Bump-out
$70,000 – $130,000
100–200 square feet — a dinette, an enlarged primary bath, a mudroom, or a sunroom off the back, on a new foundation or cantilever.
← Everything we build
Home additions in Crystal Lake, IL.
An addition is the only remodel where you can see the seam from the street. Matching a twenty-year-old roofline, siding profile, and window proportion takes more planning than the framing does — and it is the difference between a house that grew and a house that has a box on the back.
- Typical range
- $70,000 – $500,000+
- On site
- 4–8 months
- Booking out
- 2–5 months
What's included
What your addition project includes.
- Footings, foundation or crawlspace, and structural tie-in to the existing house
- Framing, roof tie-in, sheathing, windows, siding, and roofing matched to the original
- Single-story family rooms, dinettes, sunrooms, and four-season rooms
- Primary suite additions with bath and closet
- Second-story additions and dormers
- In-law suites and ADUs where the village allows them
- Full interior finish, plus reworking the rooms the addition opens into
- Extending HVAC, electrical service, and plumbing to carry the new load
Before you commit
What to plan for before you start.
- Setbacks, lot coverage, and easements — these decide the footprint before design does
- Whether the existing furnace and electrical panel can carry the added square footage
- How the new roof meets the old one, and whether the shingles will ever match
- Where the addition opens into the existing house, and what that does to the rooms around it
- Village review and permitting, which on an addition is measured in weeks, not days
What it costs
Addition pricing, in the open.
Single-story addition
$150,000 – $280,000
300–500 square feet of new finished space: a family room, a primary suite with bath and closet, or a kitchen expansion with the adjoining rooms reworked.
Second story or multi-room
$280,000 – $500,000+
A full second story, a large multi-room wing, or an in-law suite with its own entrance, kitchen, and bath.
What moves the number
- Roughly $350–$550 per finished square foot in this market, before site conditions
- Foundation type — a full basement under the addition versus a crawlspace or slab
- Roof geometry: a simple gable tie-in is far cheaper than cutting into a hip
- Whether the furnace, panel, and water service need upsizing to carry the new space
- Village review time, which costs schedule rather than dollars but is real
These are what addition projects like these run around Crystal Lake and the surrounding northwest suburbs — from the remodels Tim has paid for himself and what the crews we hire quote today.They are not a quote. Yours depends on the house, the layout, and what you pick. You'll get a fixed-scope written proposal after the consultation, at no charge and with no obligation.
Timeline
How long your addition project takes.
Build time on site
4–8 months
From signed proposal to start
2–5 months
Design, engineering, and village approval run before any site work. On an addition, that front half is most of the calendar — and skipping it is how additions go wrong.
How it works
From first call to final walkthrough.
- 0115 minutes
Tell us about the project
A phone call or a form. Fifteen minutes.
- 0260–90 minutes
In-home consultation
Tim walks the space with you. No charge, no pitch.
- 032–6 weeks
Design and selections
Layouts, materials, and allowances settled on paper.
- 04About a week
Written proposal
Fixed scope, line-item price, payment schedule, start date.
- 05Varies by project
Build
Dust walls up, floors covered, one person accountable.
- 061–2 weeks
Walkthrough
Punch list, final walk, and the paperwork on everything installed.
Home Additions questions, answered.
Is an addition cheaper than moving?
Often, once you count a realtor's commission, transfer taxes, a new mortgage at current rates, and the fact that you'd be buying someone else's kitchen. We'll be straight with you at the consultation if your project isn't one of those cases.
How long does an addition take?
Four to eight months on site, with another two to five months of design, engineering, and village approval before that. Anyone quoting you an addition in six weeks is quoting a different job.
Will the new siding and roof match?
The siding profile, yes — we match it or we re-side the affected elevation so there's no seam. Shingles on a roof over eight years old will never match exactly; we'll tell you that at the consultation and show you where the line will fall.
Do you handle the village and the architect?
Yes. We coordinate drawings, structural engineering, zoning review, and permits, and we tell you what each one costs before you commit. You don't chase the village; we do.
Can we live in the house during the build?
Almost always. The addition is built outside the envelope, and the house stays sealed until we cut through — usually late in the schedule, and for a short window we plan with you in advance.
Home Additions across McHenry County and nearby.
Projects worth combining into one contract.
Combining projects into one contract saves a second mobilization and a second round of dust. If something else is on the list, say so at the consultation.
Kitchen Remodeling
Full gut kitchens, layout changes, cabinetry, stone, and the structural work behind an open floor plan.
Projects from$45,000Details
Bathroom Remodeling
Gut bathroom remodels, curbless and tiled showers, primary suites, and the waterproofing nobody else shows you.
Projects from$22,000Details
Basement Finishing
Full basement build-outs: family rooms, baths, bars, gyms, and in-law suites, done dry and done to code.
Projects from$45,000Details
Free consultation
Get a free addition consultation.
Tell us what you want to change and roughly what you're hoping to spend. Tim will call you back, and if it's a fit he'll come see the space at no charge.