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Infill of arrow slit window in north gable; conversion of existing fanlight to louvres; modifications to doors; internal alterations to amalgamate bedrooms 17 & 18 and to relocate function room to north-east corner of basement.

1 Chiltern Street London W1U 7PA

DecidedReference: 26/05485/LBCCity of Westminster

Last published check: 21 Sept 2026, 09:52. Check the council record for more recent changes.

Application location

1 Chiltern Street London W1U 7PA

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Application summary

Status
Decided
Application type
Listed Building Consent Application
Received
12 Aug 2026
Validated
12 Aug 2026
Determination deadline
Not published
Local authority
City of Westminster

Application overview

Infill of arrow slit window in north gable; conversion of existing fanlight to louvres; modifications to doors; internal alterations to amalgamate bedrooms 17 & 18 and to relocate function room to north-east corner of basement.

Proposal details

Reference
26/05485/LBC
Alternative references
PP-15154216
Ward
Marylebone
Agent
Donald Insall Associates

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Documents 27 of 27

DocumentPublishedAction
GRANT OF LISTED BUILDING CONSENT [PE]Decision Notice · PDF17 Sept 2026View
DELEGATED REPORTReport · PDF17 Sept 2026View
EXISTING SECTION - KK (PRE-FIREDrawing · PDF26 Aug 2026View
EXISTING REAR ELEVATION (POST-FIRE)Drawing · PDF26 Aug 2026View
EXISTING REAR ELEVATION (PRE-FIRE)Drawing · PDF26 Aug 2026View
EXISTING SECTION - CC (POST-FIRE)Drawing · PDF26 Aug 2026View
EXISTING SECTION - CC (PRE-FIRE)Drawing · PDF26 Aug 2026View
ACK-GENERAL LETTER (G/P/C)Background Papers · PDF17 Aug 2026View
CNSLT-LA SOCIETYBackground Papers · PDF17 Aug 2026View
SITE NOTICE 21 OR 28 DAYS IF T&C APPL.Background Papers · PDF17 Aug 2026View
NEIGHBOUR NOTIFICATION LETTER (21D)Background Papers · PDF17 Aug 2026View
RECEIPT OF APPLICATIONOther · PDF14 Aug 2026View
LOCATION PLANLocation Plan · PDF12 Aug 2026View
HERITAGE STATEMENTHeritage Statement · PDF12 Aug 2026View
APPLICATIONFORMREDACTEDApplication Form · PDF12 Aug 2026View
COVERING LETTER - LBC FOR MINOR ALTERATIONSBackground Papers · PDF12 Aug 2026View
AHA-CFH-EX-100_REV B_EXISTING GROUND FLOOR PLANDrawing · PDF12 Aug 2026View
AHA-CFH-EX-099_REV A_EXISTING BASEMENT PLANDrawing · PDF12 Aug 2026View
DA-CS-EX-104_EXISTING 1ST FLOORPLANDrawing · PDF12 Aug 2026View
AHA-CS-EX-001_REV A_LOCATION PLANLocation Plan · PDF12 Aug 2026View
AHA-CFH-PL-104_PROPOSED 4TH FLOOR PLANDrawing · PDF12 Aug 2026View
AHA-CFH-GA-100_REV F_PROPOSED GROUND FLOOR PLANDrawing · PDF12 Aug 2026View
AHA-CFH-GA-099_REV B_PROPOSED BASEMENT PLANDrawing · PDF12 Aug 2026View
AHA-CFH-GA-202_REV G_PROPOSED REAR ELEVATIONDrawing · PDF12 Aug 2026View
DESIGN AND ACCESS STATEMENT (3)Design and Access Statement · PDF12 Aug 2026View
AHA-CFH-EX-202A-EXISTING REAR ELEVATION (POST-FIRE)Drawing · PDF12 Aug 2026View
AHA-CFH-EX-202-EXISTING REAR ELEVATION (PRE-FIRE)Drawing · PDF12 Aug 2026View

Documents open on the council website. Browse council documents if a link has changed.

Application timeline

Council milestones and published deadlines. A deadline passing does not confirm a decision.

  1. Application Received Date

    Published milestoneCouncil source

  2. Application Validated Date

    Published milestoneCouncil source

  3. Last Advertised In Press Date

    Published milestoneCouncil source

  4. Latest Advertisement Expiry Date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

  5. Decision Issued Date

    Published milestoneCouncil source

  6. Decision Made Date

    Published milestoneCouncil source

  7. Target Date

    Past published deadline

    A published target or deadline. It does not confirm an outcome.

    Council source

Decision & conditions

Application Permitted
GRANT OF LISTED BUILDING CONSENT [PE]
Planning conditions

Conditions aren’t listed here. Read the council decision notice for the full decision and conditions.

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