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Planning application

Berkshire House 39 - 51 High Street Ascot SL5 7HY

Granted Windsor and Maidenhead 25/02457/CLAMA Prior Approval Class MA

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

Proposal

Prior approval for the change of use of the first and second floors from office (Class E) to residential (C3) for 32 no. units.

As published by the council, reference 25/02457/CLAMA

Application record

Reference
25/02457/CLAMA
Type
Prior Approval Class MA
Status
Decided
Decision
Prior Approval Required and Granted
Received
19 Sep 2025
Validated
19 Sep 2025
Decided
13 Nov 2025
Ward
Ascot & Sunninghill
Parish
Sunninghill And Ascot Parish
Decision by
Delegated
Postcode
SL5 7HY

Site history

Applications at this address on the Windsor and Maidenhead register

This site has had 3 applications since 2021: 1 approved, 2 refused.

  • 24/02294/CLAMA Refused

    Berkshire House 39 - 51 High Street Ascot SL5 7HY

    Prior approval for the change of use of the first and second floor from office building (Class E) to residential (Class C3) for 32no. dwellings.

    Decided 28 Nov 2024 Prior approval
  • 21/02260/CLASSO Refused

    Berkshire House 39 - 51 High Street Ascot SL5 7HY

    Change of use from offices (Class B1(a)) to dwellinghouses (Class C3) to create x30 flats.

    Decided 21 Sep 2021 Prior approval

Timeline

Dates from the published record

  1. 19 Sep 2025

    Received by Windsor and Maidenhead

  2. 13 Nov 2025

    Decision issued: Prior Approval Required and Granted

  3. 11 Aug 2026

    Added to PlanIndex

Documents

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

28 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 this grant of permission means

Windsor and Maidenhead granted permission on 13 November 2025, 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 prior approval applications

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • Berkshire House 39 - 51 High Street Ascot SL5 7HY

    24/02294/CLAMA Submitted 20 Sep 2024 0m away

    Prior approval for the change of use of the first and second floor from office building (Class E) to residential (Class C3) for 32no. dwellings.

    Refused Prior approval 28 docs
    Major scheme

  • Berkshire House 39 - 51 High Street Ascot SL5 7HY

    21/02260/CLASSO Submitted 20 Jul 2021 4m away

    Change of use from offices (Class B1(a)) to dwellinghouses (Class C3) to create x30 flats.

    Refused Prior approval New dwelling 47 docs

  • Second Floor Berkshire House 39 - 51 High Street Ascot SL5 7HY

    23/02464/HABREG Submitted 5 Oct 2023 21m away

    Approval under regulation 77 of the Conservation (Natural Habitats etc.) Regulations 2017 for application 23/01715/CLAMA for Prior approval to change the use of the second floor from Class E offices to Class C3 dwellinghouses (14 units).

    Refused 8 docs
    Major scheme

  • 37 Course Road Ascot SL5 7HH

    21/02842/FULL Submitted 21 Sep 2021 55m away

    Single storey rear extension, x1 new rooflight, reconstruction of chimney stack and alteration to fenestration following demolition of existing element.

    Granted Full applications Extension Loft or dormer +2 11 docs
    Small domestic

  • 37 Course Road Ascot SL5 7HH

    21/00841/FULL Submitted 19 Mar 2021 55m away

    Single storey rear extension, raising of ridge to accommodate loft conversion, x1 new dormer to the rear, x3 new rooflights, alteration to fenestration, front entrance door and existing chimney, following demolition of existing rear extension.

    Refused Full applications Extension Loft or dormer +2 26 docs
    Small domestic

  • 33 Course Road Ascot SL5 7HH

    21/03241/FULL Submitted 1 Nov 2021 58m away

    Single storey side/rear extension and x2 new rooflights to front elevation following demolition of existing element.

    Granted Full applications Extension Loft or dormer +1 14 docs
    Small domestic

In Windsor and Maidenhead

  • 26/01912/PDXL Granted

    Fourwinds 2 Green Lane Ascot SL5 7QJ

    Single storey rear extension no greater than 7.46m in depth, 3.20m high with an eaves height of 2.45m.

    3 Aug 2026 Prior approval
  • 26/01831/PDXL Granted

    1 Bell View Windsor SL4 4ET

    Single storey rear extension no greater than 4.30m in depth, 2.80m high with an eaves height of 2.50m.

    27 Jul 2026 Prior approval
  • 26/01894/PDXL Granted

    1 Grange Lane Cookham Maidenhead SL6 9RP

    1No. single storey rear extension and 1No. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    3 Aug 2026 Prior approval
  • 26/01822/PDXL Granted

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Single storey side/rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.80m.

    24 Jul 2026 Prior approval
  • 26/01846/PDXL Granted

    24 New Road Datchet Slough SL3 9JB

    Single storey rear extension no greater than 4.00m in depth, 3.20m high with an eaves height of 3.00m.

    27 Jul 2026 Prior approval