How an open floor plan really happens

October 2026

Opening up a floor plan in a Massachusetts house is a small structural project, with a permit, a beam, whatever turns up inside the wall and careful patching at the end. Here is how it usually goes when we do it.

First, find out what the wall is holding up

Every open floor plan conversation starts with one question: is the wall load-bearing, or is it a partition? A partition wall only divides space. A bearing wall carries weight from above, whether that is the second floor, the attic or the roof. You cannot tell which one you have by knocking on it.

So we go up and down. In the basement we look for a beam, a girder or another wall running directly under the one you want gone. In the attic or through an opening in the ceiling we look at which way the joists run and whether they land on that wall. Joists that stop on top of a wall are a strong sign the wall is working. Many Capes and colonials have a center bearing wall running the length of the house, and it is very often the exact wall standing between the kitchen and the living room.

Older houses add a wrinkle. Plenty of New England homes were balloon framed, with studs running continuously from the sill up past the second floor, so a first-floor wall can be tied into framing you would never guess. Plaster also hides more than drywall does, because there is no seam or screw line to read.

If the wall carries a load, we will tell you before anyone swings a hammer, along with what it takes to remove it properly. Sometimes the honest answer is that the wall can come out but a post has to stay, and it is better to hear that at the kitchen table than in the middle of demolition.

Beams, posts and where the weight goes

When a bearing wall comes out, the load it carried does not disappear. It needs a new path. A beam takes the weight the wall used to carry and spans the opening. At each end the beam sits on a post, and each post has to bear on something solid all the way down to the foundation. That last part is the one people forget. A post that lands on a subfloor with nothing under it just moves the problem into your basement.

There are two basic ways to set the beam. A flush beam sits up inside the ceiling, level with the joists, which hang from it on metal hangers, so you see a flat ceiling from one room into the next. A dropped beam hangs below the ceiling line. It is simpler to install and sometimes it is the right call, especially when the space above cannot be opened. Some owners like a dropped beam wrapped in trim as a deliberate detail. Others want it out of sight.

The size of the beam comes from the span, the load above it and the material. For many openings a structural engineer sizes the beam and posts and provides a letter or drawing the building department can review. Engineered lumber and steel are both common, depending on the span and how much depth the ceiling has to give. If the basement has nothing under a post, that can mean a new footing poured so the load reaches the ground properly.

Before the old wall comes out, temporary shoring walls go up to carry the floor or roof while the change is made. They stay until the beam and posts are in and fastened. Shoring takes up room for a while, but it is what keeps ceilings from cracking and floors upstairs from sagging during the work.

What is usually inside the wall

Walls are where houses run their services, and a wall between a kitchen and a living room is a favorite spot. Before demolition we open the wall in a few places so we know what is in there before we plan around it. Guessing at it is how a simple opening turns into rework.

Wiring is the most common find and usually the easiest. Switches, outlets and the circuits feeding the room get rerouted through the ceiling or into new walls by a licensed electrician, which Massachusetts requires. In older homes, demolition sometimes turns up knob-and-tube wiring still in service, and that conversation rarely stops at the one wall.

Plumbing is harder. A bathroom upstairs often drains down through the wall below it, and the vent stack may be in there too. Drains need slope and vents need a path, so moving them means a licensed plumber working out a new route through the floor framing. Heating ducts or a return can usually be shifted through the joist bays or boxed into a soffit. Hot water heat is its own case, with supply and return lines or a radiator that may need to move.

Occasionally something stays. A stack that cannot be moved without tearing up a bathroom can be wrapped into a column, a partial wall or a built-in, and done carefully it looks planned. We would rather lay that choice out at the start than act surprised halfway through.

If your house was built before 1978, the paint on that wall may contain lead. Renovation in those houses follows lead-safe work practices under the EPA renovation rule, which shapes how we contain the area, cut and remove material, and clean up.

Permits, inspections and the license behind them

Removing a bearing wall is structural work, and in Massachusetts that falls under the State Building Code, 780 CMR. It means a building permit through your town or city building department before the wall comes out. The electrical and plumbing changes that go with it need permits of their own.

The Construction Supervisor License is the Massachusetts license for supervising structural work on one- and two-family homes. Steve holds an unrestricted one, and structural permits on our jobs are pulled under it. The person whose license is on the permit answers for the work meeting code, and that is who the inspector expects to deal with. Electricians and plumbers usually pull their own permits under their own licenses.

Inspections happen along the way. The usual pattern is a rough framing inspection while the beam, posts and connections are still exposed, rough electrical and plumbing inspections for the trades, an insulation inspection where outside walls or ceilings were opened, and a final once everything is finished. We do not close a ceiling or wall over work the inspector has not seen.

How long a permit takes depends on the town and what the department wants to see. Some ask for drawings and the engineer's beam specification with the application. We plan the schedule around the review rather than promising a start date we do not control, and we tell you where things stand while we wait.

The days the wall actually comes out

Demolition day starts with protection. Floors in the work area and along the path in and out get covered. Dust walls with zippered doors close off the rest of the house, and nearby heating and air returns get sealed so dust is not pulled through the system. You are usually still living there, so we plan which rooms stay usable and when the loud work happens.

The licensed trades shut off and disconnect what is in the wall before anyone cuts into it. Shoring goes up. Then the wall comes out in a controlled order, with debris going straight out instead of piling up in the next room. Plaster comes down heavy and dusty, so we work in sections.

With the opening clear, the posts and blocking go in, the beam is set and the joists are connected to it. Once framing passes inspection, the trades finish their rough work and the ceiling and floor can start closing up. Each day ends with the site cleaned and the protection checked.

Steve started this company after years of working for guys that lacked communication, and his standard is short: "Better communication and will make sure the job is done right." On a job like this, you hear what happened today, what is next and anything we found inside the wall, before you have to ask.

Patching the floor where the wall used to be

Once the wall is gone, there is a strip of floor a few inches wide where it stood. That strip is the part of an open floor plan most people never think about, and it is where a careful job and a quick one look most different.

The two rooms are often not the same. One side may be oak and the other maple, the boards may run in different directions, or one room was redone with a different product years ago. Heights can be off too, especially where a kitchen floor has been layered up over time. We check all of that before demolition so the floor is part of the plan.

With matching hardwood running the same direction, the best repair is lacing in new boards at staggered lengths, woven into the existing field, instead of one straight patch strip that will always show. When the rooms do not match, a border board or a deliberate transition can make the change look intended. New flooring through both rooms gives the cleanest result and is also the biggest change, and we lay those options out side by side.

New wood next to old wood will not match in color on its own. Usually the honest way to an even finish is to sand and refinish the whole connected floor once the patch is in. A spot-finished patch tends to show once low afternoon light runs across the floor.

Ceilings, lighting and the finish work

The ceiling has its own seam where the wall met it, and a flush beam gets wrapped and finished so the ceiling reads flat end to end. With drywall ceilings that is ordinary taping. With plaster it takes more thought, because new drywall and old plaster are not the same thickness, and the plaster around the opening often lets go once you work near it.

Sometimes we can blend new material into the plaster and skim the transition. Sometimes the ceiling is rough enough that skim coating the whole surface, or replacing it, beats patching around the edges. We look at the plaster with you and tell you which way we would go in our own house.

Two rooms used to have two lighting plans, and one large room usually needs a new one. Recessed lights have to work around the joists and the beam, and switches need to land where you will reach for them. The electrician lays it out while the ceiling is open, which is far easier than cutting into finished drywall later.

Then comes the finish work. Wall ends get returned and cornered cleanly, baseboard and trim are matched or remade so the profile carries through, and walls and ceilings are painted as whole surfaces instead of patched spots. That is what makes the room look like it was always meant to be open.

What to sort out before we start

A good open floor plan is mostly settled before demolition. Decide how open you want the space, and whether a post, a partial wall or a dropped beam would bother you if it turned out to be the sensible answer. Think about how the kitchen will work once it faces the living room, and where the heat comes from if a radiator sits on the wall that is going away.

We start with a walkthrough, basement and attic included, then put the work in a written scope that says what is coming out, what is going in, who does which part and how changes are handled if the wall turns up something new. If you are thinking about opening up a kitchen or a whole first floor, call Modern Remodeling at (781) 974-4263 and we will come look at the wall with you.