Converting barns and outbuildings across the South Hams
The South Hams is full of stone barns, stables and redundant farm buildings that were never designed for people to live or work in.
Converting one is a genuinely different exercise to extending a house. There is often no damp-proof course, no foundation as we would recognise it, no services within a hundred metres, and a lane that will not take an artic.
None of that makes it a bad project. It just makes it one that has to be surveyed honestly before anyone talks about finishes.
Starting with what is actually standing
The first survey question on any outbuilding is whether the walls can take a habitable roof and floor loading. Farm buildings were often built with shallow footings and rubble cores.
Underpinning, internal frames or a new independent structure inside the shell are all normal answers. What is not normal is assuming the existing walls will simply do the job.
Damp, floors and ground moisture
Rural conversions almost always need a full ground-up floor solution:
- new insulated slab with damp-proof membrane tied to wall treatment
- breathable internal finishes where the wall is solid stone or cob
- external ground levels lowered where they sit above internal floor level
- ventilation designed in rather than added later
Getting services to the building
Power, water and drainage are frequently the largest single unknown. A trench run of a hundred metres, a private treatment plant or a new supply connection can change the viability of the whole project.
We establish these costs early because they are not the kind of thing anyone wants to find halfway through.
Lanes, plant and delivery reality
Single-track lanes around Kingsbridge, Modbury and the Dart valley limit vehicle size. We plan around smaller loads, tracked plant and agreed passing arrangements with neighbours before mobilising.
What shapes a barn conversion budget
A useful budget starts with surveys, not floor area alone. The condition of the walls, foundations and roof determines how much can stay and what needs strengthening or replacement. Structural advice, measured drawings and any further investigations help turn an outline idea into work that can be priced. Planning conditions and the required specification also affect the scope.
Services and access need their own place in the budget. Water, electricity and drainage connections may involve work beyond the building itself, while a narrow lane can change delivery sizes, plant choices and handling time. Ask for these items to be separated from the internal fit-out, with assumptions and provisional allowances clearly identified. A kitchen finish can be changed later; the route for drainage needs settling much earlier.
Converting a barn is not the same as extending a house
A barn conversion adapts an existing agricultural building for a new use, such as living accommodation. An extension adds space to an existing building. With a conversion, the starting shell may have been designed for storage or livestock rather than warmth, daylight and everyday occupation. Keeping its character while making the structure suitable is part of the design, not simply a finishing choice.
The work can include structural repairs, a suitable insulated floor, roof repairs, moisture management, new openings, services and a complete internal fit-out. The order depends on surveys and the approved design. Confirm the planning route before assuming the building can become a home: permitted development rights, where available, have conditions and limits. Building regulations must also be addressed as part of the conversion.
Recent work of this type
Questions we get asked
Do barn conversions need full planning permission?
Usually yes, and some qualify under agricultural permitted development rights instead. South Hams District Council determines it, and the route affects the design significantly.
Can the original stone walls stay exposed inside?
Sometimes, in part. Full exposure conflicts with insulation and damp control, so it is often limited to a feature area.
Is a barn conversion cheaper than a new build?
Frequently not. You inherit an existing structure's problems along with its character.
How do you deal with a track that will not take deliveries?
Smaller loads, a staging area closer to the road, and tracked plant for the final leg. It is planned before the programme is fixed.
How much does a barn conversion cost?
Cost depends on the surveyed condition, structural repairs, roof and floor work, insulation, moisture management and chosen fit-out. Service connections and rural access can also change the budget substantially. A survey-led specification and itemised quote are more useful than a price based only on the barn's size.
What is a barn conversion?
A barn conversion changes an existing agricultural building into accommodation or another suitable use. The extent of work depends on the shell's condition, structural suitability, moisture issues, services and approval requirements. It is not simply decorating an empty building: the fabric must be made suitable for its new use.
How much is a barn conversion in the UK?
There is no single UK figure that reliably prices an individual barn. Location, building size and condition, planning requirements, labour, materials, access and utility connections all affect the scope. Compare quotes against the same drawings and specification, including professional fees, approval costs, VAT treatment and allowances for hidden defects.
Before you buy or commit
Structure, ground moisture, services and access decide whether a South Hams outbuilding conversion works. Character is the easy part.