1 The Chestnuts Main Street Grendon Underwood Buckinghamshire HP18 0UH

1. 1 Sep 2026

   Validated

   Checked as complete and ready for consideration.

2. 1 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 27 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Buckinghamshire took a median of 58 days over the applications it decided in the last year.

This application is with Buckinghamshire for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

This page mirrors an entry on the statutory planning register that Buckinghamshire is required to keep. The published feed for this record does not state which type of application it is, which is common for older entries and for some council systems; the register entry on the council portal will say, alongside the case officer and any consultation dates.

Every planning application follows the same broad path: submission, validation, publicity, then a decision by officers or committee. Our guide to planning application types explains the common types and what each can approve.

• 9 Darleys Close Grendon Underwood Buckinghamshire HP18 0SE

  PL/26/06583/FA Submitted 2 Sep 2026 97m away

  80% historically approved · decision due ~28 Oct

  Householder application for the construction of a single storey rear extension (to replace existing conservatory), porch to front including new roof over existing bay window and ancillary building to front (to replace existing garage).

  Awaiting decision Extension Roofing +1
  Small domestic

• 1 Grange Gardens Main Street Grendon Underwood Buckinghamshire HP18 0UD

  PL/25/6207/FA Submitted 8 Dec 2025 118m away

  Proposed double garage.

  Granted Full applications 4 docs

• The Manor Main Street Grendon Underwood Buckinghamshire HP18 0SW

  PL/25/5318/FA Submitted 17 Dec 2025 160m away

  Internal and external alterations to existing outbuilding comprising replacement windows, removal of 1 no. existing front dormer and installation of 3 no. front dormers and repairs to roof with replacement roof tiles.

  Granted Full applications Loft or dormer Roofing +1 5 docs

• Studley House Main Street Grendon Underwood Buckinghamshire HP18 0SL

  PL/26/00381/VRC Submitted 11 Feb 2026 226m away

  Variation of conditions 2 (plans) and 3 (external materials) of planning permission 23/02831/APP (Householder application for glass room to rear) to allow for a change of material of the rear door from wooden to black aluminium and a change in roof pitch.

  Granted Conditions 4 docs
  Domestic

• Beechcroft 1 Rickyard Grove Grendon Underwood Buckinghamshire HP18 0SF

  PL/25/5952/FA Submitted 27 Nov 2025 344m away

  Single storey rear and 2nd storey side extensions and front porch canopy

  Granted Full applications Extension 21 docs
  Small domestic