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Planning application

99 Heath Street London NW3 6SS

Granted Camden 2026/3389/P Certificate of Lawfulness (Proposed)

Works: Extension Domestic

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

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

Proposal

Confirmation of the implementation of planning permission 2007/3874/P granted, subject to a legal agreement dated 06/12/2007 for 'Change of use from offices (A2) to single family dwellinghouse (C3), the erection of extension at rear ground floor level within courtyard and formation of a terrace over, extension at ground floor level to western end of courtyard, creation of off-street open car parking space and minor elevational changes to The Mount elevation.', by way of erection of the extension at ground floor level to the western end of the courtyard, creation of an off-street car parking space, and minor elevational changes to the Mount elevation.

As published by the council, reference 2026/3389/P

Application record

Reference
2026/3389/P
Type
Certificate of Lawfulness (Proposed)
Status
Final Decision
Decision
Granted
Received
7 Aug 2026
Validated
12 Aug 2026
Decided
30 Sep 2026
Ward
Hampstead Town
Decision by
Delegated
Postcode
NW3 6SS

Site history

Applications at this address on the Camden register

This site has had 5 applications since 2010: 3 approved, 1 refused.

  • 2010/6285/P Refused

    99 Heath Street London NW3 6SS

    Retention of roller shutter to west (The Mount) elevation of existing building (Class A2).

    Decided 20 Jan 2011 Full applications
  • 2010/3881/P Granted

    99 Heath Street London NW3 6SS

    Installation of aluminium louvred opening at roof level and timber louvred door to west side elevation of the existing building (Class A2).

    Decided 4 Oct 2010 Full applications
  • 2010/3554/P Granted

    99 Heath Street London NW3 6SS

    Retrospective application for installation of windows on rear ground floor level extension within courtyard (north elevation) and associated alterations to existing building (Class A2); along with reinstatement of timber garage doors to street elevation as previously approved under planning permission reference 2007/3874/P.

    Decided 23 Aug 2010 Full applications
  • 2010/2055/P Withdrawn

    99 Heath Street London NW3 6SS

    Retrospective application for installation of windows on rear ground floor level extension within courtyard (north elevation), installation of roller shutter and entrance gate on The Mount frontage (west elevation) and associated alterations to existing building (Class A2)

    Decided 23 Jun 2010 Full applications

Timeline

Dates from the published record

  1. 7 Aug 2026

    Received by Camden

  2. 12 Aug 2026

    Validated

    Checked as complete and ready for consideration.

  3. 15 Aug 2026

    Added to PlanIndex

  4. 30 Sep 2026

    Decision issued: Granted

Documents

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

14 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Camden granted permission on 30 September 2026, 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 lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 99 Heath Street London NW3 6SS

    2010/6285/P 50 yards away

    Retention of roller shutter to west (The Mount) elevation of existing building (Class A2).

    Refused Full applications

  • 99 Heath Street London NW3 6SS

    2010/2055/P 50 yards away

    Retrospective application for installation of windows on rear ground floor level extension within courtyard (north elevation), installation of roller shutter and entrance gate on The Mount frontage (west elevation) and associated alterations to existing building (Class A2)

    Withdrawn Full applications Extension Windows or glazing

  • 99 Heath Street London NW3 6SS

    2010/3881/P 50 yards away

    Installation of aluminium louvred opening at roof level and timber louvred door to west side elevation of the existing building (Class A2).

    Granted Full applications

  • 99 Heath Street London NW3 6SS

    2010/3554/P 50 yards away

    Retrospective application for installation of windows on rear ground floor level extension within courtyard (north elevation) and associated alterations to existing building (Class A2); along with reinstatement of timber garage doors to street elevation as previously approved under planning permission reference 2007/3874/P.

    Granted Full applications Extension Windows or glazing

  • 101-103 Heath Street London NW3 6SS

    2013/7472/P 50 yards away

    Change of use from shop (Class A1) to office use (Class B1) at basement, ground and part first floor levels for a temporary period of two years.

    Decided Full applications

  • 101-103 Heath Street LONDON NW3 6SS

    2011/4878/P 50 yards away

    Change of use of part first floor level from gallery (Class A1) to residential (Class C3); erection of a two storey rear extension at ground and first floor levels following the demolition of existing single storey rear extension and store rooms in rear yard; associated alterations including alterations to the shopfront, replacement of existing rear second floor window with sliding doors and refurbishment works.

    Granted Full applications Extension Demolition +1
    Small domestic

In Camden

  • 2026/4314/P Awaiting decision

    Basement Flat & Flat Raised Ground Floor 46 Primrose Hill Road London NW3 3AA

    Amalgamation of two self-contained flats to form a self-contained maisonette on lower ground and raised ground floor.

    Received 6 Oct, published by the council 9 Oct 2026 Lawful development
  • 2026/4304/P Awaiting decision

    68 Clarence Way London NW1 8DG

    Erection of single storey outbuilding in rear garden.

    Received 2 Oct, published by the council 9 Oct 2026 Lawful development
  • 2026/3821/P Granted

    Plots B, C and D at Highgate Studios Highgate Road London NW5 1TL

    Certificate of Lawful Development to confirm the lawful use of the site is for office use (Class E(g)(i)) and that the use of the site as a gym (Class E(d)) or any other use falling within Class E would be lawful.

    Received 4 Sep, published by the council 11 Sep 2026 Lawful development
  • 2026/2493/P Granted

    8 Fitzroy Road London Camden NW1 8TX

    Use of the entire building for a single-family home (C3 residential).

    Received 16 Jun, published by the council 24 Jul 2026 Lawful development
  • 2026/3676/P Awaiting decision

    14 Greenaway Gardens London NW3 7DH

    Erection of a single storey gymnasium outbuilding within the rear garden.

    Received 25 Sep, published by the council 28 Sep 2026 Lawful development