Single Wall Removal
Removing a non-structural or single stud wall — ideal for connecting a kitchen and dining room, or opening up a small hallway or landing.
Preston Knock Through Specialists
Knock Through Preston
Need a knock through in Preston? KJL Builders carry out knock throughs, load-bearing wall removal and steel beam (RSJ) installation for homes across Preston and the surrounding areas — every job designed by a structural engineer and fully signed off by Preston City Council building control.
Need other building work in Preston? See our Builders Preston page for house extensions, garage conversions, loft conversions, kitchens and more across the area.
Why Choose KJL Builders
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Experienced Knock Through & Steel Beam Specialists
Removing a wall to create open-plan living is one of the most effective ways to transform a home — but it has to be done safely, with the right structural support and full building control approval. At KJL Builders, we manage every stage of the process for homeowners in Preston — from structural design to the final steel beam sign-off — whether you live in a period terrace, a 1930s semi or a newer build, and we liaise with Preston City Council building control throughout.
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Experienced Specialists
Years of experience safely removing structural walls and installing steel beams.
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Fully Managed Projects
A complete service from structural design through to final finish.
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Quality Workmanship
High standards of craftsmanship and finishing on every job.
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Transparent Pricing
Clear, fair quotes with no hidden costs.
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Local Expertise
Local builders covering every Preston postcode and the surrounding areas.
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Fully Insured
Complete protection for your property and our team throughout the work.
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Building Control & Regulations
We liaise directly with building inspectors, structural engineers and architects on every knock through, and can source and appoint these professionals on your behalf if you don't already have your own.
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Pay As You Build
We don't take any payment until the steel beam has been installed and the work has been inspected and signed off by building control — so you're never paying up front on trust alone.
Areas we cover
Knock Throughs Across Preston Postcodes
We carry out knock throughs and steel beam installation across every Preston postcode district — from the centre out to the surrounding areas. Here's a breakdown of the areas within each postcode.
| Postcode | Areas Covered |
|---|---|
| PR1 | Preston City Centre, Avenham, Broadgate, Deepdale, Fishwick, St Matthew's, Penwortham |
| PR2 | Ashton-on-Ribble, Brookfield, Cadley, Fulwood, Grimsargh, Haighton, Ingol, Larches, Lea, Ribbleton, Riversway, Sharoe Green, Tanterton |
| PR3 | Barton, Bilsborrow, Broughton, Garstang, Goosnargh, Longridge, Ribchester, Whittingham |
| PR4 | Catforth, Cottam, Freckleton, Hutton, Kirkham, Lea Town, Longton, New Longton, Tarleton, Warton, Wesham, Woodplumpton, Wrea Green |
| PR5 | Bamber Bridge, Coupe Green, Cuerden, Gregson Lane, Higher Walton, Hoghton, Lostock Hall, Samlesbury, Walton-le-Dale |
Don't see your exact street listed? We cover the whole of Preston and the surrounding areas — get in touch and we'll confirm we cover your postcode.
What we do
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Types of Knock Through Work We Carry Out
Whichever walls you're looking to remove, our experienced team manages the project from structural design to final finish.
Load-Bearing Wall Removal
Safe removal of load-bearing walls with a steel beam (RSJ) installed to your structural engineer's specification, fully signed off by building control.
Chimney Breast Removal
Removing chimney breasts at ground and/or upper floor level, with steel beams or gallows brackets installed to safely support the structure above.
Full Open-Plan Conversions
Removing multiple walls to create one large open-plan kitchen, dining and living space — often the biggest layout transformation for the budget.
Steel Beam (RSJ) Installation
Supply and installation of structural steel beams, sized and specified by a structural engineer and installed to full building control standards.
Budgeting for your project
How Much Does a Knock Through Cost in Preston?
The cost of a knock through depends on whether the wall is load-bearing, the span of steel beam required, and whether any finishing or redecoration is included. Here are some rough examples to help with budgeting — we recommend a site visit for an accurate quote.
£1,500 – £3,000
Single Non-Structural Wall
Removing a stud or non-load-bearing wall, made good and ready to decorate.
£5,000 – £10,000
Load-Bearing Wall & Steel Beam
Structural wall removal with a steel beam installed and building control sign-off.
£15,000 – £20,000+
Full Open-Plan Conversion
Multiple walls removed with larger steel spans, for a full ground floor transformation.
For an accurate estimate, we recommend requesting a personalised quote based on your property and the walls involved. Get in touch →
No payment until your steel beam is signed off. We don't ask for any money until the steel beam has been installed and the work has been inspected and signed off by building control — giving you full confidence before any payment is made.
Recent projects
Knock Through & Steel Beam Projects We've Completed
Kitchen Knock Through
Commercial Knock Through
How it works
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Our Knock Through Process
At KJL Builders, we follow a clear and structured process to make sure every wall is removed safely and legally, from first consultation to final finish.
Initial Consultation
We visit your property to discuss which walls you'd like removed and what you want the finished space to achieve.
Structural Assessment & Design
A structural engineer assesses the wall and calculates the correct steel beam specification. We liaise with architects and building inspectors throughout, and can source these professionals for you if you don't already have your own.
Detailed Quotation
You'll receive a clear and transparent breakdown of costs, including the steel beam, labour and timelines. We don't take any payment until the steel beam has been installed and the building inspector has been out to inspect and pass it off.
Building Control Application
We submit the structural calculations and plans to building control for approval before any wall removal begins.
Wall Removal & Temporary Support
The wall is carefully removed with appropriate temporary propping and support in place throughout.
Steel Beam Installation
The steel beam is installed to the structural engineer's exact specification by our experienced team.
Building Control Inspection
The building inspector visits to check and formally sign off the completed steel installation.
Finishing & Making Good
We plaster, skim and finish the area so the new open-plan space looks seamless.
Customer feedback
What Our Clients Say
Feedback from homeowners who chose KJL Builders for their knock through or wall removal.
★★★★★
KJL Builders removed the wall between our kitchen and dining room and fitted a steel beam — the whole process was handled properly, with building control involved at every stage. The open-plan space has completely changed how we use the house.
★★★★★
We had a load-bearing wall removed to open up our lounge and kitchen. The team explained the structural side clearly, dealt with the building inspector directly, and the finish was excellent.
★★★★★
Fantastic job removing our chimney breast and installing a steel beam. Everything was signed off properly by building control and the wall was made good so you'd never know it had been there.
Questions answered
Knock Through FAQs
Useful information before you start planning a knock through or wall removal with KJL Builders.
Ask us a questionAll of them — including Ashton-on-Ribble, Fulwood, Ribbleton, Deepdale and Penwortham — plus the surrounding areas such as Fulwood, Bamber Bridge, Chorley, Adlington.
Costs typically range from £1,500 for a simple non-structural wall removal up to £20,000+ for a full open-plan conversion involving multiple load-bearing walls. Contact us for a personalised quote.
Removing an internal wall usually doesn't require planning permission, as it's an internal alteration rather than development. However, if the wall is load-bearing, you will need building regulations approval — we handle this for you.
Yes, if the wall is load-bearing. A structural engineer calculates the correct steel beam, and building control must inspect and formally sign off the completed work before it's covered over.
Yes. We work closely with building inspectors, structural engineers and architects on every knock through, and if you don't already have your own, we can source and appoint these professionals on your behalf.
A single wall removal with a steel beam typically takes around 1–2 weeks including finishing. Larger open-plan conversions involving multiple walls can take 3–4 weeks or more.
Not when it's done correctly. A structural engineer calculates the right size and specification of steel beam to safely support the structure above, and we install it to that exact specification.
Yes. We regularly remove chimney breasts alongside wall removals, installing steel beams or gallows brackets to safely support the chimney stack above.
We don't take any payment until the steel beam has been installed and the building inspector has been out to inspect and pass it off. You'll receive a clear, staged payment schedule for the rest of the work once that stage is complete.
Other services
Related Services
KJL Builders cover the full range of building work across Preston and the surrounding areas — explore our other Preston services below.
Nearby areas
Also Covering the Areas Around Preston
As well as Preston itself, we cover the surrounding towns and areas, including:
Ready to open up your living space?
Tell KJL Builders which walls you're looking to remove and arrange a free knock through quote anywhere in Preston or the surrounding areas.
Get in touch
Request Your Free Knock Through Quote
Fill in the form below with a few details about your project and we'll get back to you with a free, no-obligation quote.
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