Based in Torquay · Building across South Devon

JB Carpentry & Building
Stock photograph of a converted stone barn with a tiled roof

Barn conversionsin Torquay & surrounding areas

Turn a redundant agricultural building into a sound, liveable home. We handle the structural repair, groundworks and shell so the character survives and the building lasts.

Converting a barn without losing what makes it special

A barn conversion turns an agricultural or traditional building (a stone barn, linhay, cart shed or outbuilding) into a home, holiday let or annexe. South Devon and the South Hams have hundreds of these buildings, and a good conversion is one of the most rewarding builds there is.

Our barn conversions are for owners who have their plans and consents in place and need a contractor that understands old structures. Traditional buildings were never designed for modern loads, insulation or living, so the work is mainly structural.

You'll need professional help as soon as the building has to carry new floors, a new roof or new openings. Walls may lack proper foundations, roof timbers may be decayed, and stonework may need rebuilding before anything else can happen.

We complete conversions of agricultural and traditional buildings from groundworks through to the structural shell. Groundworks, masonry and structural carpentry are done by our in-house team, and specialist trades are brought in through the company when the shell is ready.

The risks hidden in an old building

Barns look solid, but most of the risk sits in the parts you can't see until the work starts.

Shallow or missing foundations

Many traditional barns sit on shallow footings. Adding loads without addressing them can cause settlement and cracking in walls you're trying to save.

Decayed timbers

Roof trusses, purlins and lintels may be rotten or damaged by insects. Leaving them in place risks sagging roofs and failed openings.

Damp in solid walls

Solid stone walls need careful detailing so moisture can escape. The wrong approach traps water and damages both the walls and the new interior.

Budget surprises

Without an experienced structural survey of the work, hidden defects turn into expensive variations halfway through.

Common mistakes to avoid

  • Treating a barn conversion like a new build and budgeting accordingly.
  • Removing original fabric that the consent requires you to keep.
  • Leaving structural repairs until after the internal layout is fixed.
  • Hiring a fit-out team before the structure has been made sound.

Our barn conversions process

  1. Step 1

    Send your plans

    Share your approved drawings and any structural calculations. We'll arrange a free site visit.

  2. Step 2

    Clear written price

    You get a written quote for the work, with any fit-out priced separately if you want it.

  3. Step 3

    Structural repair and shell

    We carry out the groundworks, strengthen or underpin walls where needed, rebuild masonry, replace structural timbers and form new openings to create a sound, weathertight shell.

  4. Step 4

    Building Control liaison

    We can liaise directly with Building Control officers on site where inspections are required.

  5. Step 5

    Completion and guarantee

    We hand over the finished work, covered by our 1-year indemnity-backed workmanship guarantee.

What you get with JB Carpentry and Building

Structure first

Our focus is the ground and the structure, the stages that decide whether a conversion lasts.

Groundworks to roof

Foundations, drainage, masonry and roof structure are handled by our in-house team.

Engineer-led decisions

We work with your architect and structural engineer so repairs are specified, not guessed.

Building Control on site

We liaise directly with Building Control officers through each stage.

Flexible handover

We can manage the fit-out or hand the shell to your own trades.

Guaranteed workmanship

A 1-year indemnity-backed workmanship guarantee covers completed work.

Barn conversion structure in detail

Traditional buildings need a different approach to new builds. These are the structural areas that come up most often.

Foundations and underpinning

Where existing walls have inadequate foundations, underpinning or new internal foundations may be needed to carry new floors and loads. This is often specified by the structural engineer after trial holes.

Stonework and masonry

Devon barns are commonly built in local stone, cob or brick. Repairs may include rebuilding sections of wall, repointing, forming new openings with proper lintels and tying walls together where they've moved.

Roof structure

Existing roof timbers are assessed, repaired or replaced, and the roof built up to take insulation and a new covering. Steel or timber frames may be introduced to support upper floors without overloading old walls.

Ground floors and drainage

Earth or concrete barn floors are usually dug out and replaced with an insulated, damp-proofed floor. New drainage, including septic tanks on rural sites without mains sewers, is planned at the same stage.

Homes, holiday lets and annexes

The structural principles are the same whether the barn becomes a family home, a holiday let or an annexe, though the layout and Building Regulations requirements can differ. Your architect's drawings set out which apply.

Related services

Based at 156 Newton Road, Torquay, Devon. Barn Conversions across Torquay, Paignton, Totnes, Dartmouth, Kingsbridge, Salcombe, South Hams, Teignbridge.

Planning your barn conversions project

Start with approved drawings

We work primarily from existing client plans, so the best time to contact us about barn conversions is once your architect's drawings and any planning consent are in place. Drawings fix the size, layout and specification, which helps us define the scope of the quote; any assumptions or changes should be agreed for your project. If your engineer has produced structural calculations, include them too; they set the foundation sizes, steel sections and fixings we'll build to.

Working with your architect and engineer

We regularly work alongside client architects and structural engineers. When a question comes up on site (an unexpected drain, softer ground than expected, or an existing wall that isn't what the drawings assumed), we can discuss it with your designer before proceeding and agree any necessary changes.

Building Control from first dig to sign-off

Most structural work needs Building Regulations approval and inspections at key stages, such as foundation excavations, damp-proof courses, drainage and structural elements before they're covered. We liaise directly with Building Control officers on site throughout the build, where required; inspection timing and approval depend on the relevant Building Control body.

Shell handover or full finish

Our core strength is the ground, the structure and the watertight shell. Once that's complete you have a choice: we can price and manage the internal fit-out (kitchens, bathrooms, doors, decorating) through our vetted specialist trades, or we can hand over at the shell stage so you can bring in your own finishing trades and control that part of the budget yourself. Either way, the structure your finishes sit on has been built by one accountable team.

Building in South Devon conditions

Site conditions vary across South Devon. Sloping plots, restricted access, existing drains, coastal exposure and older structures may affect your barn conversions project. Your architect or engineer can specify the measures required, and we can discuss the site conditions and agreed scope when preparing a quote.

What happens after you get in touch

Call Jake or send your drawings through the contact page. We'll look over the plans, arrange a free site visit at a time that suits you, Monday to Saturday, and walk the site with you to understand access, ground conditions and how you want the project finished. You'll then receive a clear, written quote setting out what's included, so you can compare it properly and decide with confidence.

One team, managed start to finish

A core in-house team of six handles groundworks, brickwork, blockwork and structural carpentry, growing to as many as 15 with long-standing subcontractors on larger projects. Director Jake Brown brings 18 years of hands-on trade experience and the company has been trading across South Devon for over 11 years. You get one point of contact, clear communication and strict quality control on every stage.

Want to know more about the team? Read about us or go back to the homepage.

Barn Conversions questions

Costs vary widely with the condition of the building, the amount of structural repair and the level of finish. A free site visit and written quote based on your drawings is the most reliable starting point.

Timescales depend on the size of the building and what the structure needs. We'll give you a realistic programme once we've seen the drawings and the barn.

If there is no mains sewer connection, a drainage designer should confirm whether a septic tank or another system is suitable. We offer septic tank installation, including ground preparation and excavation, alongside conversions.

We work on traditional agricultural buildings. Any listed-building consent conditions are set out in your approved drawings, and we build to them.

Your architectural drawings, any planning or Building Regulations approvals, and structural calculations if your engineer has produced them. Photos of the site help too. We'll then arrange a free site visit.

We do. Plumbing, electrical, plastering and specialist finishing trades are delivered by vetted subcontractors who work through the company, so you deal with one contractor rather than several.

Yes. Initial site visits and quotes are free. Send your drawings, we'll look at the site with you and give you a written price for the work.

All completed work is covered by a 1-year indemnity-backed workmanship guarantee, and the company holds business and public liability insurance.

We're based on Newton Road in Torquay and work across South Devon, including Paignton, Totnes, Dartmouth, Kingsbridge, Salcombe, the South Hams and Teignbridge.

We work Monday to Saturday, 6:30am to 6:00pm. Contact Jake to discuss your project and availability. If a structure appears unsafe, seek urgent advice from a qualified structural engineer or the appropriate emergency service.

Got your plans?Get a clear price.

Free site visit and a written quote. Director Jake Brown brings 18 years of trade experience. All completed work carries a 1-year indemnity-backed workmanship guarantee.