension and access ramp.

BS242026-05-22

Granted

Demolition of existing porch and proposed erection of new larger flat roof porch extension.

BS212026-05-19

Granted

Proposed re-modelling of the rear two storey extension facade, works to include:- the addition of vertical Timber cladding to the first f…

BS212026-05-19

Granted

Certification of Lawful Development for the erection of a front porch extension and creation of pitched roofing atop existing front exten…

BS222026-04-27

Granted

Proposed erection of a front porch extension.

BS482026-04-22

These are borough-wide. See the 5 nearest to your address.

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Permitted Development Rules

Class DPart 1

Porches

GPDO 2015, Schedule 2, Part 1, Class D

Porches are covered by Part 1, Class D of the GPDO. They have simple, clear rules: stay under 3 square metres, under 3 metres high, and at least 2 metres from the highway.

Key dimension limits

Max 3m² footprintMax 3m heightMin 2m from highway

These are the maximum GPDO limits for a detached house with no constraints. Your actual limits depend on your property type, location, and any planning restrictions.

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Typical Costs in South West England

Porches are one of the more affordable home improvements, with costs depending mainly on materials and design.

PorchSouth West England

Cost per m²

£1,550–£2,600

construction rate

Typical total

£4,500–£13,000

Based on 2–4 m²

Typically includes

FoundationsStructureRoofDoorBasic finishes

Typically excludes

Planning application feeBuilding regs fee

Costs depend heavily on materials and finish — a simple UPVC porch is at the low end, brick-built with tiled roof at the high end.

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Which Professionals Do You Need?

Porches are relatively simple structures. In most cases, a builder can handle the project without needing an architect.

A draughtsperson or architectural technician can prepare any drawings needed. A full architect may not be necessary.

Architect / designerOptional

Porches are simple structures. A builder or draughtsperson can usually prepare any drawings needed.

Typical fee: £500–£1,500 (Basic drawings)

Structural engineerNot needed

Party wall surveyorOptional

May apply if the work is within 3 metres of a shared boundary. Check with your builder.

Typical fee: £700–£1,500 (per neighbour (if applicable))

Planning consultantNot needed

This guidance is based on a typical semi-detached house with no special constraints. Listed buildings, conservation areas, and attached properties may require additional professional input.

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Conservation Areas & Listed Buildings

In conservation areas, the same PD rules apply to porches, but you should use materials sympathetic to the area character.

Conservation areas

Properties in conservation areas often have reduced permitted development rights. Some project types (like side extensions) lose PD rights entirely. An Article 4 Direction can remove additional PD rights.

Listed buildings

Listed buildings (Grade I, II*, or II) have no permitted development rights at all. Any external alteration requires Listed Building Consent in addition to any planning permission. An architect experienced in heritage work is essential.

Check if your property is in a conservation area or has other planning constraints.

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Frequently Asked Questions

Just want a quick yes/no for your porch?

Run our free 2-minute check to see whether your project likely qualifies as permitted development in North Somerset. For personalised approval odds and nearby comparables, get the full report above.

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Fence, wall or gate

GPDO Class A (Part 2)

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