Planning application
Mounton House Unit 5-6 Chepstow Monmouthshire NP16 6DF
Works: Extension Loft or dormer Roofing Demolition
Permission granted. Work must normally begin within five years of the decision or the permission lapses.
Proposal
Re-reroofing outbuildings, partial demolition and internal alterations, and garden restoration, including a natural swimming pool. Including demolition of recent extension, removal of dormers, reinstating Welsh slate roof, restoration of Parterre Garden and Rose Garden to reflect Henry Avery Tipping's original vision.
As published by the council, reference DM/2025/01049
Application record
- Reference
- DM/2025/01049
- Type
- Listed Building Consent Heritage
- Status
- Decided
- Decision
- Granted As published: Approve
- Received
- 8 Aug 2025
- Validated
- 28 Aug 2025
- Decided
- 2 Apr 2026
- Ward
- Shirenewton
- Parish
- Mathern Community Council
- Decision by
- Delegated Officer
- Postcode
- NP16 6DF
Site history
Applications at this address on the Monmouthshire register
This site has had 2 applications since 2025: 2 approved, 0 refused.
-
DM/2025/01048 Granted
Mounton House Unit 5-6 Chepstow Monmouthshire NP16 6DF
Re-reroofing of the outbuildings (units 5-10), the partial demolition and internal alteration to units 9 & 10, and alterations to the garden, including a natural swimming pool. Works to Unit 10: Returns the cart shed back into a standalone outbuilding with an ancillary use as an orangerie. to Mounton House, the principal dwelling, demolition of the recent infill extension between residential buildings Unit 9 and Unit 10. Works to Unit 9: Removing the separating floor & stair dormer windows will be removed from both Unit 9 & 10 Reroofing outbuildings: Garden Restoration
Timeline
Dates from the published record
-
8 Aug 2025
Received by Monmouthshire
-
28 Aug 2025
Validated
Checked as complete and ready for consideration.
-
2 Apr 2026
Decision issued: Approve
-
28 Jul 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
- Application: DM/2025/01048 (Decided)
Documents
Plans, drawings, consultee responses and the officer's report
97 documents on file for this application
- LISTED BUILDING CONSENT APPROVAL DECISON
- MCC BIODIVERSITY
- HOLDING OBJECTION - BIODIVERSITY
- PROPOSED ROOF PLAN 5 & 6
- EXISTING FIRST FLOOR PLAN
- MOUNTON HOUSE OUTBUILDINGS CATALOGUE OF PHOTO
- BIODIVERSITY ENHANCEMENT STRATEGY
- PRECAUTIONARY WORKING METHOD STATEMENT
- COMMENTS - CADW
- OUTBUILDINGS - CATALOGUE OF PHOTOS
- DC_2007_00798 - EXISTING FIRST FLOOR PLAN
- PROPOSED ROOF PLAN 5 & 6
- BIODIVERSITY ENHANCEMENT STRATEGY
- GREEN INFRASTRUCTURE STATEMENT
- MOUNTON HOUSE ESTATE TREES 1
- MOUNTON HOUSE ESTATE TREES 2
- WELSH HISTORIC GARDENS TRUST
- MCC ECOLOGY COMMENT
- ORANGERIE DOOR DETAILS
- MATERIALS SPECIFICATION
- ELEVATIONS 2 UNITS 9 &110
- UNITS 9 & 10 WINDOW AND DOOR DETAILS
- TREE OFFICER COMMENT
- TRUST FOR WELSH ARCHAEOLOGY
- HISTORIC BUILDINGS & PLACES
- COMMENTS - WELSH WATER
- COMMENTS - MATHERN CC
- ONR LAND USE PLANNING
- COMMENTS - NATIONAL AMENITY SOCIETY
- COMMENTS - NATIONAL AMENITY SOCIETY
- BIODIVERSITY ENHANCEMENT STRATEGY
- DESIGN AND ACCESS STATEMENT
- DRAWING REGISTER & ISSUE SHEET
- PROPOSED SITE ROOF PLAN
- PROPOSED SITE LOCATION PLAN
- SITE LOCATION PLAN EXISTING
- EXISTING SITE ROOF PLAN
- MASTERPLAN PLANTING PLAN
- PROPOSED SITE PLAN
- EXISTING SITE SECTION
- EXISTING SECTIONS 2
- PROPOSED 1F PLAN
- PROPOSED SITE ROOF PLAN
- DRAWING ISSUE SHEET
- EXISTING GROUND FLOOR PLAN
- EXISTING ELEVATIONS 2
- SITE ROOF PLAN
- PROPOSED DETAILS
- PROPOSED SITE SECTION
- PROPOSED ELEVATIONS E5 - UNIT 9 S.EAST / ORCHARD COURTYARD ELEVATION
- PROPOSED GROUND FLOOR PLAN
- PROPOSED ROOF PLAN
- PROPOSED SECTIONS 2
- EXISTING ELEVATIONS 1
- EXISTING SITE PLAN
- MOUNTON HERITAGE IMPACT
- PROPOSED ELEVATIONS 7
- PROPOSED ROOF PLAN UNIT 5 AND 6
- APPLICATIONFORMREDACTED
- EXISTING GROUND FLOOR PLAN
- EXISTING 1F PLAN
- EXISTING ROOF PLAN
- EXISTING ELEVATIONS 1
- EXISTING ELEVATIONS 2
- EXISTING SECTIONS 1
- EXISTING SECTIONS 2
- EXISTING SITE PLAN
- EXISTING SITE SECTION
- PROPOSED SITE LOCATION PLAN
- PROPOSED GROUND FLOOR PLAN
- PROPOSED 1F PLAN
- AMGD673-MOUNTONHOUSE-GARDENS-DESIGNSTATEMENT-1 OF 3
- AMGD673-MOUNTONHOUSE-GARDENS-DESIGNSTATEMENT-2 OF 3
- AMGD673-MOUNTONHOUSE-GARDENS-DESIGNSTATEMENT-3 OF 3
- IMPACT STATEMENT 1 OF 2
- HERITAGE IMPACT STATEMENT 2 OF 2
- 2415 DRAWING ISSUE SHEET
- PROPOSED ROOF PLAN UNIT 7 AND 8
- PROPOSED ROOF PLAN
- PROPOSED ELEVATIONS 1
- PROPOSED ELEVATIONS 2
- PROPOSED SECTIONS 1
- PROPOSED SECTIONS 2
- PROPOSED DETAILS 1
- PROPOSED DETAILS 2
- PROPOSED SITE PLAN
- PROPOSED SITE SECTION
- PROPOSED ELEVATIONS 3
- EXISTING ELEVATIONS 4
- EXISTING ELEVATIONS 5
- EXISTING ELEVATIONS 6
- EXISTING ELEVATIONS 7
- EXISTING ROOF PLAN UNIT 5 AND 6
- EXISTING ROOF PLAN UNIT 7 AND 8
- PROPOSED ELEVATIONS 4
- PROPOSED ELEVATIONS 5
- PROPOSED ELEVATIONS 6
Watch members (£5 a month) open the document list from here.
Open the documentsWhat this grant of permission means
Monmouthshire granted permission on 2 April 2026, subject to any conditions on the decision notice. Work must normally begin within five 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.
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Re-reroofing of the outbuildings (units 5-10), the partial demolition and internal alteration to units 9 & 10, and alterations to the garden, including a natural swimming pool. Works to Unit 10: Returns the cart shed back into a standalone outbuilding with an ancillary use as an orangerie. to Mounton House, the principal dwelling, demolition of the recent infill extension between residential buildings Unit 9 and Unit 10. Works to Unit 9: Removing the separating floor & stair dormer windows will be removed from both Unit 9 & 10 Reroofing outbuildings: Garden Restoration
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Condition 03 Roof Materials The roof will be finished in Blue Grey Cwt-y-Bugail Celtic Grade 9mm Welsh Slate, laid in a random width, diminishing coursed pattern. Installation will be undertaken in accordance with Welsh Slate guidance for random diminishing course slating, ensuring the following: * Random widths and diminishing courses will be used, with slates positioned to achieve a consistent visual reduction across each roof slope. * Vertical joints will be staggered; no central alignment is required due to the use of random widths. * Slates will be graded by length, width, and thickness to ensure consistent coursing and visual finish. * Slates will be fixed using a traditional nail-hung fixing method. Condition 04 Rainwater Goods The proposed rainwater goods comprise Guttercrest Moulded Ogee 150 x 100 gutters and 100 x 100 Georgian square downpipes, finished in Heritage Black to match the wider estate. The system has been selected to provide a durable, traditional appearance appropriate to the listed building, to provide visual consistency with the surrounding structures. Condition 05 Timber Cladding The proposed timber cladding will be finished in Remmers Black (RAL 9004) to match the existing panelling on the estate Boards will be nominal 70mm wide, arranged in a gridded panel layout to match the existing with equal spacing and alignment to ensure a high-quality finish appropriate to the character of the building (See Drawing 2415 PC01). Fixings will comprise pairs of lost head (lost pin) nails in Grade 316 stainless steel, fixed at both ends of each timber board (to match existing). All fixings will be carefully set out to ensure uniform alignment and a discreet appearance, preserving the visual integrity of the cladding. Condition 06 ? Cart Shed Sliding Doors The proposed sliding doors will be Minima Sliding system finished in Jet Black Matt (RAL 9005). The system is specified with a 20mm minimal frame detail, designed to emphasise the original oa
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