Planning application
The Mansion, Bletchley Park, Sherwood Drive, Bletchley, Milton Keynes, MK3 6EB
Works: Windows or glazing
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Listed building consent for the repair and restoration of The Bletchley Park Mansion external fabric, including brick and stone replacements, full reroofing and lead repairs, overhaul of the rainwater goods to increase capacity, the structural repair of chimneys and flues, the restoration and redecoration of the timber and crittall windows, the removal of asbestos insulation in the roof voids and the replacement of the failed condemned mansafe system
As published by the council, reference PLN/2026/0321
Application record
- Reference
- PLN/2026/0321
- Type
- Listed building consent (alterations or extension)
- Status
- Decision Made
- Decision
- Approved with Conditions
- Received
- 18 Feb 2026
- Validated
- 18 Feb 2026
- Decided
- 9 Apr 2026
- Ward
- Bletchley Park
- Parish
- West Bletchley
- Decision by
- Delegated Decision
- Postcode
- MK3 6EB
Site history
Applications at this address on the Milton Keynes register
This site has had 4 applications since 2019: 4 approved, 0 refused.
-
PLN/2026/1306 Granted
THE MANSION, BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
The crown lift to 2m above ground over footpath of Cedar (T102) protected by Milton Keynes Council Tree Preservation Order no. PS/540/15/139 and the crown lift to 4m above ground along boundary by parking bays/kerbs and prune back by 2m from street lights of mixed trees in Group E protected by Milton Keynes Council Tree Preservation Order no. PS/540/15/136
-
PLN/2026/1191 Granted
THE MANSION, BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
The crown lifting to 2m above ground level of Crab Apple (E) and Cherry trees (B, C & D), the crown reduction by 2m back from building of Willow (A), and the coppicing to ground level of self set trees and regrowth from old stump of Sycamores (G27)
-
19/02549/FUL Granted
The Mansion Bletchley Park Sherwood Drive Bletchley Milton Keynes MK3 6EB
To install a temporary modular single story classroom block.
Timeline
Dates from the published record
-
18 Feb 2026
Received by Milton Keynes
-
9 Apr 2026
Decision issued: Approved with Conditions
-
10 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
32 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat this grant of permission means
Milton Keynes granted permission on 9 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
The crown reduction by 5m of 2x Blue Atlas Cedar (T74-75), and reduction to previous points (approx 5m) of Lime (T104), protected by Milton Keynes Council Tree Preservation Order no. PS/450/15/139
Granted Trees 6 docs -
BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
To crown lift lower branches/limbs overhanging road to 3.5m above ground of 1x Copper Beech tree (T83) protected by Milton Keynes Council Tree Preservation Order PS/540/15/139
Granted Trees 5 docs -
BLETCHLEY PARK, WILTON AVENUE, BLETCHLEY, MILTON KEYNES, MK3 6EB
The crown lift of secondary branches up to 25mm diameter to 2.5m above ground of Oak Tree (T29) protected by Milton Keynes Council Tree Preservation Order no. PS/540/15/139
Granted Trees 5 docs -
BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
Listed building consent for installation of ASHP and associated equipment across two locations (The Mansion/Hut 4 and Block E) and the removal of the existing oil boilers and oil storage tanks
Granted Heritage and listed buildings 25 docs -
BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
79% historically approved · decision due ~17 Aug
Installation of ASHP and associated equipment across two locations (The Mansion/Hut 4 and Block E) and the removal of the existing oil boilers and oil storage tanks
Awaiting decision Full applications 23 docs -
THE MANSION, BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
The crown lift to 2m above ground over footpath of Cedar (T102) protected by Milton Keynes Council Tree Preservation Order no. PS/540/15/139 and the crown lift to 4m above ground along boundary by parking bays/kerbs and prune back by 2m from street lights of mixed trees in Group E protected by Milton Keynes Council Tree Preservation Order no. PS/540/15/136
Granted Trees 6 docs
Other heritage and listed building applications
In Milton Keynes
-
PLN/2026/1373 Granted
19 HIGH STREET, EMBERTON, OLNEY, MK46 5JB
Listed building consent for the proposed widening of the existing opening between the Kitchen and Informal Dining spaces, including the partial demolition of an existing wall and bulkhead
-
PLN/2026/0467 Granted
HOWE PARK HOUSE, 32 HENGISTBURY LANE, TATTENHOE, MILTON KEYNES, MK4 3AB
Listed Building Consent for the proposed erection of garden fencing (Retrospective)
-
PLN/2026/1179 Decided
442 SIMPSON, SIMPSON, MILTON KEYNES, MK6 3AD
Listed building consent for the proposed removal of rotten close boarded fence and gate to right hand side of property and replace with pre treated close boarded fence
-
PLN/2026/1368 Granted
BLETCHLEY PARK, SHERWOOD DRIVE, BLETCHLEY, MILTON KEYNES, MK3 6EB
Listed building consent for installation of ASHP and associated equipment across two locations (The Mansion/Hut 4 and Block E) and the removal of the existing oil boilers and oil storage tanks
-
PLN/2026/1701 Awaiting decision
STONEBRIDGE HOUSE FARM, NEWPORT ROAD, NEW BRADWELL, MILTON KEYNES, MK13 0DY
Listed building consent for remedial and repair work consisting of the construction of an additional brick pier, and the repair of two separate stepped diagonal cracks within the coursed rubble stone wall of the main house