Steel BeamInstallers
Victorian through-lounge with a boxed beam where the dividing wall used to be

Through-lounge knock-throughs · Newtownabbey

Through-lounge knock-throughs in Newtownabbey

Through-lounge knock-throughs for homes in BT36, BT37, designed by a structural engineer.

  • Itemised written quote
  • Beam sized by a structural engineer
  • Covering Newtownabbey and nearby

Free survey in Newtownabbey

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  • Free survey visit
  • Engineer's calculations arranged
  • Building control handled
  • Fixed written price once scope is agreed
  • England, Wales, mainland Scotland & NI

Through-lounge knock-throughs in Newtownabbey: how it works

Need through-lounge knock-throughs in Newtownabbey? We also cover the surrounding towns and villages in Antrim and Newtownabbey. We survey the property, arrange the engineer's design, deal with Antrim and Newtownabbey Borough Council, fit the steel and make good, all under one quote for BT36 and BT37 addresses.

Many period terraces and semis were built with a front parlour and a back sitting room divided by a solid brick wall. Opening them into one through-lounge brings light from both ends of the house, but that wall commonly carries the floor joists, the wall between the bedrooms above and sometimes part of the roof load too.

Key points for your project

  • Radiators, pipe runs and sockets on the dividing wall need relocating. Older houses sometimes have heating pipes running under the floor along the wall line, so these are traced and moved by a heating engineer before the wall comes down.
  • Victorian brickwork is usually laid in soft lime mortar and the internal walls may be only one brick thick. The engineer allows for this when designing the bearings, and padstones are often used to spread the beam's load over the weaker masonry.
  • Minor hairline cracks can appear in plaster upstairs as the structure takes up the new support. This is common after a knock-through and is usually filled at decoration stage, but wider or growing cracks should be reported so they can be checked.
  • The structural stage for a through-lounge typically takes three to five working days. Both reception rooms are out of use for that time, so furniture is moved out or stacked and sheeted, and the hallway is kept clear as the main walkway.
  • Period ceilings are often lath and plaster, which can crack or sag when the wall below is disturbed. Props are set to spread load gently, and damaged areas are repaired with lime plaster or overboarded, depending on the condition and your preference.

Four stages, one team

  1. Free visit

    A short visit to Newtownabbey to see the job, agree what you want and check the bearings, floors and services that affect the design.

  2. Calculations

    The engineer's calculations and a simple drawing are prepared for your opening and shared with you before anything is ordered.

  3. Building control

    A full plans application or building notice goes to Antrim and Newtownabbey Borough Council under the Building Regulations (Northern Ireland) 2012 before work begins.

  4. Steel in, made good

    On site we prop, open up, fit and pack the steel, then fire protect, box in and plaster once the inspection is done.

Guide prices for through-lounge knock-throughs in Newtownabbey

As a guide, budget £2,150–£4,750 including VAT for through-lounge knock-through in Newtownabbey, based on published UK cost guides adjusted for prices in Northern Ireland (-14%).

JobTypical guide rangeWhat it usually covers
Through-lounge knock-through£2,150–£4,750Wall between front and back reception rooms, steel beam, approvals, plastering and floor infill
Chimney breast removal (ground floor)£1,300–£2,600Ground-floor breast removed, steel to support the breast above, building control and making good
Kitchen-diner knock-through£2,150–£5,150Internal structural wall between kitchen and dining room, steel beam, approvals and making good (kitchen fitting extra)
Temporary works and propping£130–£430Props, spreaders, needles and sole plates for a typical opening, installed and struck

Figures include our approximate regional adjustment for prices in Northern Ireland (-14%) and are rounded. How these figures are worked out.

Building rules for Newtownabbey

In Northern Ireland, structural work comes under the Building Regulations (Northern Ireland) 2012 and is approved by the local council's building control. For Newtownabbey that is Antrim and Newtownabbey Borough Council. We submit a full plans application or building notice before work starts and book the inspections.

The Party Wall etc. Act does not extend to Northern Ireland. Shared walls are dealt with under your title and the general law, so we recommend agreeing access and the work with your neighbour before it starts.

Building rules in Northern Ireland

Through-lounge knock-throughs near Newtownabbey

Questions about through-lounge knock-throughs in Newtownabbey

How soon can through-lounge knock-throughs start in Newtownabbey?

Start dates depend on the engineer's calculations, the building control approval and any agreement needed with neighbours. We give you a realistic timetable after the survey and keep you updated as each approval comes through.

Do you also work near Newtownabbey?

Yes. We also cover nearby towns including Carrickfergus, Castlereagh, Lisburn and Antrim.

Is the wall between two reception rooms load-bearing?

In most period terraces and semis it is, because it carries the floor joists and the wall between the bedrooms above. Some later houses have lighter partitions in this position, so the only way to be sure is an engineer's inspection. We arrange this during the survey and design stage.

What happens to the floor where the wall was?

A strip of exposed joists, or a footing in a solid floor, is left where the wall stood. Timber floors are patched with matching or reclaimed boards, and solid floors are filled and levelled. If you are fitting a new floor across both rooms, it is simply prepared level for the new finish.

Can I keep the cornicing when the wall comes down?

Usually yes. The existing cornice in each room is protected during the work, and a matching profile can be run or cast to bridge the opening once the beam is boxed and plastered. How closely it matches depends on the original design and its condition, which we check at the survey visit.

How much do through-lounge knock-throughs cost in Newtownabbey?

As a guide, budget £2,150–£4,750 including VAT for through-lounge knock-through in Newtownabbey, based on published UK cost guides adjusted for prices in Northern Ireland (-14%). The exact figure depends on the span, what the wall carries, access and the finish, and is fixed in writing once the scope is agreed.

Planning to take a wall out?

Book a free survey visit. You get an itemised written quote covering calculations, building control, steel and making good.