Do I Need Planning Permission? (2026 UK Guide)
A great deal of home improvement work is permitted development (PD) — it can go ahead without a planning application. But PD has strict limits, and once you exceed them (or you own a flat, a listed building, or a home in a conservation area or Article 4 zone) you'll usually need to apply for planning permission. Planning is also completely separate from Building Regulations, which cover structural safety. Here's how it works in England & Wales in 2026 — and how an architectural designer gets it approved for you.
Do you need planning permission? — 2026 quick answer
- Often no: many extensions, loft conversions, outbuildings, drives, porches & solar panels are permitted development
- Usually yes: work beyond PD size limits, most two-storey & front extensions, anything facing a highway, or a change of use
- Always check first: flats/maisonettes (no PD), listed buildings (listed building consent), conservation areas & Article 4 directions
- Different thing entirely: Building Regulations cover structure, fire & insulation — most building work needs them even when it's PD
- Prove it's legal: a Lawful Development Certificate (~£129) confirms your project is PD
- Householder planning fee (England, 2026): around £258, with an 8-week target decision
The safest route is simple: confirm your PD limits (or get a Lawful Development Certificate), and if you're over them, have an architect or architectural designer draw up and submit the application. A good designer knows what your local authority will pass first time.
Planning permission vs Building Regulations
These are two separate approvals and it's the single biggest source of confusion. Planning permission is about whether you can build something at all — its size, appearance and impact on neighbours and the street. Building Regulations are about whether the work is safe and sound — structure, fire safety, insulation, drainage and ventilation.
A project can be permitted development (no planning needed) but still require Building Regulations approval — a rear extension, a loft conversion or a knock-through are classic examples. Conversely, a like-for-like repair may need neither. Always ask which of the two your job triggers, because a builder who ignores Building Control can leave you unable to sell the house.
When permitted development doesn't apply
Permitted development rights are removed or reduced in several situations, so always check before you rely on them:
- Flats and maisonettes have no permitted development rights — almost any external change needs permission.
- Listed buildings need Listed Building Consent for most changes, inside and out — separate from planning permission.
- Conservation areas, National Parks and AONBs restrict PD (e.g. side extensions, cladding, some outbuildings).
- Article 4 directions can strip normal PD rights on a specific street — your council's website lists them.
- Your home may already have had its PD rights removed by a condition on an earlier permission (common on newer estates).
Need Drawings or a Planning Application?
An architectural designer can confirm whether you need permission, prepare the drawings and submit the application for you. BestBuilders matches you with up to 3 vetted architects & designers — free, no obligation.
Frequently asked questions
Related Guides
More guides to help you plan and budget.
Architectural Services & Fees
What architects and designers charge for drawings and planning applications.
Read Guide →Do I Need Planning Permission for an Extension?
The permitted-development limits for extensions in 2026.
Read Guide →Sources used in our 2026 figures
- gov.uk — Planning permission (England & Wales)
- Planning Portal — Permitted development rights
- gov.uk — Listed buildings and conservation areas
Methodology: Guidance reflects England & Wales permitted-development and planning rules current at June 2026. Permitted development limits, Article 4 directions and conservation-area rules vary locally — always confirm with your local planning authority. Last updated .