Spotted when a home's energy certificate shows at least 15 m² (and 15%) more floor area than an earlier one. Only homes with two certificates show up, so the real number is higher. A busy street suggests extensions get permission here; check the council's planning register for the details.
Storm overflows within 2 km
3storm overflows within 2 km
114hours of spills in 2025 between them (typical neighbourhood: about 36)
New-home postcodes with fewer than 5 homes are counted above but not listed. 45 postcodes nearby had new homes completed in the last two years.
Approved
12, Mortimer Road, CR4 3HSERECTION OF A PART SINGLE, PART TWO STOREY REAR EXTENSION, A TWO STOREY SIDE EXTENSION, A HIP TO GABLE ROOF CONVERSION AND A REAR ROOF EXTENSION.Merton 25/P3649 · All Other · 2 homes proposed
Dec 2025 450 m away
Application Received
7, Frimley Gardens, CR4 3AQCHANGE OF USE FROM A DWELLINGHOUSE (C3) TO A CHILDREN'S CARE HOME (C2)Merton 25/P3711 · All Other
Dec 2025 500 m away
Approved
7, Ashtree Avenue, CR4 3DSGF REAR AND SIDE EXTENSIONMerton 25/P3717 · Householder
Dec 2025 250 m away
Approved
44, Lavender Grove, CR4 3HUAPPLICATION FOR A REAR DORMER, X3 ROOF LIGHTS TO THE FRONT ROOF SLOPE AND X1 WINDOW TO THE SIDE FACING ROOF SLOPEMerton 25/P3621 · Householder
Dec 2025 350 m away
Comment Issued
47, Dalton Avenue, CR4 3DTAPPLICATION FOR PRIOR APPROVAL IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE STOREY REAR EXTENSION WITH A DEPTH OF 6M, MAXIMUM HEIGHT OF 3.45M AND EAVES HEIGHT OF 3M.Merton 25/P3250 · Prior Approval
Nov 2025 100 m away
Approved
89, Lavender Avenue, CR4 3RSREPLACEMENT OF EXISTING TIMBER FRAME WINDOWS WITH UPVC FRAME WINDOWS.Merton 25/P3182 · All Other
Oct 2025 350 m away
Approved
11, Tyrrell Square, CR4 3SDAPPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED ERECTION OF A SINGLE STOREY REAR EXTENSION AND REPLACEMENT WINDOWS ON FRONT ELEVATION TO FACILITATE THE CONVERSION OF GARAGE INTO HABITABLE ROOM.Merton 25/P2994 · Householder
Oct 2025 250 m away
Approved
20, Heyford Road, CR4 3EUProposed Single Storey Rear,Two Storey Side Extensions, Widening of existing drive, External Insulation and Render finish to all existing external walls with Associated Internal / External works.Merton 24/P0684 · Householder
92, 92-94 Boundary Business Court, Church Road, CR4 3TD2221_Mitcham_AdvMerton 25/P2488 · All Other
Aug 2025 400 m away
Approved
49, Mitcham Gasworks Site, Western Road, CR4 3EDMitcham Gasworks s73 2Merton 25/P1578 · All Other
Aug 2025 250 m away
Approved
26, Lulworth Crescent, CR4 3RBReplacement of 3 No. ground floor Flat 26 windows only with double glazed white Upvc windows of casement styles, to a ground floor flat positioned within a purpose built block of 6 No. flats.Merton 25/P2168 · All Other
Jul 2025 300 m away
Approved
21, Gilpin Close, CR4 3QRThe proposal replaces the existing uPVC windows with modern double glazed uPVC units. Elevations and window schedule appended to this application.Merton 25/P2031 · All Other
Jul 2025 50 m away
Refused
7, Frimley Gardens, CR4 3AQAPPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED CHANGE OF USE FROM A SINGLE DWELLINGHOUSE (C3) TO A SMALL CHILDREN'S CARE HOME (C2 USE) FOR UP TO 3 CHILDREN BETWEEN THE AGES OF 6 - 17.Merton 25/P1938 · Householder
Jul 2025 500 m away
Approved
136, Flats 136 - 149, 136 - 149 Mount Road, CR4 3RAThe proposal replaces the existing uPVC windows with modern double glazed uPVC units. Elevations and window schedule appended to this application.Merton 25/P2035 · All Other
Jul 2025 200 m away
Approved
80, Lowry Crescent, CR4 3QTThe proposal replaces the existing uPVC windows with modern double glazed uPVC units. Elevations and window schedule appended to this application.Merton 25/P2030 · All Other
Jul 2025 100 m away
Approved
100, Lavender AvenueAPPLICATION FOR REMOVAL OF EXISTING CLADDING, INSTALLATION OF REPLACEMENT OF CLADDING TO ALL FACADES AND ASSOCIATED WORKS.Merton 25/P1951 · All Other
Jul 2025 400 m away
Source: Planning London Datahub (Greater London Authority and the London boroughs); applications validated since January 2023. Data is published as received and may contain errors; check the borough's planning portal for documents.
Rooftop solar
Wyvern Estate, Beverley Way - Solar PanelsApproved, not yet built · 170 kW
Oct 2022 5.0 km away
Rooftop solar
Knights Hill - Solar PV equipmentApproved, not yet built · 180 kW
Sept 2023 5.1 km away
Running nearest: Beddington EfW (energy from waste, 3.6 km); London’s Queen Elizabeth II reservoir (solar farm, 9.7 km).
DESNZ Renewable Energy Planning Database, April to June 2026 (OGL). Projects of 150 kW and over; refused, withdrawn and abandoned ones are left out.
Minor
Cricket Green, MitchamHighway repair and maintenance works · TRANSPORT FOR LONDON (TFL) · Stop/go boards
Oct 2026 to Oct 2026 850 m away
DfT Street Manager permits (OGL), England. Dates are the planned ones; works often finish early or overrun.
Airports · Heathrow Airport and land to the north-west and west of Heathrow Airport
Planning Inspectorate list of nationally significant infrastructure projects (roads, railways, energy, water, waste), October 2026 (OGL). Each is placed at one point, usually the middle of the site; long schemes run well beyond it.