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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)

5 Mountfort Crescent, London, N1 1JW

FINAL DECISIONReference: P2026/1579/FULLondon Borough of Islington

Last published check: 30 Sept 2026, 13:02. Check the council record for more recent changes.

Application location

5 Mountfort Crescent, London, N1 1JW

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Application summary

Status
FINAL DECISION
Application type
Full Planning (Householder)
Received
17 Jun 2026
Validated
17 Jun 2026
Determination deadline
11 Aug 2026
Local authority
London Borough of Islington

Application overview

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)

Proposal details

Reference
P2026/1579/FUL
Alternative references
PP-15014938
Ward
Barnsbury
Agent
Daniel Watney Partnership
UPRN
5300065115

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Documents 52 of 52

DocumentPublishedAction
Application Form - Without Personal DataApplication Form - Redacted17 Jun 2026View
Site Location PlanLocation Plan17 Jun 2026View
Proposed Block PlanDrawings - Proposed - Site Layout17 Jun 2026View
Existing Block PlanDrawings - Existing - Site Layout17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 1)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 2)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 3)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 4)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 5)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 6)Application Drawings - Superseded17 Jun 2026View
*superseded* Deisgn and Access Statement (Part 7)Application Drawings - Superseded17 Jun 2026View
*superseded* Design and Access Statement (Part 8)Application Drawings - Superseded17 Jun 2026View
*superseded* Design and Access Statement (Part 9)Application Drawings - Superseded17 Jun 2026View
Existing Site PlanDrawings - Existing - Site Layout17 Jun 2026View
Proposed Site PlanDrawings - Proposed - Site Layout17 Jun 2026View
Proposed Boundary ConditionsDrawings - Proposed17 Jun 2026View
Existing and Demolition SectionDrawings - Existing Sections17 Jun 2026View
Proposed Section 1Drawings - Proposed - Sections17 Jun 2026View
Proposed Section 2Drawings - Proposed - Sections17 Jun 2026View
Proposed Floor DetailsDrawings - Proposed17 Jun 2026View
Proposed Floor DetailsDrawings - Proposed17 Jun 2026View
Proposed Facade Detail SectionDrawings - Proposed17 Jun 2026View
Proposed Boundary Treatment DetailsDrawings - Proposed17 Jun 2026View
*superseded* Proposed Window DetailsApplication Drawings - Superseded17 Jun 2026View
*superseded* Proposed External Glazing ScheduleApplication Drawings - Superseded17 Jun 2026View
Structural StatementApplication Supporting Documents17 Jun 2026View
*superseded* Daylight or Sunlight Assessment (original)Sunlight/Daylight Assessment17 Jun 2026View
Planning StatementApplication Supporting Documents17 Jun 2026View
Plant Noise Impact AssessmentApplication Supporting Documents17 Jun 2026View
Sustainable Design and Construction StatementApplication Supporting Documents17 Jun 2026View
*superseded* Daylight or Sunlight Assessment (ver.2.1)Sunlight/Daylight Assessment10 Aug 2026View
Existing and Demolition Basement Plan (revised)Drawings - Existing - Plans15 Sept 2026View
Existing and Demolition Ground Floor Plan (revised)Drawings - Existing - Plans15 Sept 2026View
Existing and Demolition First Floor Plan (revised)Drawings - Existing - Plans15 Sept 2026View
Existing and Demolition Second Floor Plan (revised)Drawings - Existing - Plans15 Sept 2026View
Existing and Demolition Roof Plan (revised)Drawings - Existing - Plans15 Sept 2026View
Proposed Basement Plan (revised)Drawings - Proposed - Plans15 Sept 2026View
Proposed Ground Floor Plan (revised)Drawings - Proposed - Plans15 Sept 2026View
Proposed First Floor Plan (revised)Drawings - Proposed - Plans15 Sept 2026View
Proposed Second Floor Plan (revised)Drawings - Proposed - Plans15 Sept 2026View
Proposed Roof Plan (revised)Drawings - Proposed - Plans15 Sept 2026View
Existing and Demolition Front Elevation (revised)Drawings - Existing - Elevations15 Sept 2026View
Existing and Demolition Rear Elevation (revised)Drawings - Existing - Elevations15 Sept 2026View
Existing and Demolition Side Elevation (North) (revised)Drawings - Existing - Elevations15 Sept 2026View
Proposed Front Elevation (revised)Drawings - Proposed - Elevations15 Sept 2026View
Proposed Rear Elevation (revised)Drawings - Proposed - Elevations15 Sept 2026View
Proposed Side Elevation (North) (revised)Drawings - Proposed - Elevations15 Sept 2026View
Proposed Front (with Gates) Elevation (reivsed)Drawings - Proposed - Elevations15 Sept 2026View
Design and Access Statement (rev.02)Design and Access Statement15 Sept 2026View
Daylight or Sunlight Assessment (ver.2.2 with Appendix)Sunlight/Daylight Assessment21 Sept 2026View
Delegated Officer's ReportDelegated Report21 Sept 2026View
Decision NoticeDecision Notice21 Sept 2026View

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Application timeline

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  1. Application date

    Published milestoneCouncil source

  2. Received date

    Published milestoneCouncil source

  3. Registration date

    Published milestoneCouncil source

  4. Valid date

    Published milestoneCouncil source

  5. Press notice start date

    Published milestoneCouncil source

  6. Site notice date

    Published milestoneCouncil source

  7. Consultation expiry date

    Past published deadline

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    Council source

  8. Publicity end date

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    Council source

  9. Site notice end date

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  10. Statutory expiry date

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  11. Decision due date

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  12. Dispatch date

    Published milestoneCouncil source

  13. Decision date

    Published milestoneCouncil source

  14. Extension date

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    Council source

Decision & conditions

Approve with conditions
Decision Notice
Planning conditions
  1. 3 YEAR CONSENT PERIOD: The development hereby permitted shall be begun not later than the expiration of three years from the date of this permission. REASON: To comply with the provisions of Section 91(1)(a) of the Town and Country Planning Act 1990 as amended by the Planning and Compulsory Purchase Act 2004 (Chapter 5).
  2. DRAWING AND DOCUMENT NUMBERS: The development hereby approved shall be carried out in accordance with the following approved plans: Location Plan (099-SS-DR-A-10000, PL1), 099-SS-DR-A-10001 (PL1), 099-SS-DR-A-10500 (PL1), 099-SS-DR-A-10501 (PL1), 099-SS-DR-A-11500 (PL2), 099-SS-DR-A-11501 (PL2), 099-SS-DR-A-11503 (PL2), 099-SS-DR-A-11504 (PL2), 099-SS-DR-A-12500 (PL2), 099-SS-DR-A-12501 (PL2), 099-SS-DR-A-12502 (PL2), 099-SS-DR-A-12503 (PL2), 099-SS-DR-A-13500 (PL1), 099-SS-DR-A-13501 (PL1), 099-SS-DR-A-40002 (PL1), 099-SS-DR-A-40003 (PL1), 099-SS-DR-A-40100 (PL1), 099-SS-DR-A-40101 (PL1), Design and Access Statement (version 02, dated 09/09/2026), Plant Noise Impact Assessment (version 2, dated 10/02/2026), Daylight and Sunlight Report (v2.2, dated 28/07/2026), Sustainable Design and Construction Statement, Planning Statement (dated 15/06/2026), Structural Statement (dated 16/02/2026) REASON: To comply with Section 70(1)(a) of the Town and Country Act 1990 as amended and the Reason for Grant and also for the avoidance of doubt and in the interest of proper planning.
  3. MATERIALS (DETAILS): Details and samples of all facing materials shall be submitted to and approved in writing by the Local Planning authority prior to any superstructure work commencing on site. The details and samples shall include: (a) Timber fins and timber infill panels to extension; (b) Window treatment to extension (including sections and reveals); (c) Roofing material to extension; (d) Roof lantern; (e) Replacement side gate; (f) New door to extisting opening Level 01; (g) Bay window material and colour; (h) any other facing materials to be used. The development shall be carried out strictly in accordance with the details approved and shall be maintained as such thereafer. REASON: In order to safeguard the special architectural or historic interest of the heritage asset.
  4. ACOUSTIC ENCLOSURE (COMPLIANCE): Notwithstanding the indicative details contained within the approved Design and Access Statement, the air source heat pump and any associated acoustic enclosure shall not be installed or brought into use unless details of their size, design, appearance and material have first been submitted to and approved in writing by the Local Planning Authority. The equipment shall be installed in accordance with the approved details and retained as such thereafter in perpetuity. REASON: In order to safeguard the amenities and special architectural or historic interest of the heritage asset.
  5. NOISE LIMIT (COMPLIANCE): The design and installation of new items of fixed plant shall be such that when operating the cumulative noise level LAeq Tr arising from the proposed plant, measured or predicted at 1m from the facade of the nearest noise sensitive premises, shall be a rating level of at least 5dB(A) below the background noise level LAF90 Tbg. The measurement and/or prediction of the noise should be carried out in accordance with the methodology contained within BS 4142:2014+A1:2019. REASON: To protect neighbouring amenity.
  6. AIR SOURCE HEAT PUMP MAINTENANCE: The applicant is advised that Islington have a duty to investigate any complaints in terms of statutory nuisance. It is also advised that the plant is checked upon installation and regularly checked, maintained and serviced to ensure noise levels do not rise or acoustic character such as tonality, intermittency, impulsivity or other acoustic character develop.
  7. FLAT ROOF NOT USED AS AMENITY SPACE (COMPLIANCE): The flat roof areas of the extensions hereby approved shall not be used as an amenity or sitting out space of any kind whatsoever and shall not be used other than for essential maintenance, repair or escape in case of emergency. REASON: To prevent the undue overlooking of neighbouring habitable room windows in accordance with Policy PLAN1 of Islington's Strategic and Development Management Policies (2023).
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