Planning application
DM/2025/01049
Mounton House Unit 5-6 Chepstow Monmouthshire NP16 6DF
Proposal
The proposed works comprise the re-reroofing of the outbuildings south west of the main driveway (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: The proposed works to Unit 10 returns the original cart shed back into a standalone outbuilding with an ancillary use as an orangerie to Mounton House, the principal dwelling. The works comprise demolition of the recent infill extension between residential buildings Unit 9 and Unit 10, returning the building back to the original footprint and use as an outbuilding. Works to Unit 9: The proposed works to Unit 9 comprise removing the separating floor & stair from the building resulting in a more spacious 2 bedroom unit. The unsightly dormer windows will be removed from both Unit 9 & 10 creating a more attractive & authentic roof scape. Reroofing outbuildings: Replacing the failing artifical Bradstone roof tiles with natural welsh slate from the Cwt-y-bugail quarry selected for its blue-grey tones to compliment the existing buildings. The slates will be installed in random widths with diminishing courses to enhance the quality and appearance of the courtyards. This upgrading of the roofs is considered to be a significant improvement to the character of the outbuildings. Garden Restoration The proposal is the next phase of a site wide garden design by Arne Maynard Garden Design to restore the Parterre Garden and Rose Garden in a scheme befitting of Henry Avery Tipping?s original vision. The proposed landscaping includes a natural swimming pool as a focal point of the garden.
As published by the council, reference DM/2025/01049
Timeline
Dates from the published record
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8 Aug 2025
Received by Monmouthshire
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28 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Monmouthshire for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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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
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DM/2026/00526 Granted
Mounton Hous Mounton Road Chepstow Monmouthshire NP16 6DF
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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DM/2026/00493 Granted
3 Mounton House Cottages Bayfield Road Mounton Monmouthshire NP16 6LD
Removal of a Eucalyptus species. This tree is now of a large size and has become unmanageable in a small garden. The tree is next to a grade 2 listed wall.
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DM/2026/00684 Awaiting decision
Mounton House Special School Bayfield Road Mounton Monmouthshire NP16 6LA
Change of use and repurposing of former school site to a sui generis estate management facility including demolition of existing school buildings, retention and refurbishment of the former sports hall for operational storage, and erection of new welfare, office, storage and service yard buildings. Associated works include contractors yard, landscaping, biodiversity enhancements, sustainable drainage, permeable surfacing, parking and renewable energy installations
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DM/2025/01262 Granted
Mounton House Mounton Road Chepstow Monmouthshire NP16 6DF
Various trees to be worked on as outlined in the Tree Condition Report Specialists Ltd.
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DM/2025/01557 Granted
Brynderwyn Pwllmeyric Chepstow Monmouthshire NP16 6LA
Changes include: 1 - Additional information on elevations regarding the joinery. 2 - Repositioning of the West Orangery, so that it sits closer to the rear elevation of the house. 3 - Increase in orangery heights by approx. 450mm to accommodate revised roof construction. 4 - Improved window arrangement including sizing and proportions. 5 - A slight increase in the size of the roof lanterns.
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DM/2026/00910 Awaiting decision
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Replace modern render, plaster, existing fascias and soffits, Repair windows. Reduce ground levels & install French drain
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DM/2026/00816 Awaiting decision
Post Office And General Store B4347 Grosmont Bridge To Whitehouse Farm Grosmont NP7 8EP
The application seeks permission for a first-story rear extension with a gable roof, minor internal alterations and the change of use of part of the ground floor of the building in order to create two separated house