Public evidence profile
Extension Architecture
Planning history
130 public planning applications
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Extension Architecture’s real planning history from public planning applications, showing where they’ve worked and how often schemes were approved. · Active 2017–2026
approval rate78%
planning applications130
approved schemes85
councils worked in14
What they work on
The kinds of project Extension Architecture has filed planning applications for.
- Loft conversion29
- Rear extension57
- Side extension19
- Two-storey extension21
- Extension81
- Basement4
- Change of use12
- Outbuilding / garden room2
- Conservatory / orangery8
- Balcony / roof terrace8
- Porch3
- Driveway / dropped kerb1
- Boundary wall / fence / gates3
- Listed building / conservation3
- Shopfront / commercial1
- Demolition20
- Windows & doors3
- Roof / fenestration27
- Advertisement / signage1
- Solar / renewables3
Where they’ve worked
Each pin is a planning application, coloured by the council decision we found.
Council experience
- Sutton · 43 applications since 2017See planning experience in Sutton
- Lambeth · 25 applications since 2017See planning experience in Lambeth
- Southwark · 13 applications since 2021See planning experience in Southwark
- Ealing · 9 applications since 2017See planning experience in Ealing
- Bromley · 8 applications since 2017See planning experience in Bromley
- Greenwich · 7 applications since 2017See planning experience in Greenwich
- Lewisham · 6 applications since 2017See planning experience in Lewisham
- Newham · 6 applications since 2017See planning experience in Newham
- Brent · 5 applications since 2022See planning experience in Brent
- Hammersmith and Fulham · 3 applications since 2017See planning experience in Hammersmith and Fulham
- Westminster · 2 applications since 2017See planning experience in Westminster
- Croydon · 1 application since 2021See planning experience in Croydon
- Kingston · 1 application since 2022See planning experience in Kingston
- Tower Hamlets · 1 application since 2019See planning experience in Tower Hamlets
Recent planning applications
- No decision8 Perimeade Road Perivale UB6 7ARDetails of Construction Environmental Management Plan pursuant to Condition 8 of planning permission ref: 260107FUL dated 14th April 2026
- No decision8 Perimeade Road Perivale UB6 7ARDetails of Materials and External Surfaces pursuant to Condition 3 of planning permission ref: 260107FUL dated 14th April 2026
- No decision65 The Gallop Sutton SM2 5SAErection of a part one, part two storey front, side and rear extension, formation of a front entrance porch and conversion of loft space involving alterations to existing roofline, a dormer extension at front, side and rear with rooflights to front roofslope.
- 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.
- Approved42 Runnymede Crescent London SW16 5UDApplication for Certificate of Lawfulness (Proposed) with respect to the change of use from single dwelling (Use Class C3) to 6 bedroom small HMO (Use Class C4) and the erection of a hip-to-gable roof extension with rear dormer together with the installation of 3 rooflights to the front roof slope and replacement of window with door at ground floor rear elevation.
- No decision27 Haslam Avenue Sutton SM3 9NDErection of a single storey rear extension.
Show all 60 planning applicationsShow fewer planning applications
- 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.
- Refused50 Bushey Road Sutton SM1 1QSErection of an attached two storey dwelling with refuse and cycle storage to the front.
- 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.
- Refused38 Downton Avenue London SW2 3TRFormation of a roof terrace to the rear outrigger including a metal railing balustrade, along with other associated works (Flat A).
- Approved211 Bridgewood Road Worcester Park KT4 8XUConversion of garage into habitable room with alterations to front fenestration.
- ApprovedAmbleside, Orpington Road, Chislehurst, BR7 6RAErection of a single storey outbuilding with garden room, gym and bathroom
- 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
- Approved19 CROSIER CLOSE, KIDBROOKE, LONDON, SE3 8NTConstruction of a single storey rear extension with 2no. skylights to the flat roof; enlargement of existing front porch and associated external works
- Refused12 BROAD WALK, KIDBROOKE, LONDON, SE3 8NBCertificate of Lawfulness (Proposed) for loft conversion incorporating a hip to gable roof and rear dormer and roof windows (under permitted development rights- less than 50m3).
- Approved12 BROAD WALK, KIDBROOKE, LONDON, SE3 8NBDemolition of existing conservatory and construction of a single storey rear extension.
- 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.
- Refused72 - 74 Gipsy Hill London SE19 1PDChange of use from residential dwellinghouse (Class C3) to short term let (Airbnb) (Class C1). (Flat 3)
- Approved278 ARDGOWAN ROAD, LONDON, SE6 1XAApplication for a Lawful Development Certificate (Proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) and Class L of Schedule 2, Part 3, of the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) for the change of use from C3 (single family dwellinghouse) to C4 (small HMO up to 6 residents) at 278 Ardgowan Road SE6.
- Refused131 Higher Drive Banstead SM7 1PSErection of a first floor side extension with rooflights to flank and rear roofslopes.
- 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)
- WithdrawnJesmund Nursing Home 29 York Road Cheam SM2 6HLChange of use of the detached outbuilding to the rear of the property, fronting Holland Avenue from C2 (secure residential institutions - adult nursing home) to C3.b (residential - not more than six residents living together as a single household where care is provided for residents) to provide a detached two storey dwellinghouse with parking spaces accessed to/from Holland Avenue, including the retention of the increase of overall footprint, alterations of site levels, concrete base to the building, provision of an access ramp and steps leading up to the entrance door and alterations to the ground and first floor front, rear and flank fenestrations.
- 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.
- Approved35 Dordrecht Road Acton London W3 7TFSingle storey detached outbuilding for use as home office (Lawful Development Certificate for an Existing Development)
- Approved2 Atkinson Road West Beckton London Newham E16 3LRApplication for a lawful development certificate for the proposed erection of single storey rear extension together with the conversion of existing garage into an inhabitable space.
- 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.
- Approved87 Shaftesbury Road Carshalton SM5 1HJErection of a single storey rear extension.
- 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.
- Approved90 Farnaby Road, Bromley, BR1 4BHPart hip to gable loft conversion including rear dormer and three front rooflightsLAWFUL DEVELOPMENT CERTIFICATE (PROPOSED)
- 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.
Heritage experience: 3 listed-building or conservation-area consent applications found in official planning applications.
Repeat local work: hired again on 4 different streets, at least two separate homes on each.
4 of these applications were submitted after the work had started (retrospective consent).
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