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Planning application

5 Mountfort Crescent, London, N1 1JW

Granted Islington P2026/1581/LBC Listed Building

Works: Extension Windows or glazing

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

Proposal

Erection of a replacement two-storey side extension, replacement of existing rear conservatory with bay window, replacement of existing roof lantern, removal of existing non-original water tanks and timber enclosure on roof, installation of 1no. air source heat pump with acoustic enclosure in rear garden, along with other associated internal alterations.

As published by the council, reference P2026/1581/LBC

Application record

Reference
P2026/1581/LBC
Type
Listed Building
Status
Granted As published: FINAL DECISION
Decision
Granted As published: Approve with conditions
Received
17 Jun 2026
Validated
17 Jun 2026
Decided
21 Sep 2026
Ward
Barnsbury
Decision by
Delegated
Postcode
N1 1JW

Site history

Applications at this address on the Islington register

This site has had 5 applications since 2023: 2 approved, 0 refused.

  • P2026/1579/FUL Granted

    5 Mountfort Crescent, London, N1 1JW

    Erection of a replacement two-storey side extension, replacement of existing rear conservatory with bay window, replacement of existing roof lantern, removal of existing non-original water tanks and timber enclosure on roof, installation of 1no. air source heat pump with acoustic enclosure in rear garden, along with other associated internal alterations (Listed Building Consent P2026/1581/LBC also submitted)

    Decided 21 Sep 2026 Householder
  • P2024/3431/LBC Withdrawn

    5 Mountfort Crescent, London, N1 1JW

    Erection of a single-storey rear extension to replace existing conservatory, erection of a single-storey side extension to replace existing lean-to, replacement of windows and insertion of new window openings, installation of new roof covering and a roof lantern, excavation of existing basement and installation of a ground source heat pump with associated internal and external alterations including replacement of mechanical, electrical and plumbing services. (A Planning Application ref. P2024/3430/FUL has also been submitted).

    Submitted 18 Nov 2024 Heritage and listed buildings
  • P2024/3430/FUL Withdrawn

    5 Mountfort Crescent, London, N1 1JW

    Erection of a single-storey rear extension to replace existing conservatory, erection of a single-storey side extension to replace existing lean-to, replacement of windows and insertion of new window openings, installation of new roof covering and a roof lantern, excavation of existing basement and installation of a ground source heat pump with associated internal and external alterations including replacement of mechanical, electrical and plumbing services. (An application for Listed building Consent ref. P2024/3431/LBC has also been submitted).

    Submitted 18 Nov 2024 Full applications
  • P2023/3418/LBC Withdrawn

    5 Mountfort Crescent, London, N1 1JW

    Demolition of the existing conservatory and erection of a replacement single-storey rear extension, replacement of side lean-to with a single-storey side extension, excavation and enlargement of the basement including the formation of a side and rear lightwell and installation of a Ground Source Heat Pump, re-roofing and installation of a triple glazed roof lantern and removal of rooftop water tank, replacement of windows and doors, and associated internal and external alterations (Full Planning Application ref. P2023/3381/FUL also submitted).

    Decided 30 Apr 2024 Heritage and listed buildings

Timeline

Dates from the published record

  1. 17 Jun 2026

    Received by Islington

  2. 24 Jul 2026

    Added to PlanIndex

  3. 21 Sep 2026

    Decision issued: Approve with conditions

Cases linked to this one on the register

1 later application on the register refers to this one:

  • P2026/1579/FUL Granted

    5 Mountfort Crescent, London, N1 1JW

    Erection of a replacement two-storey side extension, replacement of existing rear conservatory with bay window, replacement of existing roof lantern, removal of existing non-original water tanks and timber enclosure on roof, installation of 1no. air source heat pump with acoustic enclosure in rear garden, along with other associated internal alterations (Listed Building Consent P2026/1581/LBC also submitted)

    Decided 21 Sep 2026 Householder

Documents

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

52 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

Islington granted permission on 21 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 heritage and listed building applications

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 5 Mountfort Crescent, London, N1 1JW

    P2026/1579/FUL Submitted 17 Jun 2026 50 yards away

    Erection of a replacement two-storey side extension, replacement of existing rear conservatory with bay window, replacement of existing roof lantern, removal of existing non-original water tanks and timber enclosure on roof, installation of 1no. air source heat pump with acoustic enclosure in rear garden, along with other associated internal alterations (Listed Building Consent P2026/1581/LBC also submitted)

    Granted Householder Extension Windows or glazing 52 docs
    Small domestic

  • 6, Mountfort Crescent, London, N1 1JW

    P2025/1501/TRE Submitted 23 May 2025 50 yards away

    99% historically approved · decision due ~30 Jul

    T1: Reduce lateral spread by no more than 1.5 meters on both neighbouring sides of the tree at the properties listed below: 14 Barnsbury Terrace, London N1 1JH 1 Mountfort Crescent, London N1 1JW All work will be carried out to British standards 3998 for tree work. Reason for works: Regular tree maintenance Allowing more light into neighbouring gardens and properties

    Decided Trees 6 docs

  • 5 Mountfort Crescent, London, N1 1JW

    P2023/3418/LBC Submitted 23 Nov 2023 50 yards away

    Demolition of the existing conservatory and erection of a replacement single-storey rear extension, replacement of side lean-to with a single-storey side extension, excavation and enlargement of the basement including the formation of a side and rear lightwell and installation of a Ground Source Heat Pump, re-roofing and installation of a triple glazed roof lantern and removal of rooftop water tank, replacement of windows and doors, and associated internal and external alterations (Full Planning Application ref. P2023/3381/FUL also submitted).

    Withdrawn Heritage and listed buildings Extension Demolition +1 2 docs
    Small domestic

  • 5 Mountfort Crescent, London, N1 1JW

    P2024/3431/LBC Submitted 18 Nov 2024 50 yards away

    93% historically approved · decision due ~29 Jan

    Erection of a single-storey rear extension to replace existing conservatory, erection of a single-storey side extension to replace existing lean-to, replacement of windows and insertion of new window openings, installation of new roof covering and a roof lantern, excavation of existing basement and installation of a ground source heat pump with associated internal and external alterations including replacement of mechanical, electrical and plumbing services. (A Planning Application ref. P2024/3430/FUL has also been submitted).

    Withdrawn Heritage and listed buildings Extension Roofing +1 18 docs
    Small domestic

  • 5 Mountfort Crescent, London, N1 1JW

    P2024/3430/FUL Submitted 18 Nov 2024 50 yards away

    87% historically approved · decision due ~29 Jan

    Erection of a single-storey rear extension to replace existing conservatory, erection of a single-storey side extension to replace existing lean-to, replacement of windows and insertion of new window openings, installation of new roof covering and a roof lantern, excavation of existing basement and installation of a ground source heat pump with associated internal and external alterations including replacement of mechanical, electrical and plumbing services. (An application for Listed building Consent ref. P2024/3431/LBC has also been submitted).

    Withdrawn Full applications Extension Roofing +1 20 docs
    Small domestic

  • 3 MOUNTFORT CRESCENT, LONDON, ISLINGTON, N1 1JW

    P2026/1592/LBC Submitted 17 Jun 2026 50 yards away

    Side Extension Underpinning and Render Repair Works.

    Granted Heritage and listed buildings Extension 8 docs

In Islington

  • P2026/2302/LBC Granted

    32, 34, 36 & 38, Amwell Street, London, EC1R 1XT

    Replacement of internal flat entrance doors, architraves and fanlights, install

    Received 1 Sep, published by the council 7 Sep 2026 Heritage and listed buildings
  • P2026/2220/LBC Granted

    34, SUDELEY STREET, LONDON, ISLINGTON, N1 8HW

    Retrospective Listed Building Consent application for reroofing the front 'butt

    Received 17 Aug, published by the council 24 Aug 2026 Heritage and listed buildings
  • P2026/2272/LBC Granted

    355 St John Street, London, EC1V 4LB

    Replacement of internal flat entrance doors, architraves and fanlights, install

    Received 27 Aug, published by the council 7 Sep 2026 Heritage and listed buildings
  • P2026/2309/LBC Granted

    27 Barnsbury Park, London, N1 1HQ

    Replacement of internal flat entrance doors, architraves and fanlights, install

    Received 2 Sep, published by the council 7 Sep 2026 Heritage and listed buildings
  • P2026/2597/LBC Awaiting decision

    28, Gerrard Road, London, N1 8BA

    The replacement of fittings and reorganisation of first floor bathroom, the adj

    Received 1 Oct, published by the council 5 Oct 2026 Heritage and listed buildings