About us
A family business, in the literal sense.
NKO Sunrooms is Ivan Kostenko and Lyudmila Kostenko, a husband-and-wife team based in Jacksonville and the authorized Sunspace dealer for Northeast Florida.
One crew of two
Most contractors send a salesperson to quote and a crew to build. At NKO, the person who measures your porch is the person who installs your windows. Ivan handles the site work, Luda keeps manufacturing and scheduling on track, and you always know exactly who to call.
It shows in the reviews
Homeowners mention being kept informed through manufacturing and shipping, installs finishing on their schedule, and the same faces at the estimate and the install.
NKO Sunrooms LLC is BBB-accredited and holds a 5.0-star rating across 19 Google reviews.
At a glance
- Owners
- Ivan Kostenko & Lyudmila Kostenko
- Based in
- Jacksonville, FL
- Dealer for
- Sunspace Sunrooms (WeatherMaster systems)
- Accreditation
- Better Business Bureau, since 2024
- Service area
- Jacksonville, St. Johns, Nocatee, Fleming Island, Green Cove Springs, Yulee, Fernandina Beach, Orange Park, Ponte Vedra, Middleburg
- Hours
- Monday to Saturday, 8am to 6pm
Free on-site estimate
Ready to use your porch again?
Ivan will measure your openings, walk you through the options, and quote the project on the spot. No pressure, no follow-up calls.
Serving Jacksonville, St. Johns, Nocatee, Fleming Island, Green Cove Springs, Yulee, Fernandina Beach, Orange Park, Ponte Vedra, Middleburg and surrounding Northeast Florida.