What is a structural alteration?
A structural alteration changes how a house carries its loads, most often by removing a load-bearing wall and replacing it with a steel beam. It is how kitchens and dining rooms become open-plan, and how extensions are joined to the original house.
How much does a structural alteration cost in County Armagh?
In County Armagh, a structural alteration typically costs £3,750–£8,250 for a typical knock-through with steel beam, including VAT at 20% (standard rate). Building costs in Northern Ireland run about 14% below the UK average, and the figures for County Armagh are adjusted to reflect that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A typical knock-through with steel beam | £3,750–£8,250 |
| Higher specification | £8,250–£10,500 |
The main things that change the cost:
- What sits above the wall
- Agreements with neighbours on shared walls
- Span of the opening
- Floor and ceiling repairs
For a figure based on your own measurements, try the guide price tool, then book a free home visit for a fixed quote.
Do you need planning permission for a structural alteration in County Armagh?
Before anything is built in County Armagh, we confirm which approvals apply in Northern Ireland. In Northern Ireland removing a load-bearing wall needs building control approval from the council.
In Northern Ireland building control approval comes from the council, usually through a full plans application or a building notice, with inspections during the work and a completion certificate at the end.
If the answer is not clear-cut, we can apply for formal confirmation before you commit to the build.
What we handle
What we take care of:
- Making good, plastering and flooring repairs
- Building control application
- Building control sign-off
- Written agreement with neighbours on shared walls
- Fire protection to the steel
- Steel beam supply and installation on padstones
How long does it take?
Expect 1 to 2 weeks on site for a typical knock-through. Before that, surveys, drawings and approvals usually take 6 to 12 weeks, longer if the council asks for changes.
Building in County Armagh
Northern Ireland has many detached and semi-detached homes on generous plots, which suits single-storey rear extensions and garage conversions.
Towns we cover in County Armagh include Craigavon, Portadown and Armagh.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions about structural alterations in County Armagh
Can the beam be hidden?
Often, by setting it within the ceiling depth. It depends on the joists and span.
How long does a knock-through take?
Usually 1 to 2 weeks on site, plus a few days for plastering to dry.
Do I need building regulations approval?
Yes. Removing a load-bearing wall is building work that needs approval, with calculations for the beam.
Do you build structural alterations in County Armagh?
Yes. We build structural alterations across County Armagh, including postcodes BT35, BT60, BT61, BT62 and BT63. Every project starts with a free home visit.
How much does a structural alteration cost in County Armagh?
In County Armagh, a structural alteration typically costs £3,750–£8,250 for a typical knock-through with steel beam, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
Do I need planning permission for a structural alteration in County Armagh?
In Northern Ireland removing a load-bearing wall needs building control approval from the council.