How long does a planning application take in the UK?

The short answer

In England, councils are expected to decide a householder planning application within 8 weeks of it being validated. Larger or more complex applications have a 13-week target, or 16 weeks if an Environmental Impact Assessment is needed. Wales and Scotland have similar but not identical timescales, so check with your local authority if you're outside England.

Those clocks only start once the application is valid, so in practice you should allow 10 to 12 weeks in total from submission to decision for a straightforward project — longer if the council asks for changes.

The stages, step by step

• Preparing your drawings and forms — usually a few days to a couple of weeks, depending on how quickly you can supply measurements and decide on the design.
• Validation — the council checks you've supplied everything required, and the fee. This commonly takes a few days to two weeks, and it's where many applications stall.
• Consultation — neighbours are notified and the application is published. Neighbours and consultees typically have 21 days to comment.
• Assessment — the case officer reviews the plans against local and national policy, often visits the site, and may ask for amendments.
• Decision — most householder applications are decided by the case officer under delegated powers. Some go to a planning committee, which can add several weeks.

Validation — the stage people underestimate

The 8-week clock does not start when you press submit. It starts when the council confirms the application is valid. If something is missing — a drawing, the wrong scale, an incomplete site plan, an unpaid fee — the council will contact you and the clock stays at zero until it's fixed.

Common reasons for invalid applications include:

• Drawings with no scale bar, or a scale that doesn't match the paper size
• A site or location plan without the red line boundary, or with the wrong area outlined
• Missing existing drawings, so the council can't see what's changing
• Floor plans and elevations that don't agree with one another
• The wrong ownership certificate or no notice served on another owner

Our Drawing Checker is a quick way to catch the most common problems before you submit.

What causes delays

Even a simple application can run past eight weeks. The usual causes are:

• Requests for amendments — if the officer has a concern, such as overlooking or a height issue, they may ask you to revise the design. Each round adds time.
• Neighbour objections — a handful of comments rarely cause problems, but a large number can push a decision to committee.
• Conservation areas and listed buildings — extra consultees, such as a conservation officer, add time.
• Protected species or trees — surveys can be seasonal, and may mean waiting for the right time of year.
• Council resourcing — some planning departments are simply busier than others.

If the council needs longer, it will usually ask you to sign an extension of time agreement. This is common and not a bad sign in itself — but it is optional, and it's worth asking why.

Routes that are quicker

• Permitted development — if your project falls within permitted development, you don't need a full application at all, and can often start work straight away.
• Prior approval — certain larger home extensions need a prior approval application, which is decided within 42 days. We cover the details in our permitted development guide.
• Lawful Development Certificate — to prove that permitted development applies, councils aim to decide LDC applications in around 8 weeks, which is useful when selling or remortgaging.

If your application is refused

A refusal adds time, but isn't always the end of the road. You can:

• Amend and resubmit — many councils allow one free resubmission of a similar scheme within 12 months of the decision, but check your council's rules.
• Appeal — for a householder refusal you generally have 12 weeks from the decision date to appeal to the Planning Inspectorate, and the appeal itself takes additional months.

Reading the officer's report closely is the best way to decide which route makes sense, and a small redesign often resolves the objection faster than an appeal.

After approval

Planning permission is normally valid for three years, so you must begin work within that period. Remember that planning is separate from building regulations, which have their own process, and that any conditions attached to your approval may need to be discharged before work starts. Building control can run alongside planning if you've finalised your design, which saves time overall.

How to keep things moving

• Get accurate, scaled drawings — they are the single biggest cause of invalid applications.
• Check planning history on your property for conditions or earlier refusals.
• Talk to your neighbours before they hear about it from a council letter.
• Use pre-application advice for anything borderline — it costs a little but can save months.
• Reply promptly when the case officer contacts you, as a slow response can stall the whole process.

Summary

Expect a householder planning application to take around 10 to 12 weeks from start to finish: a few days to prepare, up to two weeks to validate, and then the 8-week decision period. Delays almost always come from missing information or requests for changes, both of which good drawings and early preparation can reduce.

If you have your measurements, we can produce council-ready floor plans, elevations and site plans quickly and at a fixed price, helping your application be validated first time.