ArchitectPublic profile
Extension Architecture
Planning history
70 public planning applications
Planning approval rate
87% approved
Review volumeLow · 0
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Planning history70 public planning applicationsSee detail →Planning approval rate87% approvedSee detail →
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Extension Architecture’s real planning history from UK council applications — where they’ve worked and how often schemes were approved. · Active 2017–2025
approval rate83%
planning applications70
approved schemes53
councils worked in11
What they work on
The kinds of project Extension Architecture has filed planning applications for.
- Loft conversion20
- Rear extension32
- Side extension13
- Extension47
- Basement3
- Change of use3
- Outbuilding / garden room3
- Conservatory / orangery4
- Porch1
- Listed building / conservation1
- Demolition11
- Roof / fenestration17
Where they’ve worked
Each pin is a planning application, coloured by its recorded decision.
Council experience
- Sutton — 27 applicationsSee planning experience in Sutton
- Lambeth — 14 applicationsSee planning experience in Lambeth
- Southwark — 13 applicationsSee planning experience in Southwark
- Brent — 5 applicationsSee planning experience in Brent
- Newham — 5 applicationsSee planning experience in Newham
- Ealing — 1 applicationSee planning experience in Ealing
- Kingston — 1 applicationSee planning experience in Kingston
- Croydon — 1 applicationSee planning experience in Croydon
- Tower Hamlets — 1 applicationSee planning experience in Tower Hamlets
- Bromley — 1 applicationSee planning experience in Bromley
- Lewisham — 1 applicationSee planning experience in Lewisham
Recent planning applications
- No decision3 Carshalton Grove Sutton SM1 4LYErection of a single storey side extension.
- Approved254 - 268 Camberwell Road London Southwark SE5 0DPNon-material amendment to planning permission reference: 20/AP/3489 dated 05/10/2022. NMA sought: Internal layout changes to comply with current building regulations.
- Approved254 - 268 Camberwell Road London Southwark SE5 0DPVariation of Condition 1 (Approved Plans) of planning permission ref. 22/AP/3987 dated 15/02/2023 for: Reduced basement; and external link along north facade reduced from two storeys to one.' The amendment seeks: internal changes to ensure that the scheme complies with current Building Control requirements.
- Approved123 Hambro Road London SW16 6JDApplication for a Certificate of Lawful Development (Proposed) with respect to the change of use of the property (Use Class C3) to HMO (Use Class C4) for a maximum of 6 people, together with the installation of a side window at first floor level.
- Approved43 Donnybrook Road London Lambeth SW16 5AYApplication for Certificate of Lawfulness (Proposed) with respect to the conversion of single dwelling (Use Class C3) to 6-bed HMO (Use Class C4).
- Approved64 Tulse Hill London SW2 2PTApplication for a Certificate of Lawful Development (Proposed) with respect to erection of a single storey ground floor rear extension. Erection of a hip to gable roof extension incorporating a rear dormer roof extension with juliet balconies and installation of 2 rooflights to the front roof slope.
- Approved15 Spenser Road London SE24 0NSErection of a single storey ground floor infill extension with a courtyard, including alteration the external staircase. (Flat 1)
- No decision4 Marble House 20 Grosvenor Terrace London Southwark SE5 0DDChange of use of ground floor of existing Live-Work Unit (sui generis) to Residential (Class C3) to create a two bedroom flat, removal of roller shutter on external windows facing Grosvenor Terrace.
- Approved43 Donnybrook Road London Lambeth SW16 5AYApplication for a Certificate of Lawful Development (Proposed) with respect to the replacement of the rear extension with a single storey ground floor rear infill extension.
- Approved1 Cranswick Road London Southwark SE16 3BJConstruction of a two storey side extension, alterations to existing side boundary treatment including new side access gate, installation of new doors to rear elevation, EV charging point to front elevation and PV panels on front and rear roof slopes.
- Approved43 Lavender Road London Southwark SE16 5DZProposed double storey side extension, single storey rear extension and garage alteration.
- Approved43 Lavender Road London Southwark SE16 5DZLawful Development Certificate for (Proposed) Erection of a rear dormer loft conversion over existing roof and 2 front roof lights to dwellinghouse
- Refused6 Mallard Way, London, NW9 8JHDemolition of conservatory and outbuilding and erection of a single and two storey side extension with conversion of garage into habitable space to dwellinghouse
- Approved328 Coldharbour Lane London Lambeth SW9 8QHVariation of Condition 2 (Approved Plans) of planning permission ref: 23/03735/FUL (Erection of single storey rear extension (to first floor flat)) granted on 05/02/2024.
- Withdrawn221 Rye Lane London Southwark SE15 4TPErection of a 5 storey building comprising of ground floor Class E unit and 3 x residential units on the upper floors (1 x 3 bed and 2 x 1 bed) following demolition of existing single storey Class E unit.
- Approved16 Lynette Avenue London SW4 9HDApplication for a Certificate of Lawful Development (Proposed) with respect to conversion of existing loft involving the installation of 8 x rooflights to the front and rear roofs with installation of 6 x photovoltaic panels to the rear roof.
- Approved211 Bridgewood Road Worcester Park KT4 8XUConversion of garage into habitable room with alterations to front fenestration.
- Approved6 Mallard Way, London, NW9 8JHCertificate of lawfulness for proposed demolition of existing outbuildling, proposed erection of hip to gable extension, rear dormer window with Juliet balcony and single storey outbuilding in rear garden of the dwellinghouse (Revised Description)
- Approved6 Mallard Way, London, NW9 8JHPrior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3m Eaves height - 3m
- Approved328 Coldharbour Lane London SW9 8QHErection of single storey rear extension (to first floor flat).
- Approved19 Banstead Road South Sutton SM2 5LFErection of a part one, part two storey side and rear extension, alterations to flank and rear fenestrations and provision of a raised rear patio.
- Approved1 Hansler Road London Southwark SE22 9DJDetails of Condition 3 (Refuse Storage) pursuant to planning permission 22/AP/3022 dated 03/02/2023 for 'Variation of condition 1 (approved plans) pursuant to planning permission 20/AP/1658 (Construction of mansard roof extension and conversion of existing building (ground floor office) into two flats, 1 x 2 bedroom at ground floor and 1 x 2 bedroom duplex at at first and second floor levels incorporating external terrace at second floor) to alter and extend the rear mansard and reduce the size of the roof terrace'.
- Approved1 Hansler Road London Southwark SE22 9DJDetails of Condition 4 (Cycle Storage Details) pursuant to planning permission 22/AP/3022 dated 03/02/2023 for 'Variation of condition 1 (approved plans) pursuant to planning permission 20/AP/1658 (Construction of mansard roof extension and conversion of existing building (ground floor office) into two flats, 1 x 2 bedroom at ground floor and 1 x 2 bedroom duplex at at first and second floor levels incorporating external terrace at second floor) to alter and extend the rear mansard and reduce the size of the roof terrace'.
- Approved46 Gomm Road London Southwark SE16 2TXConstruction of a single storey side and rear extension and rear dormer extension.
- Withdrawn31 Abbotts Road Cheam SM3 9SJFormation of a vehicle crossover.
- Approved135 Demesne Road Wallington SM6 8EWDemolition of existing conservatory and erection of a part one, part two storey rear extension, enlargement of rear dormer, alterations to the front porch by means of increased height. Erection of a single storey wrap around extension to existing standalone garage to form storage and office space. New off-street parking and boundary changes.
- Approved77 Mayfield Gardens Hanwell W7 3RBAlterations to ground floor rear fenestration involving installation of two doors and one window (following removal of existing windows and door)
- Refused1A Spenser Road London SE24 0NSErection of a two storey rear infill extension with two side rooflights and the erection of a side dormer window extension over the main roof and the installation of two side rooflights over the outrigger plus the removal of a ground rear window for a timber bi-folding door unit and a replacement roof over the existing single storey side extension.
- Approved22 Heath Drive Sutton SM2 5RPDemolition of existing conservatory, conversion of the garage to a habitable room and erection of a single storey front and rear extension and raised patio with steps to rear garden.
- Refused69 Langley Avenue Worcester Park KT4 8PDDemolition of existing dwelling and erection of a detached two storey dwellinghouse with attached garage.
- Approved35 Kingsmead Avenue Worcester Park KT4 8XAErection of a single storey rear extension and raised patio to rear.
- Refused30 Ebbisham Road Worcester Park KT4 8NEErection of a two storey side extension, a single storey rear extension, and provision of rooflights to existing single storey rear extension. Conversion of loft space involving a dormer extension at rear and rooflight to front roofslope.
- Approved53 Gleneagle Road London SW16 6AYCertificate of lawful use for the existing sub-division of the ground and lower ground floor of Flat 1, 53 Gleneagle road into 2 self-contained units for continued use since 2012.
- Refused22 Heath Drive Sutton SM2 5RPErection of a single storey front and rear extension, first floor side extension, conversion of garage into habitable room, alterations to roof of garage and raised patio and steps at rear.
- Refused153A Rye Lane London Southwark SE15 4TLConstruction of a mansard roof addition and rear terrace to provide 2 additional bedrooms to unit 3.
- Approved14 Caldbeck Avenue Worcester Park KT4 8BQErection of a single storey rear extension.
- Approved31 The Circle, London, NW2 7QRPrior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 4.75m Maximum height - 3m Eaves height - 3m
- Approved29 Gibbon Road Kingston Upon Thames KT2 6ADErection of single storey wrap-around side and rear extension. Installation of solar panel and associated changes to fenestration
- Approved167 Richmond Road Beddington CR0 4SLErection of single storey rear extension.
- Refused27 Toley Avenue, Wembley, HA9 9TDCertificate of Lawfulness for proposed demolition of existing single storey rear extension and erection of a part single storey, part two storey rear extension, proposed hip to gable end roof extension, rear dormer window, onerear rooflight and four front rooflights to dwellinghouse
- Approved39B Vestry Road London Southwark SE5 8PGConstruction of a roof terrace on the flat roof of the existing second floor outrigger with frosted balustrades 1.7m in height; changes to the fenestration at second floor level to the rear.
- Approved84 Boundary Road Carshalton SM5 4ABDemolition of existing rear extension and erection of part one, part two storey rear and side extension and installation of roof lights to front and side roof slopes. Conversion of detached garage ancillary to the main house and provision of a patio area with two sets of steps to the side.
- Refused146A Stafford Road Wallington SM6 9BSErection of a two-storey rear extension to the residential unit to create a double garage and an office space above. Provision of a side entrance gate to staircase serving the upper floor residential unit and removal of a rear door between retail and proposed residential extension.
- Withdrawn167 Richmond Road Beddington CR0 4SLConversion of the existing dwellinghouse into two self-contained residential units, involving erection of a single storey rear extension and a dormer extension at rear and provision of cycle stores.
- Approved8 Tollhouse Lane Wallington SM6 9PAErection of a rear dormer extension.
- Approved9 Hilbert Road North Cheam SM3 9TFConversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.
- Approved33 Athenlay Road London SouthwarkConstruction of a roof terrace above the existing back addition with screen opaque frosted glass.
- Approved60 Alberta Avenue Cheam SM1 2LLRetrospective application for the completion and retention of the partial demolition of existing single storey rear extension, erection of a single storey rear extension including the installation of an air conditioning unit, extension to the existing rear dormer including alterations to rooflights to front roofslope and removal of a chimney stack, alterations to front, rear and flank fenestration and installation of a canopy roof over the front entrance.
- Approved1 The Avenue Coulsdon CR5 2BNErection of a hip to gable roof extension on two sides and associated internal reconfigurations. Demolition of existing rear extension and the erection of single storey rear extension by 4m with a maximum height of 3m.
- Approved60 Alberta Avenue Cheam SM1 2LLErection of an outbuilding in rear garden.
- Approved6 Porden Road London SW2 5RTCertificate of lawfulness (proposed) for rear dormer roof extension with Juliet balcony and 2 front roof lights.
- Approved8 Tollhouse Lane Wallington SM6 9PAErection of a single storey rear/side extension, a single storey infill side extension, a single storey front extension and conversion of garage into habitable room with alterations to existing garage roof.
- Approved21 Rixsen Road Manor Park London E12 6RNApplication for a Lawful Development Certificate for a proposed loft conversion with rear dormer and windows to the front and rear elevation.
- Approved82 Norfolk House Road London SW16 1JHReplacement of the existing conservatory with a single storey ground floor rear/side infill extension.
- Withdrawn21 Rixsen Road Manor Park London E12 6RNPrior notification application for the construction of TWO single storey rear extensions. The details submitted are as follows: Extension 1: The proposed extension will extend beyond the rear wall by 6m The maximum height of the proposed extension from the natural ground level is 2.6m The height at eaves level of the proposed extension measured from the natural ground level is 2.6m Extension 2: The proposed extension will extend beyond the rear wall by 4.695m The maximum height of the proposed extension from the natural ground level is 2.6m The height at eaves level of the proposed extension measured from the natural ground level is 2.6m
- ApprovedGarage Workshop Rear Of 557 London Road North Cheam SM3 9AEErection of a single storey side and rear extension with alterations to workshop roof.
- Approved2 Willoughby Mews London SW4 0QHConversion of the garage to create habitable room, including the installation of 4 windows plus front entrance infill extension together with the erection of a single storey ground floor rear extension.
- Approved31 Courtenay Road Worcester Park KT4 8RYErection of a single storey side extension.
- Approved93 Sparrow Farm Road Stoneleigh KT17 2LPErection of part one, part two storey side and rear extension incorporating an attached garage.
- Approved90 And 92 Green Lane Worcester Park Sutton KT4 8ARConversion of loft space involving increase in ridge height and alterations to the existing roofline to both properties.
Planning history · public registers
Strong planning approval history
87% approvedapproved
87% of Extension Architecture's decided planning applications were approved (310 of 355 decisions across 10 councils). 388 applications tracked in total.
87%
Approval rate
310
Approved
355
Decisions
10
Councils
From council planning registers. This is planning-decision context from public planning data, not a guarantee of workmanship or service quality.
Reviews · public evidence
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