Most conservatories in England are built under permitted development and never reach a planning officer, but where an application is needed, neighbours are invited to comment. Not every objection carries weight in the decision. This guide summarises what government planning guidance says about consultation and material considerations in England. Scotland, Wales and Northern Ireland run their own planning systems and are not covered. It is general information, not legal or planning advice.

Who can comment on an application

Government guidance on consultation states that anyone can respond to a planning consultation. That includes neighbours directly affected as well as community groups and interest groups. Before a decision is made, the council must run a formal period of public consultation under the Development Management Procedure Order.

The guidance says the comment period is set out in the publicity that accompanies the application and will be not less than 21 days, or 14 days where a notice is published in a newspaper. For an application that is not a major development, which would include a typical householder conservatory scheme, the statutory publicity table lists a site notice or a neighbour notification letter, plus publication on the council’s website. Councils have discretion to do more, and their Statement of Community Involvement may set out further detail.

Timing of comments

The same guidance says comments should be made before the statutory deadline so that they are taken into account. A council may, at its discretion, consider comments received after the closing date, but it has no obligation to do so. The council also may not determine the application before the consultation period has expired, and it must add a day for each public holiday in the prescribed circumstances listed in the guidance.

What counts as a material planning consideration

Guidance on determining planning applications defines a material planning consideration as one that is relevant to the decision in question, such as whether to grant or refuse permission. It says the scope of what can be material is very wide, so the courts often do not say what cannot be. Even so, the courts have generally taken the view that planning is concerned with land use in the public interest.

On that basis, the guidance says the protection of purely private interests, such as the effect of a development on the value of a neighbouring property or the loss of private rights to light, could not be material considerations. A neighbour whose main worry is a fall in property value therefore raises a point the council is not expected to weigh. The separate legal route on light is explained in this site’s guide to right to light.

Weight and the development plan

The guidance draws a clear line between whether a consideration is material and how much weight it deserves. Provided the decision maker has regard to all material considerations, it is for the decision maker to decide the weight of each, and the courts will not generally interfere with weight, subject to a test of reasonableness.

Decisions must also be taken in accordance with the development plan unless material considerations indicate otherwise, citing section 70(2) of the Town and Country Planning Act 1990 and section 38(6) of the Planning and Compulsory Purchase Act 2004. The National Planning Policy Framework is described as a material consideration where relevant. A council may depart from development plan policy where material considerations indicate that the plan should not be followed.

How opposition is treated

Where councillors decide an application, the guidance says they must keep an open mind and may take into account only material planning considerations, which can include public views where those relate to relevant planning matters. It adds that local opposition or support is not in itself a ground for refusing or granting permission unless it is founded on valid material planning reasons. The number of objection letters therefore does not decide the outcome; the planning substance within them matters. Many councils delegate simpler applications to officers, and the guidance says delegation arrangements are a matter for each council.

If the applicant disagrees with the outcome

A refusal can be challenged by the applicant through the appeal route described in this site’s guide to householder planning applications. Where a conservatory falls within permitted development and needs no application, neighbours are not consulted in the same way, although the party wall process may still apply; see the Party Wall Act guide.

FAQs

Can anyone object to a neighbour’s conservatory application?

Government guidance says anyone can respond to a planning consultation, but the council can weigh only material planning considerations in its decision.

Is a drop in my property’s value a valid objection?

Guidance says the courts have generally taken the view that the impact on the value of a neighbouring property is a purely private interest that could not be a material consideration.

Does a large number of objections stop a conservatory?

No. According to the guidance, local opposition is not in itself a ground for refusal unless it is founded on valid material planning reasons.

Can I comment after the deadline?

A council may, at its discretion, take late comments into account but has no obligation to do so.

The bottom line

Neighbours can comment on an English planning application, and a council must consult before deciding. The council may weigh only material planning considerations, which concern land use in the public interest, not property values or private rights to light. Comments made within the consultation period and focused on planning substance are the ones most likely to influence the outcome, and the weight given to each point is the decision maker’s judgement.

Sources

This guide draws on the following sources, current as of 25 September 2026:

• GOV.UK, “Consultation and pre-decision matters” (Planning Practice Guidance)
• GOV.UK, “Determining a planning application” (Planning Practice Guidance)

Related guides

Compare Conservatories is an independent guide. We may earn a fee from some links; this never affects what we write. This article is general information, not legal or planning advice on any specific property — always confirm requirements directly with your local planning authority.