Peterhouse, Cosin Court Trumpington Street Cambridge Cambridgeshire CB2 1RD Data via plota.co.uk
26/01450/FUL - Full Application
Approved
Proposal
New glazing works and balcony alterations. Data via plota.co.uk
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View original council record ↗Last checked
Application progress
✓
Received
15 Apr 2026
✓
Consultation
8 May 2026
✓
Approved
10 Jun 2026
Approved on 10 Jun 2026 · Delegated Decision · Last checked 9 Jul 2026
Documents 14
Decision & officer reports 2
Statements & assessments 2
Application forms 2
Consultation & comments 4
Other documents 4
PDF
ACKNOWLEDGEMENT LETTER
Application Officer Correspondence · 17 Apr 2026
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PDF
SITE NOTICE
Application Press/Site Notices · 17 Apr 2026
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PDF
ATTACHMENT SUMMARY FROM PORTAL
Attachment Summary · 15 Apr 2026
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PDF
BROCHURE SLIDING AND SLIDE FOLDING DOORS
Application Information · 15 Apr 2026
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Site constraints 9
40 listed buildings within 150 m of the postcode pin
Nearest: Peterhouse, the Buildings Surrounding First Court, Old Court and Gisborne Court, Grade I, the postcode pin is inside its outline · 8 Grade I, 3 Grade II*, 29 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 40 with distances
- 0 mPeterhouse, the Buildings Surrounding First Court, Old Court and Gisborne CourtGrade I
- 47 mChurch of St Mary the LessGrade II*
- 51 mRailings and Gates and Gas Lamp Bordering the Churchyard of St Mary the Less on North and West SidesGrade II
- 54 mMuseum of Classical Archaeology Peterhouse, Arch in North Boundary Wall of the CollegeGrade II
- 54 mPeterhouse, West Boundary Wall of the GroveGrade II
- 56 mFen Court at PeterhouseGrade II
- 63 mPeterhouse, Entrance Screen to First CourtGrade I
- 66 mHobson's ConduitGrade II
- 70 mNumber 1 Little St Marys Lane Including Gas Lamp Attached to the South East CornerGrade II
- 70 m8-11, LITTLE ST MARY'S LANE (See details for further address information)Grade II
- 71 mChurch Fence of St Mary the Less Fronting Trumpington StreetGrade II
- 72 mEmmanuel United Reformed ChurchGrade II
- 74 mRichardson Candle group at St Catharine's College and northern Trumpington StreetGrade II
- 76 mPeterhouse, Gates and Piers of the Master's LodgeGrade I
- 78 mPembroke College, Red BuildingGrade II
- 81 mRichardson Candle group in Trumpington Street including the Fitzwilliam MuseumGrade II
- 82 mFitzwilliam Museum and boundary wall, plinths and gates to the north-eastGrade I
- 85 mFence Along Street Frontage of the Main Block of the Fitzwilliam MuseumGrade I
- 86 m39 and 40, Trumpington StreetGrade II
- 92 mPembroke College, Screen Entrance From Trumpington Street Between the Chapel and the Red BuildingGrade II
- 92 mPeterhouse, the Master's LodgeGrade I
- 95 mPembroke College, the Chapel With Hitcham's CloisterGrade I
- 95 mThe Little Rose InnGrade II
- 101 m74, Trumpington StreetGrade II
- 103 mPembroke College, the Buildings Surrounding Old Court (Except the Chapel and Cloister) and Ivy CourtGrade I
- 108 m35 and 36, Trumpington StreetGrade II
- 112 mCambridge University CentreGrade II
- 113 mPeterhouse, Outbuilding to North East of Master's LodgeGrade II
- 115 mPembroke College, LibraryGrade II*
- 115 mBuildings Surrounding Tunwell's CourtGrade II
- 118 mHouse Adjoining Number 74 on the NorthGrade II
- 126 m1, Mill LaneGrade II
- 127 m31, Trumpington StreetGrade II*
- 134 mPembroke College, Statue of William Pitt the Younger Outside the LibraryGrade II
- 137 mMill Haven, East HouseGrade II
- 137 mCambridge University Press (Pitt Press) University PressGrade II
- 140 m30, Trumpington StreetGrade II
- 146 mMill Haven, West HouseGrade II
- 148 m51 Trumpington Street and 2 Pembroke Street with wall-mounted Richardson CandleGrade II
- 149 m16-24, Fitzwilliam StreetGrade II
Historic Core conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Local nature reserve about 55 m away: Sheep's Green and Coe Fen
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Air quality management area: Cambridge AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Registered park or garden about 217 m away: Queens' College; Inside the Cambridge (Cambridge) built-up area; National infrastructure project about 1414 m away: East West Rail - Bedford to Cambridge and Western improvements, at pre-application; Green belt about 57 m away: Cambridge.
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site
Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Planning Inspectorate and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
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Important details
How this decision compares
Decided in 56 days from validation, about the council's usual 54 days. Approved, as 96% of extensions here are.
This one56d
Council54d
UK55d
82%decided within 8 weeks
96%approved
490decided in the last year
Plota live figures for extensions decided by Cambridge in the last twelve months, from validation. Cambridge decision record →
Consultation & key dates
- Site or press notice
- 8 May 2026
- Statutory expiry
- 10 Jun 2026
- Env. assessment
- No
Historical activity at this location
31 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
2024
Approved
T1 - Magnolia - Cut back crown to the west by 2.5m and to the east by 1m. T2 - Crab Apple…
2024
Approved
T1 - Magnolia - Cut back crown to the west by 2.5m and to the east by 1m. T2 - Crab Apple…
2023
Approved
Installation of photovoltaic cells to Cosin Court Roof.
2023
Approved
Installation of photovoltaic cells to Cosin Court Roof.
2022
Approved
Re-location of existing bin store from southwest corner to east end of Cosin Court.
2022
Approved
Re-location of existing bin store from southwest corner to east end of Cosin Court.
Within ~100m
Nearby activity
2025
Withdrawn
6 Little St Marys Lane Cambridge Cambridgeshire CB2 1RR
Single storey rear extension, replacement rear dormer and internal alterations
2025
Withdrawn
6 Little St Marys Lane Cambridge Cambridgeshire CB2 1RR
Single storey rear extension, replacement rear dormer and internal alterations
2025
Approved
Peterhouse, Old Court Trumpington Street Cambridge Cambridgeshire CB2 1RD
Repair stone paving slabs in the dining hall passage
2025
Approved
Peterhouse, Old Court Trumpington Street Cambridge Cambridgeshire CB2 1RD
Repair stone paving slabs in the dining hall passage
2025
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
Installation of three CCTV cameras, 2no. internal to the Porters Lodge and 1no. Externall…
2025
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
Installation of three CCTV cameras, 2no. internal to the Porters Lodge and 1no. Externall…
2025
Approved
Pembroke College Trumpington Street Cambridge Cambridgeshire CB2 1RF
Internal alterations for the replacement of 3no. existing doors to be replaced with new s…
2025
Approved
Pembroke College Trumpington Street Cambridge Cambridgeshire CB2 1RF
Internal alterations for the replacement of 3no. existing doors to be replaced with new s…
2024
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1 Fig tree Fell to ground level and treat stumps.
2024
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1 Fig tree Fell to ground level and treat stumps.
2025
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1 Magnolia - Fell to ground level and grind stump 300mm below ground level.
2025
Approved
Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1 Magnolia - Fell to ground level and grind stump 300mm below ground level.
2024
Approved
Peterhouse Hostel Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1: Lime - Prune 2no roots that are lifting paving slabs and causing a trip hazard - 1. R…
2024
Approved
Peterhouse Hostel Peterhouse Trumpington Street Cambridge Cambridgeshire CB2 1RD
T1: Lime - Prune 2no roots that are lifting paving slabs and causing a trip hazard - 1. R…
2024
Approved
Peterhouse, Old Museum Of Classical Archaeology Building Trumpington Street Cambridge Cambridgeshire CB2 1RD
Installation of 2 No. balustrades next to stage steps, 2 No. wall fixed hand rails and 13…
2024
Approved
Peterhouse, Old Museum Of Classical Archaeology Building Trumpington Street Cambridge Cambridgeshire CB2 1RD
Installation of 2 No. balustrades next to stage steps, 2 No. wall fixed hand rails and 13…
2024
Approved
Peterhouse, Burroughs Building Trumpington Street Cambridge Cambridgeshire CB2 1RD
Alterations to the College Office to open up an existing window and internal door, remova…
2024
Approved
Peterhouse, Burroughs Building Trumpington Street Cambridge Cambridgeshire CB2 1RD
Alterations to the College Office to open up an existing window and internal door, remova…
2024
Approved
Peterhouse, Music Room Old Court Trumpington Street Cambridge Cambridgeshire CB2 1RD
Acoustic stud wall to Fellows Office and shower in adjacent area.
2024
Approved
Peterhouse, Music Room Old Court Trumpington Street Cambridge Cambridgeshire CB2 1RD
Acoustic stud wall to Fellows Office and shower in adjacent area.
2021
Approved
Peterhouse Trumpington Street Cambridge CB2 1RD
Within the 2nd floor of Noah's Ark - West Block of Old Court Peterhouse, to renovate and…
2021
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1 Little St Marys Lane Cambridge CB2 1RR
New window in existing rear first floor door opening following the removal of existing st…
2021
Approved
1 Little St Marys Lane Cambridge CB2 1RR
New window in existing rear first floor door opening following the removal of existing st…
2019
Approved
Redevelopment Area Of Mill Lane Cambridge Cambridgeshire
Demolition of rear two storey extension to Kenmare House, dwarf wall of Kenmare House fro…
2019
Approved
Redevelopment Area Of Mill Lane Cambridge Cambridgeshire
Redevelopment of site to form expansion of Pembroke College comprising repurposing of exi…
Cambridge
Planning Authority Score
8.3/10
Excellent
#18 of 296 councils
Relevant to this application:
Householder decisions
Cambridge is one of the fastest councils in England for householder decisions, ranking #21 out of 296. Only 26% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).
Among the fastest councils in England
for householder decisions
These figures are council-wide context, not a prediction for this application.
View full council performance
Cambridge decision statistics
Based on MHCLG data, the year to March 2026
90%
Overall approval rate
Above avg (87%) #108 of 296
94%
Householder approved
Above avg (90%) #100 of 296
86%
Decided in 8 weeks
Above avg (63%) #21 of 296
26%
Extended time limit
Below avg (41%) #34 of 296
74%
Minor dwellings approved
86 decided (1-9 homes)
80%
Major dwellings approved
5 decided (10+ homes)
80%
Change of use approved
41 decided
1,014
Total decisions
100 refused in the year to March 2026
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Peterhouse, Cosin Court Trumpington Street Cambridge Cambridgeshire CB2 1RD
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