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Planning application

80128/APP/2026/1465

18 DIAMOND ROAD RUISLIP HA4 0PG

Decided Hillingdon Full

Proposal

Conversion of roof space to habitable use to include a rear dormer with Juliette balcony, 1 x front roof light and conversion of roof from hip to gable end, erection of outbuilding to rear garden, and installation of air source heat pump. (Application for a Certificate of Lawful Development for a Proposed Development)

As published by the council, reference 80128/APP/2026/1465

Timeline

Dates from the published record

  1. 15 Jun 2026

    Received by Hillingdon

  2. 26 Jul 2026

    Added to PlanIndex

After the decision

The process from here

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

About full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

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Within 500 metres

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