Designing a room zoning will not allow
Owners pay for plans, then learn the addition crosses a setback. We check setbacks, height limits and lot coverage before the first drawing, so you only design what the town will approve.
Home additions · Licensed & insured
More room without moving, priced from the lot up,
not from a brochure.
Build out, build up, add a primary suite, a sunroom or a screened porch. Each option below shows what it typically costs and how long it takes, and every estimate starts with a check of your setbacks, foundation and roofline before anyone draws a plan.
Text your address and one photo of the side you want to build on. A licensed supervisor tells you which addition the lot allows, within 5 minutes during business hours.
- 5Addition types
- 3 wk–10 moTypical builds
- 4.9410 reviews
- 24hWritten estimate
Why additions go wrong
Most addition overruns start in the ground and at the roofline.
The costly surprises in an addition rarely come from finishes. They come from zoning found too late, footings that meet bad soil and new roofs that leak where they meet the old one.
A foundation nobody checked
Soft soil under new footings or light footings under a second story can add tens of thousands mid-build. We assess the soil and the existing structure first and put the result in the estimate.
A leak where old meets new
The joint between the new roof and the house is where additions fail. Every tie-in we build is flashed, lined with ice-and-water shield and photographed before it is covered.
Additions we build
Five ways to add space, each with its own price and build time.
Start with the option closest to what you picture. Every page shows the price tiers, what is included, the build schedule and what we usually find at the site.
Home addition
Bump-outs and new ground-level rooms added to the side or back of your house, priced from footings to the last coat of paint.
- Typical range
- $35k–$320k+
- Typical time
- 6 to 26 weeks
Second story addition
Going up instead of out: a new floor over all or part of the house, with the structure checked by an engineer first.
- Typical range
- $150k–$750k+
- Typical time
- 5 to 10 months
Master suite addition
A new primary bedroom with its own bathroom and walk-in closet, built as an addition on the ground floor or above.
- Typical range
- $95k–$375k+
- Typical time
- 14 to 30 weeks
Sunroom addition
A glass-walled room added to the house, built as a three-season room or a heated four-season room you use all year.
- Typical range
- $30k–$180k+
- Typical time
- 4 to 16 weeks
Screened porch addition
An attached, roofed porch with screen walls, built on its own footings and tied into your roof so it reads as part of the house.
- Typical range
- $25k–$120k+
- Typical time
- 3 to 12 weeks
Not sure which addition you need
Match the problem you have to the addition that solves it.
Homeowners usually know what they are short of, not what the project is called. Find the sentence that sounds like your house; the supervisor confirms it on the lot.
Ask a supervisor which one fits| If you want to | Start with |
|---|---|
| Add a family room, office or bedroom and have yard to spare | Home addition |
| Add bedrooms but the lot has no room to build out | Second story addition |
| Stop sharing a hall bath with the kids | Master suite addition |
| Sit in daylight with a view of the yard, even in winter | Sunroom addition |
| Eat and relax outside without bugs or rain | Screened porch addition |
| Give a parent a ground-floor bedroom and bath | Master suite addition |
Addition costs at a glance
What each addition costs, side by side.
Ranges for typical sizes with mid-range materials, matched exteriors and permits included. A screened porch and a second story differ by a factor of ten, so the type matters more than the square footage.
| Service | Typical range | Typical time |
|---|---|---|
| Home addition | $35k–$320k+ | 6 to 26 weeks |
| Second story addition | $150k–$750k+ | 5 to 10 months |
| Master suite addition | $95k–$375k+ | 14 to 30 weeks |
| Sunroom addition | $30k–$180k+ | 4 to 16 weeks |
| Screened porch addition | $25k–$120k+ | 3 to 12 weeks |
Ranges are typical project totals including labor, materials, permits and engineering where needed; your written estimate replaces them with a fixed price after the lot visit.
Additions before and after
Two houses, one that went out and one that went up.
How an addition project runs
From the lot check to the day the wall opens.
The same four steps for every addition, whether it is a screened porch on a deck or a full second floor.
Step 01
Free assessment
On-site visit, scope review, honest repair-or-replace opinion. No pressure, no decision needed that day.
Step 02
Fixed-price plan
Itemized quote with Good, Better and Best options, a declared contingency and a dated schedule.
Step 03
Permits and prep
We pull permits, schedule inspections and send you a room-by-room prep checklist.
Step 04
Build and walkthrough
Daily updates, clean site every evening, final walkthrough and a written warranty in your hand.
Written into every contract
Six promises you can hold us to.
The approved price is the final price. Change orders only with your written approval.
A credit for every working day of delay we cause. Weather and inspections excepted, in writing.
Dust barriers, floor protection and a clean-up before we leave. Your home stays livable.
A text or email every working day with photos and tomorrow's plan, or the day is free.
Workmanship warranty in writing, transferable to the next owner, backed by a fixed address.
A small deposit, then you pay only for work that is already completed, inspected and photographed.
Other additions we quote
Smaller additions, priced inside the same estimate.
Mudrooms, bay windows, dormers and garage additions are built by the same crews and priced as lines in your addition estimate, with one permit and one supervisor.
- Room Addition
- Bump Out Addition
- Bedroom Addition
- Family Room Addition
- Four Season Room Addition
- Three Season Room Addition
- Garage Addition
- Attached Garage Construction
- Detached Garage Construction
- Mudroom Addition
- Dormer Addition
- Bay Window Addition
- Cantilever Addition
- Breezeway Construction
Addition questions
What people ask before choosing an addition.
Building out or building up: which costs less?
Building out at ground level is usually cheaper per square foot, often $250 to $450, because the existing roof and foundation stay untouched. A second story runs about $300 to $500 per foot but keeps the yard and suits small lots.
What is the difference between a sunroom and a screened porch?
A sunroom has glass walls and, as a four-season room, insulation and heat, so it works in winter. A screened porch has screen walls under a solid roof and is used in warm months. A porch costs roughly half as much as a heated sunroom.
Should I add a master suite or a regular room addition?
Choose a primary suite when the goal is a private bedroom with its own bath and closet. Choose a regular room addition for a family room, office or extra bedroom without plumbing, which costs noticeably less per square foot.
Which addition adds the most value to a house?
Additions that add a bedroom or a bathroom usually support the sale price most, because appraisals count them. A primary suite or a second story with bedrooms tends to do better than a sunroom or porch, which appraisers value lower.
Which addition is fastest to build?
A screened porch on a sound deck can be finished in 3 to 5 weeks, and a three-season sunroom in 4 to 7. A ground-level room takes 12 to 18 weeks, a primary suite 16 to 22 and a full second story six to nine months.
How do I know which addition my lot allows?
Zoning sets setbacks, height limits and how much of the lot can be covered. We check your survey against those rules before the visit and tell you which addition types fit, so you do not pay for a design the town will reject.
Addition crews near you
Your remodeling address, within our service area.
Setbacks, frost depth and snow loads change from town to town. Additions are built by local crews under the license of the state the house is in.
- Maine
- New Hampshire
- Massachusetts
- Rhode Island
- Connecticut
- New York
- New Jersey
- Pennsylvania
- Delaware
- Maryland
- Virginia
- North Carolina
- South Carolina
- Georgia
- Florida
- Check your remodeling address
Free addition estimate
Pick your addition. Get the lot checked and three sizes priced.
Tell us which kind of space you want to add and an addition supervisor texts back within 5 minutes during business hours with a date to walk the lot.