Builders in Barry
Steel beams, foundations, render and garden walls for Barry homes, most of them solid-walled terraces that need building work done their way.
- ★ 4.9 · 25+ Google reviews
- 5+ years in South Wales
- Building Regs handled
- Free site visit
Building work for Barry's houses
Barry grew almost overnight once the docks opened in 1889, and most of the town still reflects it: street after street of solid-walled Victorian and Edwardian terraces in Barry town, Cadoxton and on Barry Island, with post-war estates further up the hill and newer homes around the Waterfront. Each of those needs a slightly different approach when a wall comes out or a foundation goes in.
J&Z handles the structural and masonry side of things for Barry homeowners and landlords. Every job starts with a free site visit and a written quote, Building Regulations are dealt with for you, and nothing changes on site without your agreement first.

Structural alterations and steel beams
Wall removal from £1,500Opening up the back of a terrace into one kitchen and dining room is one of the jobs we are asked for most in Barry. The wall is propped, taken out, and replaced with a steel beam on padstones, sized by a structural engineer.
We co-ordinate the calculations, deal with building control and make good the walls and ceiling afterwards, ready for plastering and decorating.
- ✓ Load-bearing walls removed and propped
- ✓ Steel beams and padstones fitted
- ✓ Engineer's calculations arranged
- ✓ Building control inspections booked

Foundations and groundwork
£3,000 – £12,000Footings for extensions, garden rooms and walls, dug to the depth the ground and building control require. Ground near the coast and on old infill can be softer than it looks, so we check before we commit to a depth.
Drainage is planned at the same stage, so new work does not end up sitting on a wet base.
- ✓ Strip and trench foundations
- ✓ Concrete slabs and bases
- ✓ Drainage runs and soakaways
- ✓ Spoil taken away

Render repair and external walls
From £45 per m²Render on Barry houses takes salt, wind and driving rain every winter. Once it cracks or blows, water gets behind it and the damage spreads out of sight.
We hack off the failed area back to sound wall, find out why it failed, and re-render in a mix that suits what is underneath, whether that is brick, stone or blockwork.
- ✓ Blown and cracked render removed
- ✓ Patch repairs blended in
- ✓ Full re-rendering
- ✓ Cause of the damp found first

Garden and boundary walls
£150 – £350 per metreLeaning, cracked or collapsed garden walls taken down and rebuilt on a proper footing, with copings that throw water off rather than into the wall. Sound walls are repaired and repointed instead of replaced.
- ✓ Walls rebuilt on new footings
- ✓ Copings rebedded or replaced
- ✓ Piers and gate posts built
- ✓ Brick matched to the house

Repointing
£40 – £90 per m²Failed joints raked out and repointed so the wall sheds water again. Most of Barry's older houses were built in lime, and repointing them in hard cement traps moisture in the brick.
- ✓ Joints raked out to depth
- ✓ Mortar matched to the wall
- ✓ Joint profile matched to the original
For lime work, stone repair and chimney stacks, see our stone and brickwork restoration service in Barry.
Refurbishments and outbuildings
Room refurbishments
Rooms stripped back to brick, failed lintels replaced, damp dealt with at the cause and walls made ready for plaster. Common in rental houses between tenants.
Garden rooms
Garden offices and outbuildings on proper foundations, insulated and built around how you will actually use them.
Extensions
Rear, side and wraparound extensions in Barry are covered on our Barry extensions page, including planning under Welsh rules.
Building Regulations in Barry
Planning permission and Building Regulations are two different things. Plenty of jobs that need no planning at all still need Building Regulations approval: taking out a load-bearing wall, fitting a steel, underpinning, or building an extension or a garden room over a certain size.
In Barry, approval and inspections go through the Vale of Glamorgan Council's building control service. We tell you at the site visit whether your job needs it, then manage the application, book the inspections at each stage and pass you the completion certificate at the end. Keep that certificate: buyers' solicitors ask for it when you sell.
When to call a builder
Signs in the structure
- ✓ Cracks wider than a coin's thickness
- ✓ Stepped cracks through brickwork
- ✓ Doors and windows that start to stick
- ✓ Sagging above a window or door
- ✓ A garden wall that leans or bows
Signs on the outside walls
- ✓ Render that sounds hollow when tapped
- ✓ Damp patches after rain on one wall
- ✓ Mortar crumbling out of joints
- ✓ Brick faces flaking away
- ✓ Water staining under sills and gutters
Spotted one of these? Call us for a free look. We will tell you what is causing it and what the fix is likely to cost.
Building work prices in Barry
| Job | Typical price | What affects it |
|---|---|---|
| Load-bearing wall removal | £1,500 – £4,500 | Span of the opening and engineer's fees |
| Groundwork and foundations | £3,000 – £12,000 | Area, depth, ground and drainage |
| Render repair | £45 – £95 per m² | How much comes off and the finish |
| Garden or boundary wall | £150 – £350 per metre | Height, footing and copings |
| Repointing | £40 – £90 per m² | Mortar type, depth of raking and access |
| Room refurbishment | £2,500 – £8,000 per room | Structural work and damp treatment |
| Garden room or outbuilding | £15,000 – £35,000 | Size, specification and finish |
Guide prices for typical Barry homes. Every job is priced in writing after a free site visit, covering labour, materials and management.
Why Barry homeowners use J&Z for building work
Built to what the job needs
Beam sizes, foundation depths and mortar mixes are set by the building, not by what makes the quote cheapest.
Used to older houses
Solid walls, lime mortar and coastal weather are everyday work for us, so repairs do not cause new damp problems.
Building control dealt with
Applications, inspections and the completion certificate are handled for you.
No surprise costs
If something unexpected turns up, like a rotten lintel or poor ground, we stop and agree the next step with you first.
Builders in Barry: common questions
What building work do you take on in Barry?
Knocking through and steel beams, foundations and groundwork, render repairs and re-rendering, garden and boundary walls, repointing, room refurbishments and garden rooms. If the job involves masonry, concrete or the structure of the house, describe it to us and we will say straight away whether it is something we do.
Do I need Building Regulations approval to remove a wall?
If the wall is load-bearing, yes. Removing it means fitting a steel beam sized by a structural engineer, and the work has to be approved and inspected by building control. In Barry that is the Vale of Glamorgan Council. We arrange the calculations and manage the approval, inspections and sign-off.
How can I tell if a wall in my Barry house is load-bearing?
Clues include a wall that runs across the floor joists, one that sits directly above another wall on the floor below, and the spine wall that runs front to back through most terraced houses. None of these is proof. We check on site, and an engineer confirms before anything is taken out.
Why does the render keep cracking on my house near the sea?
Usually because hard cement render was put over soft brick or stone, or because water is getting in behind it from a gutter, sill or the ground. Salt and wind-driven rain on the coast make it worse. Patching the crack rarely lasts; the fix is to find where the water is coming from and use a render that suits the wall.
How much does building work cost in Barry?
As a guide, removing a load-bearing wall is £1,500 to £4,500, groundwork and foundations £3,000 to £12,000, render repair £45 to £95 per square metre, and a garden wall £150 to £350 per metre. Every job is priced in writing after a free site visit.
Which areas do you cover?
All of Barry, including Barry Island, Cadoxton, Colcot, Gibbonsdown, Highlight Park and the Waterfront, plus Sully, Rhoose, Dinas Powys, Llantwit Major and the rest of the Vale of Glamorgan.
Other J&Z services in Barry
Where our Barry builders work
Barry · Barry Island · Cadoxton · Colcot · Gibbonsdown · Highlight Park · Barry Waterfront · Sully · Rhoose · Dinas Powys · Penarth · Llantwit Major · Vale of Glamorgan
Book a free site visit
Call or send us the details through the enquiry form. We will look at the job, explain what it needs and give you a written price.
