Structural Alterations
Structural Work Belfast
Structural work is the one part of a building job where the paperwork and the physical work are the same thing. CSW does it in Belfast with calculations, propping and council inspection in the right order.
The Work You Cannot Undo Cheaply
Everything else on this site can be redone. A kitchen can be ripped out, a wall can be replastered, a garden can be relaid. Structural work is different, because by the time it is wrong the building has already moved, and putting a building back is an order of magnitude harder than getting it right the first time. That is why it is the job most worth being fussy about, and the job where the cheapest quote should worry you rather than please you.
Most of what we do is straightforward in principle: removing a load bearing wall to open up a downstairs, forming a wider opening between a kitchen and a dining room, replacing a failed lintel over a window, or repairing a structure that has moved. What makes it structural work rather than building work is that the load has to be picked up, transferred and supported somewhere else, and somebody has to have calculated that rather than judged it.
The other thing that separates it is inspection. A steel over an opening is inspected before it is boxed in, because once it is plastered nobody can see the bearing, the padstone or the packing. An inspection missed at that stage is not a paperwork problem, it is a wall that may have to be opened up again.
Load Bearing Removals
Taking out an internal wall carrying floor or roof load, propping it, installing the beam and transferring the load onto sized padstones and a load path that goes all the way to the ground.
Openings And Lintels
Widening a doorway, forming a new opening in an external wall, or replacing a failed or undersized lintel over an existing window. Common on older Belfast property and often overdue.
Repair And Underpinning
Investigating movement, repairing cracked or failed masonry, and underpinning where the ground has genuinely caused a problem. Diagnosed before it is treated rather than after.
Why CSW For Structural Work
Calculations, Not Judgement
Beam sizes come from an engineer. A steel that looks about right and deflects is not a saving, it is a repair you will pay for twice.
Load Path To The Ground
A beam is only as good as what it lands on. We check what is under the padstone rather than assuming the wall below can take it.
Inspected Before It Is Hidden
The council's building control officer sees the bearing before it is boxed in. Work covered up early may have to be opened up again.
Propping Done Properly
Temporary support sized and positioned for the load, not a few acrows in the general area. The dangerous part of the job is the middle of it.
50 Years Of Combined Experience
Tradesmen who have opened up enough Belfast houses to know when a wall is doing more than the drawings suggest.
We Make Good Afterwards
Plastering, joinery and decoration by the same team, so the finished opening looks intentional rather than repaired.
Structural Work And The District Council
Structural work is the clearest case on this site for the Full Plans route and for taking inspection stages seriously. This is general guidance for Northern Ireland rather than advice about your building, and your district council's building control service is the authority on your specific job.
Full Plans, Because Somebody Has To Check The Numbers
There are two routes into building control here. A Building Notice can only be used for minor planned work to a single domestic property. Structural alteration is not that. Removing a load bearing wall or forming a substantial new opening is a Full Plans job, where drawings and calculations are submitted and assessed, and where the council can issue a Notice of Passing of Plans for the design.
The point of Full Plans on structural work is not bureaucracy, it is that a second person checks the beam size and the bearing before the wall comes out rather than after. That is worth having.
- The Notice of Passing of Plans is the document a purchaser's solicitor will look for when the house sells.
- A structural change made without it is a defect on the title as much as a defect in the building.
- Calculations from an engineer are normally required and are a small part of the total cost.
The Council Is The Only Inspector
Building control in Northern Ireland is administered by your district council under the Building Regulations (Northern Ireland) 2012. There is no private approved inspector route here, unlike England and Wales. Whichever district the property sits in, that council's building control service is the body that inspects.
For structural work the inspection sequence is the whole game. The officer needs to see the opening with the beam in place and the bearing exposed, before plasterboard, before boxing, before decoration.
- Book the inspection at the stage, not at the end of the job.
- Work concealed before inspection may have to be opened up again at your expense.
- Where the design changes on site, the approved drawings change too. It is not an informal decision.
Shared Walls, With No Statute Behind You
This matters more on structural work than on anything else, and it is where English guidance misleads people most badly. The Party Wall etc. Act 1996 does not extend to Northern Ireland. There is no statutory notice to serve on a neighbour before working on a shared wall, no statutory timetable and no surveyor's award to resolve a dispute.
On a Belfast terrace or semi, where the wall you are altering is very often shared, that means there is no statutory protection in either direction. If cracking appears next door after your work, the question is what the deeds say and what you can prove about the condition beforehand.
- Speak to the neighbour before the propping goes in, not after they hear it.
- Take a dated photographic record of their side, ceilings and any existing cracking, before you start. It is the substitute for the English schedule of condition.
- Where a wall is genuinely shared, the deeds carry the weight that statute carries across the water.
How Structural Work Is Actually Done
Working Out What The Wall Is Doing
Before anything is designed, somebody has to establish what the wall carries. Floor joists spanning onto it, a roof structure landing on it, or nothing at all beyond its own weight. On older Belfast houses that has often changed since the house was built, because a previous owner altered something and the load found a new path.
We open up enough to see it rather than reading it off the original layout. That is a morning's work and it is the difference between a beam sized for the actual load and a beam sized for an assumption.
Propping And The Dangerous Middle
Temporary support is the part of the job with the real risk in it, because for a period the building is being held up by something temporary. Needles through the wall, props sized and positioned for the load, and a bearing under each prop that can take it, right down through any suspended floor.
A prop standing on a floorboard is not support, it is decoration. We check what is under the prop as carefully as we check what is under the finished beam.
Beam, Padstones And Load Path
The beam comes in, sits on padstones sized by the calculation, and is packed and pinned so the load transfers properly rather than settling onto it over the following weeks. A gap between the top of a steel and the masonry above it means the wall moves before it bears.
Then the question everybody forgets: what is under the padstone. The load has to go all the way to the ground. If the masonry beneath the bearing is a half brick pier or a stud wall, the beam is fine and the building is not.
Diagnosing Movement Before Treating It
Cracks are symptoms. Before anyone underpins anything, the cause has to be understood, because underpinning a building that is moving because of a leaking drain or a nearby tree fixes nothing and costs a great deal.
We would rather spend time working out whether a crack is historic and stable, seasonal clay movement, drainage related or genuine subsidence, than sell an expensive treatment for the wrong problem. Sometimes the honest answer is monitoring rather than intervention.
How A Structural Job Runs
Open Up And Establish The Load
We look at what the wall is actually carrying rather than what the original layout suggests. Previous alterations often moved the load somewhere unexpected.
Engineer's Calculations
Beam size, bearing and padstone dimensions calculated rather than judged. It is a small cost against the price of a beam that deflects.
Full Plans Application
Drawings and calculations to the district council for assessment, aiming for a Notice of Passing of Plans before the wall comes out.
Neighbour And Record
Where a shared wall is involved, a conversation with the neighbour and a dated photographic record of their side. There is no statute here to fall back on.
Prop, Cut, Install
Temporary support sized for the load, wall removed, beam set on padstones, packed and pinned so the load transfers immediately rather than gradually.
Inspect, Then Close In
Building control sees the bearing before anything covers it. Only then does the boxing, plastering and making good happen.
Frequently Asked Questions
Do I need building control approval to remove a load bearing wall?
Yes, and it should be a Full Plans application rather than a Building Notice. A Building Notice can only be used for minor planned work to a single domestic property, and structural alteration is not that. Full Plans means the drawings and calculations are assessed before the wall comes out, and the council can issue a Notice of Passing of Plans.
Can I use a private structural inspector like in England?
No. There is no private approved inspector route in Northern Ireland. Building control is administered by your district council under the Building Regulations (Northern Ireland) 2012, so whichever district the house sits in, that council's building control service is the body that assesses and inspects. English guidance on appointing an inspector does not apply.
How do you know if a wall is load bearing?
By opening up enough to see, rather than reading it off the original layout. On older Belfast houses the load path has often changed because a previous owner altered something. A morning spent establishing what the wall actually carries is the difference between a beam sized for the real load and one sized for a guess.
Do I have to tell my neighbour before working on a shared wall?
There is no legal requirement, because the Party Wall etc. Act 1996 does not extend to Northern Ireland. There is no notice, no timetable and no surveyor's award. That also means no statutory protection either way, so we strongly recommend speaking to them beforehand and taking a dated photographic record of their side and any existing cracking.
What happens if the work gets covered up before it is inspected?
It may have to be opened up again at your cost. The building control officer needs to see the beam in place with the bearing exposed, before boxing, plasterboard or decoration. Booking the inspection when the work reaches the stage, rather than when the job is finished, is the single most useful thing a homeowner can insist on.
Why does the padstone matter so much?
Because the beam is only as good as what it lands on, and the load has to travel all the way to the ground. A correctly sized steel bearing onto a half brick pier or a stud wall is a beam that is fine and a building that is not. We check what is beneath the bearing, not just the bearing itself.
Is propping really that big a deal?
It is the part of the job with the actual risk in it, because for a period the building is being held up by something temporary. Props need to be sized and positioned for the load, with a bearing under each one that can take it, right down through any suspended floor. A prop standing on a floorboard is not support.
I have cracks. Do I need underpinning?
Probably not, and nobody should tell you that you do before diagnosing the cause. Cracks are symptoms. Historic and stable movement, seasonal clay movement, a leaking drain and genuine subsidence all look similar and need completely different responses. Underpinning a building that is moving because of a drain fixes nothing and costs a great deal.
Why is the cheapest structural quote a warning sign?
Because the savings usually come out of the parts you cannot see afterwards: the engineer's calculation, the propping, the padstone size, the load path below the bearing and the inspection. Everything else on a building job can be redone. Structural work that is wrong means the building has already moved, and putting a building back is far harder.
Will the finished opening look like it was always there?
That is the aim, and it is why having the plastering, joinery and decoration done by the same firm helps. A structural opening finished by a different trade weeks later tends to read as a repair. Making good properly, with the right reveals and trim, is what makes it look intentional.
More Building & Construction From CSW
Get Your Free Quote Today!
If you are thinking about opening up a downstairs, or you have cracking you are worried about, get us out to look before you commit to anything. We will tell you what we think is happening and what it would take. No charge for the visit.
- Call us: 07703 433214
- Email: Cswbuild@gmail.com
- Location: Belfast, Northern Ireland