On this page
- How we convert stone garages and outbuildings in Hexham
- Who is a Hexham outbuilding conversion for?
- Designations we confirm before any drawing
- Rebuilding the old door opening in stone
- Can thick stone walls make a warm, dry room?
- Running services down a long garden
- Starting a quote for your Hexham building
How we convert stone garages and outbuildings in Hexham
Much of the work around Hexham involves stone: a detached garage at the end of a long garden, a former coach house, or an outbuilding that has spent decades as a store. Convert Garages turns these into home offices, annexes with a bedroom, shower room and kitchenette, and part-conversions where one end stays as a log store, workshop or storage space. An attached garage that opens off the house can become living space or a gym. Each can be a full or partial conversion.
Buildings like these shape the way the service is delivered. We begin by assessing the walls, roof, floor and door opening, and how far the building sits from the house. The layout is then planned around how the room will be used, whether that is a desk facing the window or a level route to a shower room. Heritage designations, planning and building regulations requirements are settled before work starts, along with who is responsible for the drawings, applications and inspections. The specification and quotation include the materials for the new frontage, so you can see exactly what is covered. Construction follows an agreed sequence, and handover includes the building control completion.
You can expect a clear quote, responsibilities and the order of work settled up front, and any change discussed with you before it is made. At handover the finished room is checked with you.
Who is a Hexham outbuilding conversion for?
It suits owners of older stone houses near the centre of Hexham, and of larger plots towards the edge of town or out in the villages, where a detached building sits well away from the house. Some work from home several days a week and want an office that is not the spare bedroom. Others want a parent nearby without moving them into the main house. Others simply want an unused building to earn its keep.
Designations we confirm before any drawing
The historic centre of Hexham is a conservation area, and many buildings in and around it are listed. Before a layout is drawn, Convert Garages establishes whether your property falls inside the boundary and whether the house or the garage is listed. An outbuilding within the grounds of a listed house may be covered by that listing even when it is not named in it.
Northumberland County Council is the local planning authority. Internal conversion work that does not enlarge the building does not usually need planning permission. In a conservation area, though, replacing a garage door with a wall and window can need consent, and for a listed building almost any alteration needs listed building consent. Removed permitted development rights or an Article 4 direction can also bring the work into the planning system. Building regulations approval is normally needed for any conversion to habitable space, through the council's building control service or a registered building control approver. Our planning and building regulations guide explains how the two fit together.
Rebuilding the old door opening in stone
Where an application is needed in central Hexham, the council will look closely at materials and design. Even where one is not, a poor match spoils a good building. Take a wide timber door out of a stone wall and whatever goes back has to look as if it belongs. The usual approach is to build up the lower part of the opening in stone and set a window above it, or to fit glazed doors that keep the shape of the original opening. Reclaimed stone that matches the colour and coursing of the existing walls tends to blend in far better than new stone, and lime mortar often suits older walls because it lets them breathe.

Proportion matters as much as material. A tall, narrow timber window usually sits better in a stone elevation than a wide modern one, and the head and sill details should echo those already on the house.
Roof work from the inside
Many detached stone garages around Hexham have slate or stone roofs. Insulation normally goes between and under the rafters, so the outside stays as it is. We check the slates, ridge and gutters at the assessment, since a leak found after the room is finished costs far more to put right.
Can thick stone walls make a warm, dry room?
Yes, with the right approach. Solid stone does not behave like a modern cavity wall, and sealing it in with the wrong materials can trap moisture. A breathable insulation system on the inside, a new insulated floor with a damp-proof membrane and good ventilation are the usual ingredients, and they are written into the specification so you can see what is being used where. If that is how you want an old building handled, ask Convert Garages for a quote.
Running services down a long garden
On larger Hexham plots, a detached building some way from the house needs every service brought to it, usually in a single trench:
- Power: an armoured cable from the consumer unit, sized for heating as well as lighting and sockets.
- Water: a supply pipe laid deep enough to be protected from frost.
- Drainage: a connection to the existing drains, or on some rural plots a private system. A building lower than the house may need a pump.
- Data: a cable or duct in the same trench, far more reliable than wi-fi through thick stone.
If the property uses a septic tank or treatment plant rather than mains drainage, tell us early, because a new bathroom affects it.
Starting a quote for your Hexham building
These details make the first conversation much more useful:
- your postcode, and whether you know the property is listed or in the conservation area
- photos of the outside, including the door opening, roof and nearby windows on the house
- photos inside showing the walls, floor and roof structure
- rough measurements and the distance from the house
- whether the property has mains drainage
The garage conversion cost guide explains what pushes the price up or down. Further east, see our Morpeth page, or the full list of areas we serve.

