Opening the Wall Between Kitchen and Living Room

You can remove a load-bearing wall between a kitchen and living room in most houses: the wall is replaced by a beam, often steel, sitting on posts that carry the load down to footings in the basement. The work needs a design from a qualified designer or engineer and a building permit. What makes kitchen walls harder than most is everything inside them, and the decisions about where the beam and posts end up in a room full of cabinets.

This post covers what's specific to the kitchen version of the job. For the general process of removing a bearing wall and setting a beam, see how to remove a load-bearing wall and install a beam.

Is the wall actually load-bearing?

Many walls between kitchens and living rooms are bearing walls, because they often sit near the middle of the house where floor joists need support. Signs that point that way:

• The floor joists above run across the wall, not parallel to it, and lap or splice over it.
• There's a wall directly above it on the second floor.
• There's a beam, girder or wall directly below it in the basement.
• It runs along the centre line of the house, parallel to the long exterior walls.

None of these proves it either way. A parallel wall can still carry a point load, and a wall that looks like a partition can be holding up a beam end. The designer confirms what the wall carries before anything comes out. That's also where a permit starts, covered in permits for load-bearing wall removal in the GTA.

What's hiding in a kitchen wall

Kitchen walls are busy. Before demolition, plan for:

• Drain and vent stack. If the sink is on or near the wall, a drain and vent pipe likely runs up through it. A vent stack can't just be cut out; it has to be rerouted to a new location by a licensed plumber, and the change is part of the permit.
• Water lines feeding the sink, dishwasher or fridge.
• Gas line to a range, if it runs through the wall.
• Ducts. Heating supply, return air and the range hood exhaust often travel through interior walls or the joist space above them.
• Electrical. Counter receptacle circuits, lighting and switches. Moving them is a job for a licensed electrician.

The services often decide the beam type. A flush beam leaves no room for ducts crossing the old wall line, so they may have to move or pass through a bulkhead.

Flush beam or dropped beam in a kitchen

A dropped beam hangs below the ceiling, with the joists sitting on top of it. It's the simpler and usually lighter option, and the code span tables for steel beams assume this arrangement: joists bearing on the top flange, with wood strips on both sides providing lateral support (Sentence 9.23.4.3.(3) of the 2024 OBC). In a kitchen, a dropped beam can often line up with upper cabinets, a bulkhead or the edge of an island, so it reads as part of the design.

A flush beam sits up in the ceiling framing so the ceiling stays flat across both rooms. The joists hang off the sides of the beam on hangers, usually attached to wood nailers bolted to the web. It's the cleaner look for a true open plan, but:

• The beam must be shallow enough to fit within the joist depth, or the ceiling gets a small drop anyway.
• Hanging joists off the beam changes the lateral support conditions, so the beam is engineered rather than taken from a table.
• Every service crossing the old wall line in the joist space has to be rerouted.

This is where steel earns its place in kitchens. For the same load, a steel W-beam is shallower than wood or LVL, which is often what makes a flush beam possible. Our comparison of steel beam vs LVL explains why.

Where the posts go

The beam needs a support at each end, and longer openings may need one in between. In a kitchen, post locations usually end up:

• At each end of the opening, buried in the remaining wall stubs or the exterior wall.
• Inside a cabinet run or pantry end, where a post can be framed in and boxed.
• In an island, if the opening is long enough to need a mid-span support and the island sits on the beam line.

Whatever the kitchen designer prefers, the structure decides. Each post needs:

• A continuous load path down. A post on the main floor has to land on something below it: a new post in the basement, a beam or a foundation wall, and finally a footing sized for the load.
• Bearing for the beam. The beam needs even, level bearing at least 89 mm long at its end supports (Sentence 9.23.8.1.(1)).
• A fastened connection. Columns have to be securely fastened to the member they support (Sentence 9.17.2.2.(1)).

The basement end of the job is often bigger than expected. If the existing basement beam was supporting the old wall, it still has work to do, and the two new post loads from above need to reach footings. That can mean new posts, cutting the basement slab and pouring footings. Wider post spacing means bigger loads on each post and bigger footings, so the basement work is part of the design, not an afterthought.

How big will the beam be?

Kitchen to living room openings are commonly in the 3 m to 6 m range. The size depends on the span, how much floor the beam carries, and whether a second floor or roof comes down onto it. Our guide to steel beam sizes for 3 m to 6 m spans shows the code table answers by span, and links to the longer-span and second floor cases.

Flush beams, point loads from above and long openings are usually engineered, and the engineered size is what goes on the permit drawings.

How the job usually runs

A kitchen wall removal typically goes in this order, with different trades at each step:

1. Design and permit. The designer or engineer confirms the loads, sizes the beam, posts and footings, and the drawings go in for a building permit.
2. Order the steel. The beam is fabricated to the measured length with cap plates, bolt holes for wood nailers, and any connections the drawing shows.
3. Disconnect and reroute services. Plumber, electrician and HVAC trades cap, move or reroute what's in the wall.
4. Temporary shoring. Shoring walls go up on both sides to carry the floor while the wall comes out.
5. Footings and posts. New footings are poured and posts set where the drawings show.
6. Set the beam. The beam goes up onto the posts, is fastened, and the joists are connected or hung.
7. Inspection and close-up. The building inspector checks the framing before drywall, then the ceiling, flooring and cabinets are finished.

Removing a wall between a kitchen and dining room follows the same steps. Those openings are often shorter, but the same services tend to run through them. For what goes into the price, see our load-bearing wall removal cost guide explains what goes into the price.

Getting the steel for your kitchen opening

We fabricate steel beams and posts to your engineer's drawings, with plates and holes ready for install, deliver across the GTA and Ontario, and supply and install basement beams and posts. If your project still needs a design, engineering services are available; tell us about it when you request a quote. Send us your drawings or measurements, or see our services.