How we work
Designed to belong, then built once, built right
- Rooflines and finishes matched to the existing home
- Designed and permitted before ground breaks
- Planned around how the new space meets the old
Everything your home addition needs, under one roof
Design & Permitted Plans
Design & Permitted Plans
Designed to flow, permitted before groundbreak.
Foundation & Footings
Foundation & Footings
Sized to the addition and your soil.
Framing & Structure
Framing & Structure
Tied into the existing structure, to code.
Roofline Tie-In
Roofline Tie-In
Meets your existing roof cleanly.
Electrical, Plumbing & HVAC
Electrical, Plumbing & HVAC
Extended in, sized for the whole house.
Insulation, Drywall & Finish
Insulation, Drywall & Finish
Finished to match the rest of the home.
What we build
Types of Additions We Build
Four ways to add the space you need, each engineered to tie into your existing home so the new work reads as original construction.
Room additions
extra bedrooms, family rooms, and living space on a new foundation
Bump-outs
extending an existing kitchen, bath, or room a few feet for more space
Second-story additions
building up where the lot won't allow building out
In-law suites & ADUs
accessory dwelling units with their own bath, kitchen, and entry
Explore in-law suitesarrow_forwardBuilding entirely new instead of adding on? See our custom home builder page. Renovating the rest of the home too? See home remodeling.
Your options
Three ways to build it
Every tier is built to the same standard. The difference is materials and finish level, never the quality of the work or the care in the design.
Good
Builder-grade, beaten
A sound, well-built addition with standard finishes, clean structural and roofline tie-ins, and a layout designed around the room’s purpose.
What's included
- checkNo design revisions
- checkSend us your inspiration photos. We build toward them as best we can
- checkLight selection guidance, focused on keeping you on budget
Better
Most popularThe sweet spot
Upgraded windows, trim, and finishes, with more custom layout and detailing where it counts.
What's included
- checkOne design revision
- checkHands-on selection support, we help you choose materials and finishes
Best
No compromises
High-end finishes, premium windows, and custom built-ins, detailing that makes the addition read like original construction.
What's included
- checkUnlimited design revisions
- checkWork one-on-one with a designer
- checkFull white-glove selection support, start to finish
All tiers include a full scope in writing, one accountable builder, and no-surprise billing. The price you approve is the price you pay.
A quick gut-check
Are we the right fit?
thumb_upA great fit
- A full home addition, done right the first time.
- Scope, schedule, and price in writing first.
- One builder accountable for the whole job.
infoNot the best fit
- A quick patch instead of the whole job.
- Skipping permits and inspections.
One written scope. One builder accountable. The first step is a Project Blueprint.
The Project Blueprint
Know your home addition before you commit
For $297, a licensed professional studies your home addition and hands you a written read:
- Feasibility and recommendations
- Risk assessment
- Renderings
- A real budget range
Free phone consultation first. Your $297 credits 100% toward the project.
auto_stories A real brief we produced for a Midlands homeowner, flip through it.
A real Chonko Construction project brief, drag a corner to turn the page, or tap "View larger" to read it full-size. (Names and address are samples.)
What you walk away with
What's inside your Blueprint
Scope, design direction, and a budget to plan around. Not a quote, the map.
Your ballpark project cost
- checkA range by scope & tier
- checkSized to your finishes
- checkA real number to plan around
What's behind the walls
- checkPlumbing & electrical realities
- checkWhat the layout can and can't do
- checkSurprises flagged before demo
Design direction & selections
- checkLayout & flow options
- checkFinish & material direction
- checkA look you can picture
Preliminary budget & allowances
- checkRough finish & fixture allowances
- checkBuilt for planning & financing
- checkA ballpark, not a fixed quote
Timeline & project roadmap
- checkA phase-by-phase schedule
- checkHow long you're without the space
- checkThe path to done
Tailored to your home
- checkYour home, your rooms
- checkYour must-haves priced in
- checkOne clear plan to decide on
The Project Blueprint is $297, and every dollar credits 100% toward your build.
Blueprint figures are a preliminary ballpark for planning, not a fixed quote. Your locked scope, schedule, and price come with your written Chonko Construction contract, after design.
Our Process
How your home addition comes together
From the first call to the final walkthrough, one builder, one written plan, no guesswork.
- forum1
Free Consultation
Start with a free phone consultation. Tell us what you’re picturing, and we’ll tell you straight whether it’s a fit, at no charge.
- architecture2
Your Project Blueprint
For $297, a licensed professional visits and hands you a written read on your project: whether it’s feasible, what it costs as a planning range, and what could blow the budget. It credits 100% toward your build.
- description3
Design & Written Price
We design the space and put the full scope, schedule, and firm price in writing, agreed before any work starts. No vague bids, no "we’ll figure it out as we go."
- event_available4
Approve & Schedule
You sign off on the plan and the number. We lock in materials, pull the permits, and set a real start date.
- construction5
Build & Communicate
One licensed builder runs the whole job and keeps you in the loop at every phase. No chasing subs, no surprises on the invoice.
- verified6
Walkthrough & Warranty
We finish with a full walkthrough against the scope you approved, then back the work with a named workmanship warranty.
- forum1
Free Consultation
Start with a free phone consultation. Tell us what you’re picturing, and we’ll tell you straight whether it’s a fit, at no charge.
- architecture2
Your Project Blueprint
For $297, a licensed professional visits and hands you a written read on your project: whether it’s feasible, what it costs as a planning range, and what could blow the budget. It credits 100% toward your build.
- description3
Design & Written Price
We design the space and put the full scope, schedule, and firm price in writing, agreed before any work starts. No vague bids, no "we’ll figure it out as we go."
- event_available4
Approve & Schedule
You sign off on the plan and the number. We lock in materials, pull the permits, and set a real start date.
- construction5
Build & Communicate
One licensed builder runs the whole job and keeps you in the loop at every phase. No chasing subs, no surprises on the invoice.
- verified6
Walkthrough & Warranty
We finish with a full walkthrough against the scope you approved, then back the work with a named workmanship warranty.
Serving Columbia & the Midlands
© OpenStreetMap contributors © CARTO
Frequently Asked Questions
What is the difference between a bump-out and a full home addition?add
A bump-out extends an existing room a few feet (a larger kitchen or bathroom) without a full foundation. A full addition adds entire new rooms or a second story on its own foundation. Chonko Construction builds both as design-build projects in Columbia and the Midlands.
How much does a home addition cost in Columbia, SC?add
Addition cost depends on size, foundation, and finish. A bump-out costs far less than a full second story. Every Chonko Construction project starts with a written scope, schedule, and price before work begins. Typical Midlands ranges are published in our home addition cost guide.
How do I find out if my addition is feasible and what it will cost?add
Start with a Project Blueprint. For $297, a licensed professional visits your home and delivers a written feasibility read (setbacks, structure, and tie-ins) plus a risk assessment and a preliminary budget range. The $297 credits 100% toward your addition if you build with us.
Do I need a permit for a home addition in Richland County?add
Yes, home additions require building permits and inspections. As a licensed home builder, Chonko Construction handles the permits and inspections for additions across Richland and Lexington County as part of the project.
Can you match a home addition to my existing house?add
Yes. Chonko Construction designs additions to match the existing home (rooflines, siding, brick, and trim) so the new space looks original, not added on. This is a core part of our design-build process.
Related Guides
What Does a Home Addition Cost in the Midlands?
by addition type.
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Start Your Home Addition
Free phone consultation
Talk through your home addition
A quick, no-pressure call to scope the work and answer your questions. Pick a time below and we will call you then.
- check_circleA licensed builder on the phone, not a call center
- check_circleWe scope the project and talk through your options
- check_circleIt books straight onto our calendar, no estimate pressure