Why Planning Applications Are Refused in London — and How to Turn a Refusal Around

A planning refusal can feel like a dead end, particularly when you have invested time in a London extension, loft conversion or flat conversion. It does not necessarily mean the project is impossible. The important question is whether the council objects to the principle of development, the design or the evidence submitted.

At Simplicity Designs, we start with the decision notice and officer’s report. Together, these explain what went wrong and help us identify whether a revised planning application or an appeal offers the more sensible route.

Why do London councils refuse planning applications?

Planning decisions are generally made in accordance with the development plan unless material considerations indicate otherwise. In London, that includes the London Plan and the borough’s adopted local plan. The National Planning Policy Framework is also a material consideration.

Common reasons for refusal include:

• Harm to neighbours: overlooking, loss of privacy, reduced daylight or an overbearing relationship with adjoining homes.
• Excessive scale or poor design: an extension or roof addition that appears too bulky or conflicts with the character of the building or street.
• Heritage impact: harm to a listed building, its setting or the character and appearance of a conservation area.
• Unsuitable accommodation: proposed flats or HMOs with inadequate space, daylight, outlook or amenity provision against applicable policies.
• Missing supporting evidence: insufficient information about matters such as flood risk, trees, transport, noise or heritage significance.

Neighbour objections can highlight genuine planning issues, but an application is not decided by a vote. We distinguish material concerns from matters that normally sit outside planning, such as private boundary disputes or the effect on property values.

Read the refusal before changing the drawings

A refusal notice may list several reasons, and each needs a clear response. Reducing an extension’s depth will not necessarily resolve an objection about its height, window position or impact on a listed building.

We compare the reasons against the submitted drawings, relevant policies and the officer’s assessment. We also check the planning history and any consultation responses. This helps separate objections that can be addressed through design changes from those requiring specialist evidence or a different development strategy.

A missing document may prevent an application being validated at the outset. Alternatively, an application may be validated but later refused because the evidence does not demonstrate that its effects are acceptable. Those situations need different responses.

When a revised application makes sense

Resubmission is often worth considering when the council has identified specific, workable changes. These might include setting a roof extension back, repositioning windows, reducing bulk near a boundary or improving the layout of proposed flats.

We aim to make targeted changes rather than strip away useful space without a clear reason. A supporting planning statement should explain how the revised proposal addresses every refusal reason, with additional reports where necessary.

Pre-application advice can help test a revised approach, although it is not a guarantee of permission. We check current submission requirements and any applicable fees rather than assume a repeat application will be free.

When should you appeal a planning refusal?

An appeal may be appropriate where we consider the proposal acceptable and the council’s reasoning open to challenge. In England, planning appeals are handled by the Planning Inspectorate.

Appeal procedures and deadlines vary by application type and circumstances. Householder appeals generally have a shorter deadline than many other planning appeals, so we check the decision notice and current Planning Inspectorate guidance promptly.

An appeal is not normally the place to introduce a substantially redesigned scheme. We weigh the policy arguments, evidence, timescale and alternatives before recommending a route. Neither an appeal nor a resubmission guarantees approval.

Plan the next step with confidence

Established in Hackney in 2008, our team handles planning applications, planning statements and appeals across a range of residential and commercial projects. We focus on a practical response to the actual reasons for refusal.

If your London planning application has been refused, call us on 0203 026 2883 or send your details, decision notice and drawings to info@simplicity-designs.co.uk.