Charleston, SC
Home Additions That Feel Like They Were Always There
Need more space? JTB Construction builds additions that match your home's style, meet local code, and are built to last in the South Carolina climate.
Get a Free QuoteTypes of Additions We Build
Adding on to an existing home is more complex than new construction — it requires matching existing materials, tying into existing systems, and maintaining structural integrity. JTB has the experience to do it cleanly.
- Room additions (bedroom, living room, office)
- Master suite additions
- Garage conversions and enclosures
- Sunrooms and enclosed porches
- Second-story additions
- In-law suites
- Mudrooms and laundry room additions
Built for the Charleston Climate
Additions in the Lowcountry need to handle humidity, heat, and occasional severe weather. We use materials and techniques that hold up to South Carolina's climate — and we build to local code for permitting and resale peace of mind.
Common Questions
How much does a home addition cost in Charleston?
Cost varies widely based on size, foundation work, and finish level. Simple sunroom or porch enclosures often start in the high five figures; full master suite or second-story additions can run well into six figures. We give you an itemized quote so you understand what's driving the cost.
How long does an addition take from start to finish?
Most additions run 12–20 weeks from break-ground to final finish, depending on scope, weather, and permit timing. We give you a realistic schedule up front and keep you updated weekly.
Will you handle permits and HOA approvals?
Yes. We pull all required permits with the relevant Charleston-area municipality and handle inspections. If you're in an HOA neighborhood, we'll work with you on the architectural review submission so you don't have to navigate it alone.
Can you tie a new addition into my existing roofline and exterior?
That's the goal on every addition we build — it should look like it was always there. We match siding, roofline pitch, trim profiles, and window styles so the addition reads as part of the original home, not a tacked-on box.
Let's Talk About Your Addition
Get a free consultation and quote. Tyler and Blake serve Charleston, Summerville, Mount Pleasant, and the surrounding Lowcountry.
Get a Free QuoteServing Charleston, Summerville, Mount Pleasant, Goose Creek, North Charleston, Ladson, Hanahan, Johns Island, James Island, and Moncks Corner — within 100 miles of Charleston, SC.