12 Chiltern Avenue Stone Buckinghamshire HP17 8QY

1. 6 Oct 2025

   Received by Buckinghamshire

2. 24 Dec 2025

   Decision issued: Cert of Law PROPOSED-refused

3. 4 Aug 2026

   Added to PlanIndex

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 12 Chiltern Avenue Stone Buckinghamshire HP17 8QY

  PL/26/00831/FA Submitted 27 Feb 2026 0m away

  Demolition of part of original single storey extension. Proposed part two storey, part single storey rear extension and rear dormer to roof

  Granted Full applications Extension Loft or dormer +1 7 docs
  Small domestic

• 12 Chiltern Avenue Stone Buckinghamshire HP17 8QY

  PL/25/5291/FA Submitted 5 Nov 2025 0m away

  Replacement of single storey front porch with two storey front porch.

  Granted Full applications Extension 7 docs
  Small domestic

• The Goat House 42 Bishopstone Road Stone Buckinghamshire HP17 8QX

  PL/26/06320/EU Submitted 6 Aug 2026 123m away

  80% historically approved · decision due ~1 Oct

  Certificate of lawfulness for existing use to confirm lawful implementation of planning permission 23/02549/APP through the demolition of outbuildings and garage

  Awaiting decision Demolition

• 40 Bishopstone Road Stone Buckinghamshire HP17 8QX

  PL/26/04954/FA Submitted 17 Jun 2026 123m away

  80% historically approved · decision due ~12 Aug

  Extension to existing garage to provide a double garage

  Awaiting decision Extension

• 36 Chiltern Avenue Stone Buckinghamshire HP17 8QY

  PL/26/00470/FA Submitted 21 Jan 2026 126m away

  Demolition of the existing porch and rebuild to include a shower room

  Granted Full applications Extension Demolition 7 docs
  Small domestic

• Outside 55 Chiltern Avenue Stone Buckinghamshire

  PL/25/6554/TELN Submitted 8 Dec 2025 251m away

  Notification under Regulation 5 of the electronic communications code (conditions and restrictions) Regulations 2003 (as amended) for the installation of 9M light wooden pole

  Decided Telecoms 3 docs

• PL/26/05794/SA Awaiting decision

  62 Cubb Field Aylesbury Buckinghamshire HP19 7SH

  Certificate of lawfulness for proposed dropped kerb

  10 Aug 2026 Lawful development
• PL/26/01164/SA Refused

  64 Sandholme Steeple Claydon Buckinghamshire MK18 2QE

  Certificate of lawfulness for proposed dropped kerb.

  12 Feb 2026 Lawful development
• PL/26/01589/SA Refused

  3 Corn Mill Close Wing Buckinghamshire LU7 0PL

  Certificate of lawfulness for the proposed single storey rear extension and part garage conversion.

  25 Feb 2026 Lawful development
• PL/26/05893/SA Awaiting decision

  Stamford House Boston Drive Bourne End Buckinghamshire SL8 5YS

  Certificate of Lawfulness for proposed development to confirm the lawfulness of the construction of first floor rear extension, creating additional open plan offices.

  22 Jul 2026 Lawful development
• PL/26/01721/SA Granted

  Burton House White Lion Road Little Chalfont Buckinghamshire HP7 9LP

  Certificate of lawfulness for the proposed change of use of building from Existing Office Building (Class E) to Veterinary Practice (Class E).

  2 Mar 2026 Lawful development