Structural Alterations and Load Bearing Wall Removal in Kent
Knocking through a wall changes how a house works — a kitchen opens into a dining room, two small rooms become one, or a dark hallway finally gets light. It also changes how the house stands up, so the structural design comes before the sledgehammer. Mighty Oak Construction carries out structural alterations across Kent, with the engineering handled by trusted specialists and the building work by its own team.
First question: is the wall load bearing?
Some walls only divide space; others carry the floors or the storeys above. You cannot tell reliably from thickness alone — a stud wall can carry load and a block wall can carry none. The clues are in the direction of the joists, what sits above, and how the house was built, which is why the answer comes from an inspection rather than a guess.
A chimney breast adds its own complications: it may be supporting a shared stack with next door, and removing it downstairs while it remains upstairs needs proper support design. The same care applies to knocking through into a conservatory or outbuilding, where the existing wall is usually an external, load bearing one.
The steel does the work
Where a load bearing wall comes out, a designed beam — usually an RSJ or a fabricated steel — takes over its job. The structural engineer calculates the size from the loads above and the span, and designs the padstones or posts it bears on. That calculation is not optional: building control will ask for it, and so will your buyer’s surveyor when you sell.
Installation is sequenced so the house is never unsupported. Needles and acrow props carry the load while the opening is formed, the beam goes in on its bearings, and only then does the wall below come out. The props stay until the new structure is loaded and checked.
Building regulations and paperwork
Removing a load bearing wall is structural work, so building regulations approval is required whether or not planning permission is. The engineer’s calculations go to building control, the work is inspected, and a completion certificate is issued at the end. Keep that certificate safe — it is the document a future sale will need.
If the wall is shared with a neighbour, or the work cuts into a party structure, the Party Wall Act may require notice before starting. That is a separate process from planning and building control, and it is raised at the survey rather than discovered mid-job.
Making good is part of the job
A knock-through is only finished when the room looks like the wall was never there. That means plastering the reveals and ceiling line, matching or renewing skirtings and flooring across the opening, and decorating both sides. Plastering and finishing are in-house trades at Mighty Oak, so the making good is in the same quote as the structural work rather than an afterthought.
Where the alteration is part of a bigger project — an extension opening, a kitchen refit or a full renovation — it is sequenced into that programme so the steels go in at the right stage and the room is only opened once.
What changes the cost
The price is driven by the span and the load above, the size of steel the engineer specifies, access for getting the beam in, whether a chimney breast or party wall is involved, and how much making good the finishes need. A single doorway-width opening in a non-load bearing wall is a small job; a wide opening across the back of a house with a steel and posts is a different one. The site visit and the engineer’s design are what turn that into a firm written quote.
Structural alterations across the local area
The team works from the Tunbridge Wells base across the places below. Every structural job starts with a look at the actual building, because two identical-looking houses can carry their loads very differently.
- Tunbridge Wells
- Tonbridge
- Sevenoaks
- Maidstone
- Paddock Wood
- Edenbridge
- Crowborough
- East Grinstead
- Cranbrook
- Hildenborough
A builder who handles the whole job
Mighty Oak Construction is family-run and fully insured, with founder Elliot — a third-generation craftsman — as your point of contact. The core trades are in-house, and structural engineering, electrics and plumbing are handled by trusted specialists. The site visit is free and the quote is itemised in writing.
Structural Alterations: questions before commissioning
How do I know if I can knock down a wall?
Only an inspection can say. The direction of the joists, what is above the wall and how the house was built determine whether it carries load. A non-load bearing wall can usually come out with little fuss; a load bearing one needs a designed beam and building control approval.
How do you knock through a load bearing wall?
The load is supported on needles and props, the opening is formed, a designed steel beam is installed on proper bearings, and the wall below is removed once the new structure is carrying the load. The props stay in place until everything is checked.
How much does it cost to knock through a wall?
It depends on the span, the load above, the steel specified, access and the making good. A firm figure needs the engineer’s design, which is why the quote follows the survey rather than preceding it.
Can you knock through a wall with a chimney breast?
Yes, but the breast may be structural or shared with a neighbour, and removing part of it needs proper support design for what remains. It is assessed as part of the structural design, not treated as ordinary demolition.
Do I need building regulations approval to remove a wall?
If the wall is load bearing, yes — building control will want the engineer’s calculations, inspections and a completion certificate. Keep the certificate; you will need it when you sell.
Open up the house properly
Book a free site visit with Elliot to assess the wall and get an itemised written quote for the alteration.