Planning Permission Cost UK 2025: Fees, Timescales, and What to Expect

Planning permission is one of the most misunderstood parts of home improvement in the UK. Many homeowners either avoid projects because they assume permission is needed when it isn't, or start work without permission when it is — sometimes creating serious problems at the point of sale. This guide covers exactly what permission costs, how long it takes, when you need it, and how to navigate the system efficiently.

Planning Application Fee Table (England, 2025)

Fees are set by the government and are the same across all local planning authorities in England (Scotland, Wales, and Northern Ireland have separate fee structures).

Note: fees are non-refundable even if the application is refused. A Lawful Development Certificate (LDC) is not the same as planning permission — it is a formal confirmation that a development is lawful either because it falls within permitted development rights or because an existing use has become lawful through the passage of time. An LDC is strongly recommended where you intend to rely on PD rights for a significant project.

Pre-Application Advice

Most local planning authorities offer a pre-application advice service. For householder applications, this typically costs £50–£200. For more complex schemes (commercial, multi-unit residential), fees range from £200–£1,000+.

Pre-application advice is not binding, but it is valuable. It tells you whether the authority is likely to support your proposal, what information they will require, and whether there are specific local policies that will affect the outcome. For projects in conservation areas, on listed buildings, or near sensitive sites, pre-application advice can save the cost and delay of a refused application.

Architect and Agent Fees for Preparing an Application

The planning fee itself is only part of the cost. You will almost certainly need someone to prepare the application — producing the drawings, design and access statement, heritage statement (if relevant), and other supporting documents.

For a straightforward householder application — a rear extension or loft conversion — total costs including the LPA fee are typically £800–£2,500. For a more complex scheme requiring specialist input, expect £3,000–£8,000+.

Permitted Development vs Planning Permission

A substantial amount of work on a residential property can be carried out under permitted development (PD) rights without a planning application. The key PD classes for residential properties are:

Class A — Rear and side extensions: Single-storey rear extensions up to 4m (detached) or 3m (other). Two-storey rear extensions up to 3m. Side extensions limited to half the width of the original house.

Class B — Loft conversions: Dormer extensions and roof enlargements up to 40m³ (terraced) or 50m³ (detached/semi). No front dormers on a principal elevation visible from a highway.

Class G — Outbuildings, garages, sheds: Buildings within the curtilage of the house for purposes incidental to the enjoyment of the dwelling. Must not cover more than 50% of the garden area, and must not be in front of the principal elevation.

Class Q — Agricultural to residential: Conversion of agricultural buildings to dwellinghouses in rural areas, subject to prior approval. Size limits and conditions apply.

PD rights apply to the original dwelling as built (or as it stood on 1 July 1948 if built before that date). Any extensions or alterations already made to the property count against the PD allowance. PD rights are removed entirely for listed buildings, flats and maisonettes, and in some cases for properties in conservation areas.

Determining Timescales

The statutory determination period for most applications is:

• Householder application: 8 weeks from validation
• Minor development (up to 9 dwellings): 8 weeks
• Major development (10+ dwellings, or 1,000m²+ floor area): 13 weeks

These are the statutory targets, but delays are common. Many LPAs are under-resourced and validation backlogs, requests for further information, and neighbour consultation periods can extend the process. In practice, allow 10–14 weeks for a householder application and 16–20 weeks for a minor application in a busy authority.

Applications are validated (checked for completeness) before the clock starts. Missing documents or incorrect forms add to the timeline. An experienced agent reduces validation issues.

Conservation Areas, AONBs, and Article 4 Directions

Planning rules are stricter in certain designations:

Conservation areas — PD rights for cladding, roof tiles, windows, and some extensions are removed. Any development that would affect the character or appearance of the area requires either full planning permission or prior approval.

Areas of Outstanding Natural Beauty (AONBs) and National Parks — PD rights for extensions are restricted (maximum 10m² for a side or rear extension, no two-storey extensions).

Article 4 directions — a local planning authority can withdraw specific PD rights in a defined area by making an Article 4 direction. This is common in conservation areas, some HMO-heavy areas, and local heritage zones. Check with your LPA before assuming PD applies.

Listed buildings — all alterations that affect the character of a listed building require Listed Building Consent, in addition to planning permission where required. Internal as well as external works are covered. Consent is free but the heritage assessment process adds professional cost.

What Happens if Your Application is Refused

A planning refusal is not the end of the road. Common reasons for refusal include:

• Impact on the character and appearance of the area
• Overlooking or loss of privacy to neighbours
• Overshadowing (loss of daylight/sunlight)
• Overdevelopment of the site
• Non-compliance with local planning policy

You have three options after refusal:

1. Resubmit with modifications that address the reasons for refusal. The first resubmission within 12 months of the original decision is free.
2. Appeal to the Planning Inspectorate. Appeals are free to submit, but you will typically need a planning consultant (£2,000–£5,000+). Most householder appeals are decided by written representations within 12–16 weeks. The success rate for householder appeals is approximately 35–40%.
3. Accept the decision and pursue a revised design or alternative approach.

Pre-application advice significantly reduces the risk of refusal by allowing you to understand the authority's concerns before committing to a formal application.

Choosing Between Permitted Development and Full Planning

For most straightforward residential projects, PD is the faster, cheaper route — no fee, no neighbour consultation delay, no risk of refusal. However, it comes with constraints, and if you plan to sell the property, you should obtain a Lawful Development Certificate to formally confirm that the development was lawful. This costs £258 and provides a legal record for buyers' solicitors.

Full planning permission is required where PD does not apply (listed buildings, conservation areas, Article 4 areas), where the scale exceeds PD limits, or where you are creating a new dwelling or making a material change of use.

The Planning Portal (planningportal.gov.uk) is the authoritative source for PD rules and application forms. The DLUHC (Department for Levelling Up, Housing and Communities) publishes the full permitted development order and updates to fee regulations.

Next Steps

1. Use the Planning Portal's interactive house tool to check whether your project is likely to fall within permitted development.
2. If in any doubt, seek pre-application advice from your local planning authority.
3. Obtain a Lawful Development Certificate for any significant PD project.
4. For a full application, appoint a RIBA architect or experienced planning agent and budget £1,500–£3,000 for their fees plus the £258 application fee.
5. Allow at least 10–14 weeks from validation for a decision.

The Renovate Me platform helps you plan your renovation project from the start — including flagging when planning permission is likely to be needed and sequencing your steps correctly.