The kids share a room, the coats live on the stair rail, and nobody has a quiet corner.
You like your house and you like your block, and the only thing wrong with either one is square footage. That is what a home addition contractor is for: more room, tied into what you already own, without the finished thing looking bolted on from the alley. We frame it, tie into the existing roof and foundation, and finish the bath in the new space, which is how most of this work finds us to begin with.
What makes one addition cost more than the next is the lot, not mystery. How tight the gangway is, whether a machine can get back there or we are barrowing dirt out by hand, how deep we go for footings below frost, and whether your panel can carry another load. Room addition contractors quoting off a phone call and a photo are guessing.
Keep going and you get how home addition construction actually runs, what changes the number, when an addition is the wrong answer for what you want, and the things people ask before they book. Call (773) 377-9135 and I will come stand in the space with you.
Home Addition Design
Good home addition design starts with a tape measure and your deed, not a mood board. Before I draw anything I want to know your lot coverage, your setbacks, where the sewer line runs and how the new roof is going to meet the old one without looking like a hat somebody borrowed. Half the ugly additions on the North Side got that last part wrong.
Then we talk about what the addition steals. An extra bedroom usually eats a hallway or a chunk of the back porch, and most room addition contractors won't mention that until framing day. I will.
Size drives the budget, but so does the foundation. Footings below the frost line cost more than a slab, and a mudroom sitting over a crawl space changes the mudroom addition cost before a single stud goes up. Access matters too, since a tight city lot means hand-digging.
Our bathroom remodeling company handles the wet rooms inside these additions as well.
Home Addition Construction
Home addition construction is where the drawings stop being drawings and somebody is standing in your yard with a shovel. Once the home addition design is settled and the permit comes back from the city, we lay out the footprint against your setbacks, dig, and pour footings deep enough that frost heave cannot lift the new corner away from the old house. The depth gets pulled for your soil and your lot before we form anything.
That seam between new and existing is where weak work shows up: a lazy tie-in cracks the drywall joint by the second winter, and you repaint the same line every year forever.
Then comes framing, tying the new roof into the existing rafters, flashing it, and matching the outside as close as the original will allow. On a brick bungalow, nobody gets an invisible match. Anyone telling you otherwise has never tried to source fifty-year-old common brick.
Access changes the schedule more than square footage does. A mudroom addition cost rides lower on a slab near the existing mechanicals and climbs once we run water, waste and a new circuit out there, or when the only way in for a mini excavator is a gangway you can touch both sides of. As your home addition contractor, I size that up before I quote anything.
What the job involves
Hiring a home addition contractor means hiring somebody to open up a house that is already standing, which is a very different afternoon than building on a bare lot. We start underground.
Footings get dug below frost so the new slab and the old foundation move together instead of arguing with each other every spring, and if your bungalow sits on a narrow lot, how we get a mini excavator down the gangway changes the whole schedule before a shovel moves.
Then the tie-in. Cutting the existing roof and wall open, setting a beam, matching the brick or siding so the addition doesn't look like a sticker on the back of the house.
Second floor addition contractors have a harder version of the same problem, because the walls and footings below have to carry the new load, and sometimes they need help in the basement before anything goes up.
Smaller work follows the same logic. What moves a laundry room addition cost is mostly how far water, drain and vent have to travel, plus whether the panel can handle a dryer circuit.
A real addition runs weeks, not days, with permit review ahead of it. Framing goes fast. Inspections, drywall and finish are where the calendar actually lives.
What it costs
What it costs comes down to a handful of things, and square footage is only the first one. Building out into the yard means footings dug below the frost line, which is deep here, and it means a foundation, a roof tie-in, and a new hole cut in a wall that was holding something up. Going up is a different bill entirely.
Second floor addition contractors are really buying you a structural question first: whether your existing walls and foundation can carry another floor, or whether we're sistering joists and adding beams before a single stud goes vertical. Stairs eat floor space downstairs too, and people forget that until they see the plan.
Plumbing moves the number more than almost anything. A laundry room addition cost sitting near the existing stack is one conversation; dragging supply, drain and a vent line across the house is another. Add access, since a bungalow lot with no alley means everything gets carried by hand.
Finish level does the rest. Tile, cabinets, windows and trim can swing the total further than the framing ever will.
Want a real figure for your house? Ring me on (773) 377-9135 and we'll walk the space. Any honest home addition contractor needs to see it standing up.
When home addition contractor is the wrong fix
Sometimes the right answer is that you don't need a home addition contractor at all, and I'd rather say so before anybody frames a wall. If the real complaint is one bathroom and four people, we can usually find the square footage inside the house you already own, borrowing from a hall closet or a back bedroom, and you keep your yard.
Second one: headroom. Plenty of bungalows here have a full attic that's only unusable because the roof pinches at the knee wall. Ask about dormer addition cost before you price a ground-floor build. Smaller footprint, shorter schedule, same bedroom at the end of it.
Third, and this is the one people hate hearing. If water's coming through the foundation or the joists are sagging, adding load to that house makes the problem worse and buries it behind new drywall. Fix the structure, dry out the basement, then talk about building. The addition will still be there next year.
Why choose us for this
You've got a house you like on a street you like, and not quite enough of it. What you want from a home addition contractor isn't artistry, it's to hire somebody once, stop thinking about it, and have the room still be dry and square in ten years.
Here is what I will not do to this job: tie a new addition onto your existing structure without opening up the wall and seeing how the old framing actually sits. Plenty of home addition builders guess at that, frame fast, and you find out in the second winter when the drywall seam above the doorway opens up because two parts of the house are settling at different rates.
Footings go below frost depth, and the new roof gets tied in with proper flashing, not a bead of caulk and a prayer.
The number on the phone is a guess until somebody's been in your basement. What moves it is the foundation work, how far your plumbing stack sits from the new space, whether we're going up or out, and what the permit office wants for your block. Bathroom addition contractors who quote before seeing that are quoting a fantasy.
An estimate costs nothing and nobody here chases you afterward.
Frequently asked questions
Do I need a permit to build an addition in Chicago?
Yes, and any home addition contractor telling you otherwise is handing you a problem you'll meet again at resale. Stamped drawings, a zoning check and plan review all come before a shovel moves, and that paperwork stretch routinely runs six to twelve weeks depending on how busy the department is and whether your lot needs any relief.
Can we live in the house while the addition goes up?
Almost always. We frame and roof the new shell first and leave your existing wall standing, so the opening only gets cut once the addition is weather tight. Until then you get a sealed dust wall with zippered plastic, and the heat stays where it belongs through a Chicago February.
Is an above garage addition cheaper than building on a new foundation?
Often, since the footings already exist. But that's only true if they can carry a second story. We open the garage ceiling and check the framing and the slab edge before anyone promises you anything, because an undersized footing changes the whole scope.
Contact Bathroom Remodeling Chicago Pros now
Contact our bathroom remodeling Chicago pros now and the first thing that happens is simple: we come out, walk the house with you, and figure out whether what you want is a bump-out, a second story, or a dormer. Have your plat of survey handy if you can find it. That one piece of paper tells me your setbacks, and setbacks decide more about an addition on a standard city lot than anything you will see on Pinterest.
What moves a dormer addition cost is mostly hidden above your head: the pitch of the existing roof, whether those rafters were ever sized to carry a floor, where the stair lands, and how far the new bath sits from the existing waste stack. On a brick bungalow with a knee wall already framed, that is a different conversation than cutting into a truss roof.
Call us at (773) 377-9135 weekdays, nine to five, and if you reach voicemail leave the address and the block, because I look up the lot before I call back. Ask whatever you want about the permit route, the zoning review, or why a general contractor for home renovation handles that part instead of you. Hiring one home addition contractor for the whole thing is the point.