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Planning application

17 TWINFLOWER, WALNUT TREE, MILTON KEYNES, MK7 7LH

Refused Milton Keynes PLN/2026/0068 Lawful development certificate (proposed)

Works: Extension Small domestic

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

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

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

As published by the council, reference PLN/2026/0068

Application record

Reference
PLN/2026/0068
Type
Lawful development certificate (proposed)
Status
Decision Made
Decision
Refused
Received
15 Jan 2026
Validated
15 Jan 2026
Decided
9 Mar 2026
Ward
Monkston
Parish
Walton
Decision by
Delegated Decision
Postcode
MK7 7LH

Timeline

Dates from the published record

  1. 15 Jan 2026

    Received by Milton Keynes

  2. 9 Mar 2026

    Decision issued: Refused

  3. 10 Aug 2026

    Added to PlanIndex

Documents

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

7 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.

Trade members open them from here.

Open the documents

What refusal means

The process from here

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.

About lawful development applications

How this application type works

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

Nearby applications

Within 500 metres

  • 8 Twinflower Walnut Tree Milton Keynes MK7 7LH

    19/02725/NMA Submitted 16 Oct 2019 82m away

    Non material amendment to 18/01636/FUL window to new en-suite, conversion of a window to a door on the ground floor.

    Granted Amendments Windows or glazing 6 docs

  • Verge by The Venue MK, Hindhead Knoll, Walnut Tree, MK7 7FH, Milton Keynes, MK7 7FH

    PLN/2025/2097 Submitted 3 Oct 2025 153m away

    Construction of micro energy storage facility with fence and associated work

    Granted Full applications 9 docs
    Small domestic

  • 78 DUNCHURCH DALE, WALNUT TREE, MILTON KEYNES, MK7 7BU

    PLN/2026/1353 Submitted 25 Jun 2026 155m away

    Demolition of existing conservatory and construction of single storey rear extension, conversion of existing garage store to habitable space

    Granted Householder Extension Demolition 7 docs
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  • 7 Hindhead Knoll Walnut Tree Milton Keynes MK7 7NR

    20/01126/NMA Submitted 1 May 2020 155m away

    Non material amendments to planning permission 19/01901/FUL to change approved west elevation rear single storey wall from glass to brick and the glass roof to the same single storey rear extension to be changed to tile and 3no Velux windows

    Granted Amendments Extension Loft or dormer +1 6 docs
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  • 34 Pettingrew Close Walnut Tree Milton Keynes MK7 7LL

    19/02450/CLUP Submitted 17 Sep 2019 168m away

    Proposed loft conversion with a rear dormer

    Granted Lawful development Loft or dormer 5 docs

  • 79 KHASIABERRY, WALNUT TREE, MILTON KEYNES, MK7 7DS

    PLN/2025/1929 Submitted 12 Sep 2025 217m away

    Single storey rear extension including the installation of a non-standard ground floor rear window (Retrospective) and replacement of Juliette balcony with window

    Granted Householder Extension Windows or glazing 6 docs
    Small domestic

In Milton Keynes

  • PLN/2026/1586 Withdrawn

    4 BROMHAM MILL, GIFFARD PARK, MILTON KEYNES, MK14 5QP

    Certificate of lawfulness for the proposed garage conversion and side extension

    29 Jul 2026 Lawful development
  • PLN/2026/1370 Refused

    15 CASTLE ROSE, WOUGHTON PARK, MILTON KEYNES, MK6 3BQ

    Certificate of lawfulness for the proposed construction of a low brick wall with railings (1.5 m overall), brick piers, sliding gate set 5 m from road, and pedestrian gate within domestic curtilage

    29 Jun 2026 Lawful development
  • PLN/2026/1393 Refused

    2 GREATCHESTERS, BANCROFT, MILTON KEYNES, MK13 0PA

    Certificate of lawfulness for the proposed demolition of existing conservatory, erection of a new rear extension, infill the space under the carport and loft conversion with a rear dormer

    2 Jul 2026 Lawful development
  • PLN/2026/1741 Awaiting decision

    5 Spring Mews, Sherington, MK16 9FT

    Certificate of lawfulness for the existing detached rear outbuilding for use as a garden studio

    18 Aug 2026 Lawful development
  • PLN/2026/1170 Granted

    61 WINDSOR STREET, BLETCHLEY, MILTON KEYNES, MK2 2LN

    Certificate of lawfulness for proposed loft conversion with rear and side dormer extension and rooflights to front roof slope

    2 Jun 2026 Lawful development