A refusal containing two reasons can feel difficult to challenge. But the number of objections matters less than whether they stand up to scrutiny. In this Feltham extension appeal, neither of them did.
The property is a semi-detached house in Feltham. Its owners wanted to enlarge it with a two-storey side extension in place of the garage, a single-storey extension across the rear and a smaller first-floor rear addition.
It was the kind of wraparound scheme often proposed by a growing family that needs more space but would rather improve its home than move. Hounslow Council refused planning permission.
Why Hounslow refused the extension
The first reason concerned the design and its effect on the character of the house and street.
Hounslow argued that the proposal did not follow its residential extension guidance in every respect. In particular, the side extension came forward to the front of the house at ground-floor level instead of being set back.
The second reason concerned access. The council referred to its policy on vehicle crossovers—the dropped kerbs that allow cars to cross the pavement and enter a driveway.
The appeal was therefore based on two separate questions: whether the extension was well designed and whether the property would have safe and suitable access.
Why the design objection failed
Although the ground-floor extension was not set back, the first floor was set back by a metre. The extension also had a hipped roof positioned below the main roof, making it visibly secondary to the original house.
A gap remained between the extension and the side boundary. The two semi-detached houses would also retain their different roof forms, avoiding the impression that they were merging to create a terrace.
The inspector considered the proposal in the context of the street, where there were already numerous extensions. Despite departing from parts of Hounslow’s guidance, the extension would still respect the character of the house and the surrounding area.
This was an important point. Design guidance should not be applied as a rigid checklist. Its purpose is to secure well-designed development, and a proposal can sometimes meet that underlying purpose even where it does not comply with every individual recommendation.
Why the access objection failed
The council’s second reason proved less substantial.
The proposal did not include a new vehicle crossover. It would continue to use the access already serving the property.
The position of the front door would also improve. Moving it to the front of the house would bring it closer to the street and place it in clear view of the driveway.
The inspector therefore found no unacceptable effect on either vehicle or pedestrian access and rejected the council’s second objection.
The appeal was allowed
The inspector allowed the appeal in March 2026, subject to conditions.
The decision meant that the family could proceed with the extension Hounslow had refused on both design and access grounds.
What this appeal shows
A refusal based on local design guidance is not necessarily the end of an extension proposal. The important question is whether the development would cause the harm the guidance is intended to prevent.
The same applies to parking and access objections. Where a proposal retains an existing crossover and does not make access less safe or convenient, a highways reason for refusal may be open to challenge.
Every property and proposal is different. But where an extension remains secondary to the original house, fits comfortably into its street and creates no genuine access problem, an appeal may have strong prospects.
Has Hounslow refused your extension?
If Hounslow has refused your extension because of its design, parking, access—or a combination of reasons—send us the decision notice and plans for a free initial assessment.
We will tell you honestly whether we think an appeal is worth pursuing. If it is, our fixed fee for a suitable Part 1 appeal is £399, and we win more than half of the appeals we take on.
You can also read more about planning appeals in Hounslow.