Porch Enclosures · Jacksonville, FL
Your porch, without
the weather.
NKO Sunrooms turns screened porches into three-season rooms with Sunspace WeatherMaster windows and doors, measured, built, and installed by the family whose name is on the truck.
5.0 across 19 Google reviews
- 5.0 stars · 19 Google reviews
- Family-owned and operated
- Authorized Sunspace dealer
- BBB-accredited since 2024
The porch problem
Florida gives you a porch.
Then takes it back.
Sideways rain
Summer storms blow straight through the screen.
March pollen
A yellow film on every chair and cushion.
Noseeums
They own the porch at dusk, right when you want it.
Sunspace WeatherMaster windows change that: custom-sized vinyl sliders that seal the porch against weather, then slide open to 75 percent screen when the evening is worth letting in. It is the three-season room approach: a fraction of the cost of a glass sunroom addition, built over your existing porch in days instead of months.
What we do
Four ways to get your porch back.
How it works
From first call to first coffee out there.
Four steps, two people, one name on everything. Click through what happens after you call.
The free estimate
It starts with Ivan on your porch with a tape measure, not a salesperson with a slideshow. He measures every opening, talks through slider and tint options, and answers the questions you actually have.
Before he leaves you have a real number for the whole project. It costs nothing, takes about an hour, and nobody calls you three times a week afterward.
- On-site, about an hour
- Whole-project quote on the spot
- Usually no construction permit needed
Built to your measurements
Nothing here comes off a shelf. Sunspace manufactures every WeatherMaster window and door to the exact measurements Ivan took, so panes seat square in your openings instead of being shimmed into standard sizes.
While your windows are being built, Luda keeps you posted on manufacturing and shipping. Reviewers mention it constantly: you always know where your project stands.
- Custom-manufactured by Sunspace
- Clear or tinted glazing
- Updates at every stage
Installed by the owner
The person who quoted your porch is the person who installs it. Ivan sets every pane, seals every frame, and most installations finish in a few days, on the schedule you agreed to.
No subcontractors, no rotating crew, no surprises at the walkthrough. The name on the estimate is the name on the caulk gun.
- Owner-installed, start to finish
- Most jobs done in days
- Clean site at handoff
Your porch, all year
Wind, rain, pollen, and noseeums stay outside. Slide the panes open to 75 percent screen on the good evenings, seal them tight when the weather turns, and use the room you have been walking past for years.
That is the whole point of the project: not windows, but mornings with coffee out there in January.
- Usable in every season
- Opens to 75% screen
- A room, not a hallway
Google reviews
5.0 stars. 19 reviews. Zero asterisks.
Every quote is a real Google review from a Northeast Florida homeowner.
★★★★★
“We couldn't be happier with the work Ivan did on our porch. He enclosed our screened porch with vinyl porch windows and installed a new door.”
NKO Sunrooms holds a 5.0-star rating across 19 Google reviews.
★★★★★
“Outstanding installation timeliness and communication, very happy with the job Ivan and his crew did.”
★★★★★
“Great price. Extremely professional, quality work. Highly recommend to everyone!”
NKO Sunrooms is a family-owned business: owners Ivan and Lyudmila Kostenko handle every estimate and installation themselves.
★★★★★
“NKO Sunrooms installed Sunspace WeatherMaster windows on our screen porch. We have WeatherMaster windows installed in another property and had been waiting for a Sunspace dealer in North Florida for almost two years.”
★★★★★
“Ivan did a wonderful job on his patio screening project for us. He was courteous, knowledgeable and precise. We couldn't have been happier with the final product and it was reasonably priced. If we need further workmanship on another project, we won't hesitate to call Ivan.”
★★★★★
“Absolute killer business. They walked through every step, answered my questions and kept me informed on the manufacturing and shipping of the custom windows. Windows were installed quickly and on my schedule with great attention to detail. Highly recommended!”
NKO Sunrooms LLC has been accredited by the Better Business Bureau since July 2024.
★★★★★
“I was able to work with NKO Sunrooms with the Sunspace Window system. Very satisfied with the process and quality of products.”
★★★★★
“Ivan converted our screenroom to a sunroom. We LOVE it. We installed a small AC unit and heater and plan to enjoy our 3 season room year round. Its a very nice 20x20 sunroom and our dogs love it as much as we do. THANKS IVAN”
★★★★★
“We were very pleased with Ivan's professionalism and dedication. He communicated on a regular basis on schedules. We would highly recommend NKO Sunrooms for this type of project.”
★★★★★
“Where can you get sales of a good window system and installation by the same husband & wife team in this day and age. Ivan & Luda were the nicest hard working & professional team that you don't often encounter these days.”
NKO Sunrooms serves 10 communities across Northeast Florida, from Jacksonville to Fernandina Beach.
★★★★★
“We couldn't be happier with the work Ivan did on our porch. He enclosed our screened porch with vinyl porch windows and installed a new door.”
NKO Sunrooms holds a 5.0-star rating across 19 Google reviews.
★★★★★
“Outstanding installation timeliness and communication, very happy with the job Ivan and his crew did.”
★★★★★
“Great price. Extremely professional, quality work. Highly recommend to everyone!”
NKO Sunrooms is a family-owned business: owners Ivan and Lyudmila Kostenko handle every estimate and installation themselves.
★★★★★
“NKO Sunrooms installed Sunspace WeatherMaster windows on our screen porch. We have WeatherMaster windows installed in another property and had been waiting for a Sunspace dealer in North Florida for almost two years.”
★★★★★
“Ivan did a wonderful job on his patio screening project for us. He was courteous, knowledgeable and precise. We couldn't have been happier with the final product and it was reasonably priced. If we need further workmanship on another project, we won't hesitate to call Ivan.”
★★★★★
“Absolute killer business. They walked through every step, answered my questions and kept me informed on the manufacturing and shipping of the custom windows. Windows were installed quickly and on my schedule with great attention to detail. Highly recommended!”
NKO Sunrooms LLC has been accredited by the Better Business Bureau since July 2024.
★★★★★
“I was able to work with NKO Sunrooms with the Sunspace Window system. Very satisfied with the process and quality of products.”
★★★★★
“Ivan converted our screenroom to a sunroom. We LOVE it. We installed a small AC unit and heater and plan to enjoy our 3 season room year round. Its a very nice 20x20 sunroom and our dogs love it as much as we do. THANKS IVAN”
★★★★★
“We were very pleased with Ivan's professionalism and dedication. He communicated on a regular basis on schedules. We would highly recommend NKO Sunrooms for this type of project.”
★★★★★
“Where can you get sales of a good window system and installation by the same husband & wife team in this day and age. Ivan & Luda were the nicest hard working & professional team that you don't often encounter these days.”
NKO Sunrooms serves 10 communities across Northeast Florida, from Jacksonville to Fernandina Beach.
Free on-site estimate
Ready to use your porch again?
Send your porch details and Ivan will come measure, walk you through the options, and quote the whole project on the spot. No pressure, no follow-up calls.
(904) 490-0560Monday to Saturday, 8am to 6pm · prefer to talk? Just call.
Serving Jacksonville, St. Johns, Nocatee, Fleming Island, Green Cove Springs, Yulee, Fernandina Beach, Orange Park, Ponte Vedra, Middleburg and surrounding Northeast Florida.