Rear extension steels · Stockton-on-Tees
Rear extension steels in Stockton-on-Tees
Rear extension steels for homes in TS17, TS18, TS19, designed by a structural engineer.
- Itemised written quote
- Beam sized by a structural engineer
- Covering Stockton-on-Tees and nearby
- Free survey visit
- Engineer's calculations arranged
- Building control handled
- Fixed written price once scope is agreed
- England, Wales, mainland Scotland & NI
Planning rear extension steels in Stockton-on-Tees
We cover rear extension steels in Stockton-on-Tees (TS17, TS18, TS19) and the streets around it. We also work in nearby Middlesbrough, roughly 3.4 miles away. Each job is designed by a structural engineer and approved through Stockton-on-Tees Borough Council before work begins.
Building a rear extension is only half of the open-plan result. The original back wall still holds up the first floor and the rear wall of the bedrooms above, so opening it needs steel. Depending on the width and what is left to bear on, that could be a single beam on padstones, a beam on columns, or a full goalpost frame.
What to expect
- The building control completion certificate for the extension covers the steelwork to the old rear wall. Keep it with the engineer's calculations and drawings, as a buyer's solicitor will expect to see the structural paperwork for the extension.
- The original rear wall of most houses is load-bearing because it supports first-floor joists and the bedroom wall above. Even where the joists run parallel to it, the masonry overhead still needs carrying, so steel is almost always part of opening it up.
- Where the extension ceiling and the house ceiling should run through at one level, the steel may need setting higher into the floor zone or tying in with the extension roof structure. That choice changes the steel design, so it is settled before calculations.
- The opening is usually formed once the extension walls and roof are up, so the house stays secure and dry. Leaving it too late can hold up plastering and floor screeding, so the steel date is agreed with the builder early on.
- During the opening, props stand both inside the house and within the extension footprint. Where props bear on a newly laid slab, the propping plan checks that the slab can take those point loads, using spreaders where needed.
How the job runs in Stockton-on-Tees
Survey in Stockton-on-Tees
We visit, look at the wall and what sits above it, measure the opening and note services, access and how the steel can be brought in.
Engineer's design
A structural engineer sizes the beam, padstones and any posts, and sets out the temporary support needed while the wall is out.
Building control
We submit a building notice or full plans application to Stockton-on-Tees Borough Council, so approval is in place before the wall is touched.
Install and sign-off
Props go in, the opening is formed, the steel is set and packed, building control inspects it, and we make good.
Guide prices for rear extension steels in Stockton-on-Tees
As a guide, budget £2,300–£6,500 including VAT for opening into a rear extension in Stockton-on-Tees, based on published UK cost guides adjusted for prices in the North East (-7%).
| Job | Typical guide range | What it usually covers |
|---|---|---|
| Opening into a rear extension | £2,300–£6,500 | Original rear wall removed with a beam or goalpost, approvals and propping, coordinated with the extension build |
| Steel goalpost frame | £1,850–£5,600 | Two posts and a beam bolted as a frame, pad foundations, base plates and fitting |
| Party wall surveyor (agreed surveyor, per neighbour) | £840–£1,860 per neighbour | Schedule of condition and award where a neighbour dissents; serving notice alone, where the neighbour consents, costs far less (England and Wales only) |
| Structural calculations for a beam | £230–£700 | Site measure or photos, beam and padstone design and calculations for building control |
Figures include our approximate regional adjustment for prices in the North East (-7%) and are rounded. How these figures are worked out.
Building control and neighbours in Stockton-on-Tees
In England, taking out a load-bearing wall or putting in a beam is building work under the Building Regulations 2010. It needs approval from building control, either Stockton-on-Tees Borough Council or a registered building control approver, through a full plans application or a building notice. Part A covers the structure and Part B covers fire safety, which is why steel in homes is usually fire protected.
If the beam bears into a wall you share with a neighbour, the Party Wall etc. Act 1996 applies, and a party structure notice must be served at least two months before that work starts. We arrange this through a party wall surveyor.
Rear extension steels near Stockton-on-Tees
- Billingham 1.8 mi
- Thornaby-on-Tees 2.5 mi
- Middlesbrough 3.4 mi
- Hartlepool 9.2 mi
- Darlington 9.8 mi
- Newton Aycliffe 10.7 mi
Local questions answered
Do I need a party wall agreement for rear extension steels in Stockton-on-Tees?
Yes, if the beam bears into a shared wall: the Party Wall etc. Act 1996 applies in England and Wales, and a party structure notice must be served at least two months before that work starts. We arrange it through a party wall surveyor.
Do you also work near Stockton-on-Tees?
Yes. We also cover nearby towns including Billingham, Thornaby-on-Tees, Middlesbrough and Hartlepool.
When does the back wall come out during an extension build?
Usually once the extension walls and roof are up and the new space is weathertight. That keeps the house secure and dry while the opening is formed. The steel goes in, building control inspects it, and the builder then carries the floors and ceilings through.
How wide can a rear extension opening be?
There is no fixed limit, and openings across the full width of a house are common with the right steel. The engineer sizes the beam or frame for the span and the loads above. Wider spans need deeper or heavier steel and possibly columns, which affects headroom and cost.
Is the steel included in the extension's building regulations?
Yes. The steelwork is part of the extension, so the engineer's calculations go to building control with the extension application and the steel is inspected before it is covered. The completion certificate issued for the extension then covers the structural work to the rear wall.
Can I stay at home while the work is done in Stockton-on-Tees?
Usually, yes. The work area is screened and floors are protected. The rooms either side of the opening are out of action for a few days, and there is some noise and dust while the masonry comes out.