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Planning application

PA26/0551

First Floor and Second Floor Flat, 12 Onslow Road, Richmond TW10 6QF

Awaiting decision Richmond upon Thames Full Application

Proposal

Internal amalgamation of the existing first and second-floor flats to form a single three-bedroom maisonette, including conservation-led window replacement.

As published by the council, reference PA26/0551

Timeline

Dates from the published record

  1. 18 Feb 2026

    Received by Richmond upon Thames

  2. 2 Mar 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 Richmond upon Thames 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 full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

Nearby applications

Within 500 metres

  • 06/0631/PS192 Granted

    14 Onslow Road Richmond Richmond Upon Thames TW10 6QF

    Demolition of existing extension, then the erection of a single storey rear extension.

    7 Mar 2006 8m away Prior approval
  • 06/0902/CAC Refused

    91 Mount Ararat Road Richmond Richmond Upon Thames TW10 6PL

    Demolition of existing building and erection of a building containing eight flats (4 x 1 bedroom , 3 x 2 bedroom, 1 x 3 bedroom) with garden amenity and undercroft parking.

    28 Mar 2006 61m away Heritage and listed buildings
  • 06/0901/FUL Refused

    91 Mount Ararat Road Richmond Richmond Upon Thames TW10 6PL

    Demolition of existing building and erection of a building containing eight flats (4 x 1 bedroom , 3 x 2bedroom, 1 x 3 bedroom) with garden amenity and undercroft parking.

    27 Mar 2006 61m away Full applications
  • PA26/2507 Awaiting decision

    79 Mount Ararat Road, Richmond, Surrey

    EXTENSIONS TO REAR AND SIDE AT LOWER GROUND FLOOR AND REAR-SIDE AT GROUND FLOOR LEVELS; REPLACEMENT OF EXISTING SINGLE-GLAZED WINDOWS AND DOORS TO BE REPLACED WITH HARDWOOD TIMBER, SLIM-LITE DOUBLE-GLAZED WINDOWS WITH INTEGRAL GLAZING BARS AND DRAUGHTPROOFING, DETAILS TO MATCH EXISTING IN ALL RESPECTS; CLADDING OF THE FRONT EXTERNAL STEPS WITH LIMESTONE PAVING TO MATCH NO.78 AND INTERNAL REFURBISHMENT AND RECONFIGURATION

    20 Jul 2026 74m away Householder
  • PA26/2311 Awaiting decision

    Rear Of 19-23 Friars Stile Road Richmond

    Details pursuant to Condition 14 - materials, of planning permission 25/0079/VRC.

    1 Jul 2026 74m away Conditions
  • PA26/2425 Awaiting decision

    37, Montague Road, Richmond, TW10 6QJ

    Lime (T1) – Fell to ground level and grind stump. Reasons: The tree is too large for the site and is causing heavy shade. Cherry (T2) – Crown reduce by 1m all around. Reasons: The tree is too large for the site and is causing heavy shade. Holly (T3) – Fell to ground level and grind stump. Reasons: The tree is too large for the site and is causing heavy shade.

    10 Jul 2026 80m away Trees

In Richmond upon Thames

  • PA26/1801 Granted

    6, High Park Road, Kew

    Replacement of all existing front windows of flats 1 and 2, with new timber, slim-line double-glazed, sliding-sash windows coloured white, and replacement of all existing side and rear windows with white UPVC double glazed windows. Replacement rear doors with new white, UPVC, triple-glazed units.

    22 May 2026 Full applications
  • PA26/1140 Refused

    outside 16-18 London Road, Twickenham

    The proposed deployment of a BT Street Hub 3 unit

    30 Mar 2026 Full applications
  • PA26/2105 Granted

    Ham Gate Richmond Park Richmond

    Repair existing cast iron fence and gates on a like for like basis following impact damage.

    15 Jun 2026 Full applications
  • PA26/2594 Awaiting decision

    First And Second Floors, 206 - 208 Upper Richmond Road West, London, SW14 8AH

    Change of use of the first and second floors from office space (Class E) into HMO (Sui Generis), external alterations of rear elevation to replace existing window and extension of existing rear access stairs.

    24 Jul 2026 Full applications
  • PA26/1658 Refused

    Flat 2 and Flat 4 , 13 Marlborough Road, Richmond, TW10 6JT

    Single storey rear extension and installation of juliet balcony door at first floor level.

    12 May 2026 Full applications