House extensions in Greater Cambridge

Greater Cambridge received 570 householder applications in the last 12 months - about 11 a week. Rear extensions and garage works are the most common. Of the 295 decided so far, 284 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

419 last 90 days
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119 last 30 days
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44 last 14 days

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Showing 50 of 419 applications
26/02334/FUL 2 days ago Awaiting decision

182-186 The Carpenters Arms Victoria Road Cambridge Cambridgeshire CB4 3DZ

Retrospectove open timber pergola formed from 8no. 120x120mm tanalised timber posts on stainless steel shoes and external tv to sit within pergola.

Greater Cambridge
26/02160/FUL 9 Jul 2026 Awaiting decision

The Perse Upper School Hills Road Cambridge Cambridgeshire CB2 8QF

Relocation of existing door to rifle range and the installation of an additional door on the opposite side of the building.

Greater Cambridge 9 Jul 2026
26/02520/HFUL 8 Jul 2026 Awaiting decision

147 Gwydir Street Cambridge Cambridgeshire CB1 2LJ

Single storey rear extension, following demolition of existing single storey rear extension.

Householder Works/Extension Greater Cambridge 8 Jul 2026
26/02345/LBC 8 Jul 2026 Awaiting decision

Westcott House Jesus Lane Cambridge Cambridgeshire CB5 8BP

External landscaping works to form new ramped and stepped access including removal of part of retaining wall. Alterations to existing door openings. N...

Listed Building Consent Greater Cambridge 8 Jul 2026
26/02598/CL2PD 8 Jul 2026 Awaiting decision

138 Ditton Lane Fen Ditton Cambridgeshire CB5 8SS

Certificate of lawfulness under S192 for a Hip to gable roof extension with rear facing dormer and 1 No. rooflight to front elevation.

Greater Cambridge 8 Jul 2026
26/02124/FUL 8 Jul 2026 Awaiting decision

1-3 Flat Brookfields Cambridge Cambridgeshire CB1 3NW

Retrospective installation of Security roller Shutters to front and side elevations.

Greater Cambridge 8 Jul 2026
26/02586/S73 8 Jul 2026 Awaiting decision

52 High Street Fen Ditton Cambridgeshire CB5 8ST

S73 to vary condition 2 (Approved plans) of planning permission S/0363/19/FL (Proposed front and side extensions) to extend the house to the front and...

Greater Cambridge 8 Jul 2026
26/02352/HFUL 7 Jul 2026 Awaiting decision

Stable Cottage 18 Chishill Road Heydon Cambridgeshire SG8 8PW

Convert existing car port into art studio and create a link extension between existing dwelling and art studio.

Householder Works/Extension Greater Cambridge 7 Jul 2026
26/02582/LBC 7 Jul 2026 Awaiting decision

24 Cantelupe Road Haslingfield Cambridgeshire CB23 1LU

Foundation underpinning works, localised to the front (northern) elevation and the return at the western gable of the subject property, and the replac...

Greater Cambridge 7 Jul 2026
26/02576/LBC 7 Jul 2026 Awaiting decision

2 And 3 Melbourne Place Cambridge Cambridgeshire CB1 1EQ

Removal of the existing internal staircase serving the ground and first floors, together with the installation of a new replacement staircase and asso...

Greater Cambridge 7 Jul 2026
26/02570/PRIOR 7 Jul 2026 Awaiting decision

Young Street Building Young Street Cambridge Cambridgeshire CB1 2LZ

Installation of a roof top guardrail for safety improvements to roof top access.

Greater Cambridge 7 Jul 2026
26/02306/HFUL 6 Jul 2026 Awaiting decision

24 Church Road Teversham Cambridgeshire CB1 9AZ

Single storey rear extension following demolition of existing conservatory. Porch extension to front entrance. Alterations to fenestration and rooflig...

Householder Works/Extension Greater Cambridge 6 Jul 2026
26/02552/HFUL 6 Jul 2026 Awaiting decision

550 Coldhams Lane Cambridge Cambridgeshire CB1 3JL

Demolition of garage, single storey rear and side extensions and two storey side extension

Greater Cambridge 6 Jul 2026
26/02547/LBC 6 Jul 2026 Awaiting decision

2 The Green Foxton Cambridgeshire CB22 6ST

Repair of existing chimney to include the removal of existing cementitious materials, followed by conservation-led repair using traditional lime-based...

Greater Cambridge 6 Jul 2026
26/02550/HFUL 6 Jul 2026 Awaiting decision

4 Highworth Avenue Cambridge Cambridgeshire CB4 2BG

Two storey side and front extension with associated fenestration, single storey rear extension, and roof extension including hip to gable, raising of ...

Greater Cambridge 6 Jul 2026
26/02553/HFUL 6 Jul 2026 Awaiting decision

7 Cranleigh Close Cambridge Cambridgeshire CB2 9NP

Single storey rear extension, following demolition of existing conservatory. Replacement side door and sun pipe to roof.

Greater Cambridge 6 Jul 2026
26/02561/FUL 6 Jul 2026 Awaiting decision

29 Cambridge Science Park Milton Road Cambridge Cambridgeshire CB4 0DW

Installation of an external roof top plant, replacement glazing with solid panels and externally applied vinyls to first floor

Greater Cambridge 6 Jul 2026
26/02546/LBC 6 Jul 2026 Awaiting decision

School House High Street Shingay Cum Wendy Cambridgeshire SG8 0HJ

Remove chimney stacks above eaves level and rebuild to original details and heights.

Greater Cambridge 6 Jul 2026
26/02545/HFUL 6 Jul 2026 Awaiting decision

School House High Street Shingay Cum Wendy Cambridgeshire SG8 0HJ

Remove chimney stacks above eaves level and rebuild to original details and heights.

Greater Cambridge 6 Jul 2026
26/02533/PRIOR 3 Jul 2026 Awaiting decision

21 Tamarin Gardens Teversham Cambridge South Cambridgeshire CB1 9GQ

Single storey rear extension.

Prior Approval Greater Cambridge 3 Jul 2026
26/02530/CL2PD 3 Jul 2026 Awaiting decision

1A Sherbourne Close Cambridge Cambridgeshire CB4 1RT

Certificate of lawfulness under S192 for a proposed single storey rear extension.

Lawful Use Certificate (S192) Greater Cambridge 3 Jul 2026
26/02529/HFUL 3 Jul 2026 Awaiting decision

6 Fenbridge Cambourne Cambridgeshire CB23 5AD

Erection of outbuilding in rear garden.

Householder Works/Extension Greater Cambridge 3 Jul 2026
26/02543/LBC 3 Jul 2026 Awaiting decision

Memorial Court Clare College Queens Road Cambridge Cambridgeshire CB3 9AJ

Removal of existing boilers and associated alterations to plant rooms, upgrading of insulation in the roofs, upgrading of radiators and alterations to...

Greater Cambridge 3 Jul 2026
26/02493/CL2PD 2 Jul 2026 Awaiting decision

88 High Street Landbeach Cambridgeshire CB25 9FT

Certificate of lawfulness under S192 for garage conversion into habitable living space.

Lawful Use Certificate (S192) Greater Cambridge 2 Jul 2026
26/02460/HFUL 2 Jul 2026 Awaiting decision

17 Thornton Road Girton Cambridgeshire CB3 0NP

Single storey side and rear extension

Householder Works/Extension Greater Cambridge 2 Jul 2026
26/02183/FUL 2 Jul 2026 Awaiting decision

Anglia Ruskin University, Coslett Building East Road Cambridge Cambridgeshire CB1 1PT

Amendments to Coslett Building Ground Floor include facade changes and minor changes to the upper floor existing facade to accommodate temporary venti...

Full Application Greater Cambridge 2 Jul 2026
26/02383/HFUL 2 Jul 2026 Awaiting decision

7 Kings Grove Barton Cambridgeshire CB23 7AZ

Erection of detached shed to side of dwelling and replacement of existing hedge with 2m high fence.

Householder Works/Extension Greater Cambridge 2 Jul 2026
26/02360/HFUL 1 Jul 2026 Awaiting decision

275 Wellbrook Way Girton Cambridgeshire CB3 0GL

Convert existing garage into habitable living space, installation of bike racks to rear and creation of hard surface area to front.

Householder Works/Extension Greater Cambridge 1 Jul 2026
26/02414/HFUL 1 Jul 2026 Awaiting decision

45 Humberstone Road Cambridge Cambridgeshire CB4 1JD

Replacement of existing rear extension with a single-storey rear/side extension, construction of rear roof dormer extension, installation of front roo...

Householder Works/Extension Greater Cambridge 1 Jul 2026
26/02238/HFUL 1 Jul 2026 Awaiting decision

158 Cambridge Road Great Shelford Cambridgeshire CB22 5JU

Roof extension including raising of ridge height and removal of side dormer and chimney. Alterations to fenestration, canopy to side door and juliette...

Householder Works/Extension Greater Cambridge 1 Jul 2026
26/02492/HFUL 1 Jul 2026 Awaiting decision

9 Lovell Road Cambridge Cambridgeshire CB4 2QN

Single storey rear extension with sedum roof. Hip to gable roof extension including rear dormer and 1no. rooflight. Erection of garden room in rear ga...

Householder Works/Extension Greater Cambridge 1 Jul 2026
26/02461/LBC 30 Jun 2026 Awaiting decision

64 High Street Harlton Cambridgeshire CB23 1ES

Retention removal of existing damaged sand cement render. Carry out timber frame repairs and apply timber lath and lime render.

Listed Building Consent Greater Cambridge 30 Jun 2026
26/02467/HFUL 30 Jun 2026 Awaiting decision

39 Montague Road Cambridge Cambridgeshire CB4 1BU

Proposed single storey rear extension plus garden outbuilding

Householder Works/Extension Greater Cambridge 30 Jun 2026
26/02474/LBC 30 Jun 2026 Awaiting decision

1 Trumpington Street Cambridge Cambridgeshire CB2 1QA

Internal repairs at ground floor due to moisture ingress affecting timber joists, lintels and plasterwork

Listed Building Consent Greater Cambridge 30 Jun 2026
26/02469/LBC 30 Jun 2026 Awaiting decision

Downing Site, The Sedgwick Museum Of Earth Sciences Downing Street Cambridge Cambridgeshire CB2 3EQ

Installation of a lifting platform on ground floor and associated works

Listed Building Consent Greater Cambridge 30 Jun 2026
26/02463/LBC 30 Jun 2026 Awaiting decision

37 High Street Little Shelford Cambridgeshire CB22 5ES

Create a new first floor staircase to access the loft.

Listed Building Consent Greater Cambridge 30 Jun 2026
26/02365/HFUL 29 Jun 2026 Awaiting decision

9 Mill Lane Bassingbourn Cum Kneesworth Cambridgeshire SG8 5PR

Single storey rear extension, new first floor window and internal alterations

Householder Works/Extension Greater Cambridge 29 Jun 2026
26/02026/LBC 29 Jun 2026 Awaiting decision

58 Heydon Road Great And Little Chishill Cambridgeshire SG8 8SR

1. Repair existing garden wall to west of driveway, with like-for-like materials, 2. Repair existing garden wall to south of driveway, with like-for-l...

Greater Cambridge 29 Jun 2026
26/02448/CL2PD 29 Jun 2026 Awaiting decision

16 Swallow Close Longstanton Cambridgeshire CB24 3EU

Certificate of lawfulness under S192 for garage extension.

Lawful Use Certificate (S192) Greater Cambridge 29 Jun 2026
26/02326/HFUL 29 Jun 2026 Awaiting decision

382 Milton Road Cambridge Cambridgeshire CB4 1SU

Creation of the dropped kerb to form a new vehicular access and new hard surfacing for parking.

Householder Works/Extension Greater Cambridge 29 Jun 2026
26/02453/FUL 29 Jun 2026 Awaiting decision

23 Marshalls Close Teversham Cambridgeshire CB1 9AR

Part single storey rear, part double storey rear and side extensions, internal reconfigurations and dropped kerb to an existing 2 bed semi detached dw...

Full Application Greater Cambridge 29 Jun 2026
26/02447/HFUL 29 Jun 2026 Awaiting decision

214 Coldhams Lane Cambridge Cambridgeshire CB1 3HH

Removal of shed and construction of a single storey annexe building in rear garden.

Householder Works/Extension Greater Cambridge 29 Jun 2026
26/02450/LBC 29 Jun 2026 Awaiting decision

Clare College, Old Court Trinity Lane Cambridge Cambridgeshire CB2 1TL

Internal alterations to form new storage area within existing buttery and associated works.

Listed Building Consent Greater Cambridge 29 Jun 2026
26/02349/HFUL 29 Jun 2026 Awaiting decision

13 Green Lane Linton Cambridgeshire CB21 4JZ

Remove existing rear garden shed and replace with a summerhouse.

Householder Works/Extension Greater Cambridge 29 Jun 2026
26/02321/CL2PD 26 Jun 2026 Awaiting decision

280 Cambridge Science Park Milton Road Cambridge Cambridgeshire CB4 0WE

Certificate of lawfulness under S192 for inserting fire barriers behind the existing cladding.

Lawful Use Certificate (S192) Greater Cambridge 26 Jun 2026
26/02377/FUL 26 Jun 2026 Awaiting decision

5 Davy Road Cambridge Cambridgeshire CB1 3QW

Two storey front extension, a single storey rear extension (following the removal of the existing side and single storey rear extensions). Conversion ...

Full Application Greater Cambridge 26 Jun 2026
26/02430/FUL 26 Jun 2026 Awaiting decision

50 River Lane Cambridge Cambridgeshire CB5 8HP

Change of use from office (Class E) to residential (Class C3) with external alterations to create 1no 1bed maisonette on the ground floor.

Full Application Greater Cambridge 26 Jun 2026
26/02344/FUL 26 Jun 2026 Awaiting decision

Westcott House Jesus Lane Cambridge Cambridgeshire CB5 8BP

External landscaping works to form new ramped and stepped access including removal of part of retaining wall. Alterations to existing door openings. N...

Full Application Greater Cambridge 26 Jun 2026
26/02436/CL2PD 26 Jun 2026 Awaiting decision

The Chestnuts Granta Vale Linton Cambridgeshire CB21 4LB

Certificate of lawfulness under S192 for single storey rear extension.

Lawful Use Certificate (S192) Greater Cambridge 26 Jun 2026
26/02437/HFUL 26 Jun 2026 Awaiting decision

17 Merton Street Cambridge Cambridgeshire CB3 9JD

Demolition of existing conservatory and replacement single storey rear/side extension.

Householder Works/Extension Greater Cambridge 26 Jun 2026
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Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits — taller, larger, in a protected area — needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases (especially with objections) can take longer.
Can I get email alerts for new extensions applications in Greater Cambridge?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Greater Cambridge. You can also narrow the alert to a postcode, street, or drawn area.

We check Greater Cambridge's planning portal daily. New extensions applications appear here within a day of being published.