How to object to a planning application in 2026

The step-by-step method for a planning objection that a council officer will weigh: find the application, know the deadline, argue only material considerations, cite the adopted policies, and submit it the right way.

What an objection can and cannot do

A planning objection is a written representation to the local planning authority. The case officer must read it, summarise it in the report, and weigh any material planning consideration it raises against the adopted local plan and national policy. An objection cannot veto an application, and the number of objections matters far less than their content. One letter that identifies a real conflict with an adopted policy outweighs fifty that say the scheme is unwanted.

Step 1: find the application and the deadline

Every application is published on the council's planning portal with a reference number (for example 26/00663/FPH), the proposal description, the plans, and a comments-by date. The reference is on the letter the council sent you or on the site notice on a lamppost near the site. Neighbour consultation normally runs for 21 days from the date of that letter. Enter the reference on Curtilage and it shows the closing date and links to the plans.

Step 2: read the drawings, not just the description

Objections fail when they argue with the description rather than the drawings. Open the proposed elevations and the block plan. Note the depth of the extension from the rear wall, its height at the eaves and ridge, its distance from your boundary, and every window or door facing your property. These are the facts your letter is built on.

Step 3: decide which material considerations apply

The officer can weigh only certain things. The ones neighbours most often have a real case on are: overlooking and loss of privacy, loss of daylight or sunlight, an overbearing effect or loss of outlook, harm to the character and appearance of the area, highway safety and parking, noise and disturbance from the use, harm to heritage assets, loss of trees, and flooding or drainage. Pick the two or three that are true for you. See the guide on material planning considerations for the full list and the things that carry no weight.

Step 4: cite the policy, correctly

Every council has an adopted local plan with numbered policies on design and residential amenity, and national policy sits alongside it (in England the National Planning Policy Framework, August 2026 edition). Naming the right policy tells the officer you have made the argument in the terms the decision must be made in. Naming the wrong one, or one from a different council, or a paragraph number from a superseded edition, tells the officer to discount the letter. Councils reported in 2026 that most AI-written objections do exactly that. Curtilage cites only policies that exist in its database for your council and checks every citation before you see the letter.

Step 5: be specific and short

Officers read hundreds of these. Four hundred to seven hundred words is plenty. Use a heading per ground. State the fact from the drawings, the effect on your home, and the policy engaged. "The proposed flank wall is 3 metres from my kitchen window and runs the full 3 metre depth of the extension, so it would enclose the only window serving that room, contrary to Policy GD1(e)" carries weight. "It will spoil the area" does not.

Step 6: ask for something

End with what you want: refusal, or if the council is minded to approve, specific conditions (obscure glazing to a flank window, a reduced depth, hours of use, a landscaping scheme). Conditions are often where a neighbour actually wins.

Step 7: submit with your name and address

Comments must carry your name and address or they are disregarded. Submit through the comment link on the application's portal page, or by email to the planning department quoting the reference. Keep a copy. You will be able to see your comment on the portal within a few days.

After you submit

You may be notified of the decision. If the application goes to committee you can usually ask to speak for three minutes. If permission is granted, there is no third-party right of appeal in England; the applicant can appeal a refusal, but neighbours cannot appeal an approval, which is why the written objection is the moment that matters.

Updated 2026-09-14. Curtilage is not legal advice.