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Planning application

55 Rupert Avenue High Wycombe Buckinghamshire HP12 3NF

Granted Buckinghamshire PL/25/4646/SA Certificate of Lawful Use - Proposed

Works: Extension Loft or dormer Small domestic

Read from the description, not a valuation. How we read the register

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Certificate of Lawfulness for proposed single storey rear extension, single storey side extension and loft conversion and new front porch

As published by the council, reference PL/25/4646/SA

Application record

Reference
PL/25/4646/SA
Type
Certificate of Lawful Use - Proposed
Status
Decided
Decision
Granted As published: Cert of Law PROPOSED-granted
Received
16 Oct 2025
Validated
16 Oct 2025
Decided
5 Feb 2026
Ward
Abbey
Parish
High Wycombe Unparished Area
Decision by
Delegated Decision
Postcode
HP12 3NF

Site history

Applications at this address on the Buckinghamshire register

This site has had 2 applications since 2025: 2 approved, 0 refused.

  • PL/25/4647/PNE Granted

    55 Rupert Avenue High Wycombe Buckinghamshire HP12 3NF

    Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear extension (depth extending from the original rear wall of 6.00 metres, maximum height 4.00 metres, eaves height 3.00 metres)

    Decided 26 Nov 2025

Timeline

Dates from the published record

  1. 16 Oct 2025

    Received by Buckinghamshire

  2. 5 Feb 2026

    Decision issued: Cert of Law PROPOSED-granted

  3. 4 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Oxbridge Design Agent, a design practice

43 applications on PlanIndex · across 6 councils · 78% granted

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Documents

Plans, drawings, consultee responses and the officer's report

10 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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What this grant of permission means

Buckinghamshire granted permission on 5 February 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 55 Rupert Avenue High Wycombe Buckinghamshire HP12 3NF

    PL/25/4647/PNE Submitted 16 Oct 2025 50 yards away

    Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear extension (depth extending from the original rear wall of 6.00 metres, maximum height 4.00 metres, eaves height 3.00 metres)

    Granted Extension 8 docs
    Small domestic

  • 36 Cressex Road High Wycombe Buckinghamshire HP12 4TY

    PL/26/01393/SA Submitted 19 Feb 2026 50 yards away

    Certificate of lawfulness for the proposed conversion of the existing roof space into a habitable room following a hip to gable extension, rear dormer window and velux roof windows to the front roof slope.

    Granted Lawful development Extension Loft or dormer +1 8 docs

  • 36 Cressex Road High Wycombe Buckinghamshire HP12 4TY

    PL/26/01351/PNE Submitted 18 Feb 2026 50 yards away

    Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear extension (depth extending from the original rear wall of 6.00 metres, maximum height 2.90 metres, eaves height 2.60 metres)

    Granted Extension 7 docs
    Small domestic

  • 36 Cressex Road High Wycombe Buckinghamshire HP12 4TY

    PL/26/05238/FA Submitted 15 Jul 2026 100 yards away

    85% historically approved · decision due ~9 Sep

    Demolition of the existing single-storey side extension and garage, and erection of a single-storey front extension to form a porch, a two-storey side extension, and a part two-storey rear extension.

    Decided Extension Demolition 9 docs
    Small domestic

  • 56 Rupert Avenue High Wycombe Buckinghamshire HP12 3NF

    PL/26/07585/SA Submitted 21 Sep 2026 100 yards away

    85% historically approved · decision due ~16 Nov

    Certificate of Lawfulness for proposed demolition of existing outbuildings and creation of single storey garden outbuilding.

    Awaiting decision Demolition
    Small domestic

  • 67 Rupert Avenue High Wycombe Buckinghamshire HP12 3NF

    PL/26/06622/FA Submitted 17 Aug 2026 100 yards away

    85% historically approved · decision due ~12 Oct

    Two storey side extension; part single, part two storey side/rear extension; front porch following part demolition of existing garage including alterations (planning ref: PL/26/05730/PNE) to dwelling house.

    Decided Extension Demolition 11 docs
    Small domestic

In Buckinghamshire

  • PL/26/01937/SA Granted

    63 Ingram Avenue Aylesbury Buckinghamshire HP21 9DJ

    Certificate of lawfulness for proposed dropped kerb.

    Received 18 Mar, published by the council 17 Sep 2026 Lawful development
  • PL/26/02452/SA Granted

    217A Desborough Avenue High Wycombe Buckinghamshire HP11 2TW

    Certificate of lawfulness for the proposed erection of an outbuilding.

    Received 25 Mar, published by the council 25 Sep 2026 Lawful development
  • PL/26/00836/SA Granted

    33 South View Downley Buckinghamshire HP13 5UL

    Certificate of lawfulness for the proposal to create new access at the front of the property.

    Received 2 Feb, published by the council 4 Aug 2026 Lawful development
  • PL/26/07553/SA Awaiting decision

    4 Marlborough Road Aylesbury Buckinghamshire HP21 8AU

    Certificate of Lawfulness for proposed new vehicular crossover (dropped kerb) to 4.6m total width including transition kerbs, with associated enlargement of the opening in the front boundary wall, and formation of a permeable hardstanding within the front garden to provide off-street parking for the existing dwellinghouse. Works are engineering/building operations as defined by s55 TCPA 1990. No change of use is proposed; the dwelling remains in Use Class C3. Existing drop kerb reinstated.

    Received 18 Sep, published by the council 3 Oct 2026 Lawful development
  • PL/26/07397/EU Awaiting decision

    22 Priory Road High Wycombe Buckinghamshire HP13 6SL

    Certificate of lawfulness for existing use of property as a block of eight self-contained flats, each falling within use class C3.

    Received 14 Sep, published by the council 3 Oct 2026 Lawful development