15 Avenue Road Winslow Buckinghamshire MK18 3DH Data via plota.co.uk

PL/26/05894/SA - Certificate of Lawful Use - Proposed Refused

Proposal

Certificate of lawfulness for proposed construction of dormer loft conversion Data via plota.co.uk

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View original council record ↗Last checked 26 Sept 2026, 13:30

Street View

Application progress

✓

Received

22 Jul 2026

✗

Refused

14 Sept 2026

Appeal

Not lodged

Refused on 14 Sept 2026 · Delegated Decision · Last checked 15 Sept 2026

Documents 3

Decision & officer reports 2

PDF CASE OFFICER REPORT DELEGATED Case Officer Report · 14 Sept 2026 View ↗ PDF DECISION Decision Notice · 14 Sept 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form and Certificate · 22 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 5

1 listed building within 150 m

Nearest: Norden House, Grade II, 29 m away

The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.

Historic England ↗

Also on the record

Conservation area 44 m away: Winslow; National infrastructure project 419 m away: East West Rail - Bedford to Cambridge and Western improvements, at pre-application; Inside the Winslow built-up area; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.

Not affected

Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Sales history 1

Last sold for £375,000 in February 2026. Terraced house, freehold.

6 February 2026£375,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area82 m² (883 sq ft)

Energy ratingD (57 out of 100), could reach B

PropertyEnd-terrace house, 4 habitable rooms

Built1900 to 1929

HeatingBoiler and radiators, mains gas

WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in August 2018, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council: Buckinghamshire
Application type: Certificate of Lawful Use - Proposed
Postcode: MK18 3DH
Received: 22 Jul 2026
Validated: 22 Jul 2026
Ward: Winslow
Parish: Winslow
Case officer: Show
Target decision: 16 Sept 2026
Decision: Cert of Law PROPOSED-refused
Decision date: 14 Sept 2026
Decision level: Delegated Decision
Applicant: Show
Agent: G2 Architecture

How this decision compares

Decided in 54 days from validation, about the council's usual 56 days. Refused, as 17% of extensions here are.

This one54d

Council56d

UK55d

54%decided within 8 weeks

83%approved

2,231decided in the last year

Plota live figures for extensions decided by Buckinghamshire in the last twelve months, from validation. Buckinghamshire decision record →

Public comments

No public comments yet.

Last counted 15 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Statutory expiry: 16 Sept 2026
Env. assessment: No

Buckinghamshire

Planning Authority Score

1.3/10

Poor

#284 of 296 councils

Relevant to this application:

Householder decisions

Buckinghamshire is one of the slowest councils in England for householder decisions, ranking #280 out of 296. 55% of applications have the time limit extended, above the 41% national average. Householder applications are slightly less likely to be approved here (86%) than the national average (90%).

Among the slowest councils in England

for householder decisions

These figures are council-wide context, not a prediction for this application. View full council performance

Buckinghamshire decision statistics

Based on MHCLG data, the year to March 2026

84%

Overall approval rate

Below avg (87%) #217 of 296

86%

Householder approved

Below avg (90%) #241 of 296

34%

Decided in 8 weeks

Below avg (63%) #280 of 296

55%

Extended time limit

Above avg (41%) #248 of 296

76%

Minor dwellings approved

491 decided (1-9 homes)

82%

Major dwellings approved

71 decided (10+ homes)

82%

Change of use approved

131 decided

4,446

Total decisions

690 refused in the year to March 2026

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.