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Planning application

P/2026/1642

Northumberland House, Lower Square, Isleworth, TW7 6RL

Awaiting decision Hounslow Listed Building Consent to (alter/extend)

Proposal

Listed building consent for the installation of a wireless fire alarm system to both buildings on the site

As published by the council, reference P/2026/1642

Timeline

Dates from the published record

  1. 2 Jun 2026

    Received by Hounslow

  2. 10 Jun 2026

    Validated

    Checked as complete and ready for consideration.

  3. 26 Jul 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

What happens while it is decided

The process from here

This application is with Hounslow for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

About heritage and listed buildings applications

How this application type works

Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.

More on heritage and listed buildings applications in our guide

Nearby applications

Within 500 metres

  • P/2023/0172 Withdrawn

    6 NORTHUMBERLAND HOUSE LOWER SQUARE, ISLEWORTH, TW7 6RL

    Installation of two modern passive vapour vents

    18 Jan 2023 0m away Heritage and listed buildings
  • PAC/2026/1120 Granted

    Saracen House, Swan Street, Isleworth, TW7 6RJ

    Prior approval for the change of use of the first and second floors only of Saracen House from office use (Use Class E) to nine self contained flats (Use Class C3)

    2 Apr 2026 54m away Outline
  • PAC/2026/0251 Awaiting decision

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    26 Jan 2026 80m away Outline
  • PAC/2025/3121 Withdrawn

    Saracen House Swan Street, Isleworth TW7 6RJ

    Prior Approval for the change of use of Saracen House from offices (Use Class E) to a residential (Use Class C3) compromising of 12 flats with associated cycle and refuse storage.

    15 Oct 2025 86m away Outline
  • P/2026/2024 Awaiting decision

    20 Hartland Road, Isleworth, TW7 6RH

    Erection of a rear roof extension with windows to the front of the house.

    8 Jul 2026 115m away Householder
  • P/2026/1321 Granted

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    30 Apr 2026 156m away Lawful development

In Hounslow

  • P/2026/2074 Awaiting decision

    2 Chiswick Lane, Chiswick, London, W4 2JF

    Listed building consent for the change of use from the existing large scale House in Multiple Occupation (Sui Generis) to eight self contained flats (C3) and three, five bedroom Houses in Multiple Occupation (C4) with internal and external alterations and associated communal space, landscaping, cycle and refuse storage.

    15 Jul 2026 Heritage and listed buildings
  • P/2026/1429 Granted

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    Listed building permission for the installation of a acoustic enclosure. Retrospective permission for the installation of three external air conditioning units and 14 internal air conditioning units.

    12 May 2026 Heritage and listed buildings
  • P/2026/1428 Granted

    2 Rupert Road, Chiswick, London, W4 1LU

    Listed building permission for the Installation of three external air conditioning units, 14 internal air conditioning units and acoustic enclosure with associated cable and pipe works. Retrospective permission for the installation of two external air conditioning units and 2 internal air conditioning units.

    12 May 2026 Heritage and listed buildings
  • P/2026/2007 Awaiting decision

    Red Lion House Chiswick Mall, Chiswick, London, W4 2PJ

    Listed Building Consent for the retention and repairs to the existing doors and sash windows with thermal upgrades and the installation of new design staircase to basement to allow increase in head height, removal of non-original internal wall linings, and installation of a high-pressure water mist suppression system, refurbishment of existing fabric structural repairs; and internal layout alterations to the ground and second floors including the erection and replacement of partitions to reinstate the historic plan and layout of the house.

    6 Jul 2026 Heritage and listed buildings
  • P/2026/1899 Awaiting decision

    9 Rupert Road, Chiswick, London, W4 1LU

    Listed Building Consent for the installation of matching designed replacement timber framed windows with slimline double glazing.

    26 Jun 2026 Heritage and listed buildings