What is the difference between a sunroom, a three season room & a screened porch?

A screened porch uses screen panels for open air living in the warm months. A three season room adds windows, which stretches the usable period from spring through fall. A four season sunroom is fully insulated & climate controlled for year round use. All Under One Roof builds all three, & the right choice depends on intended use & budget.

What is a four season room?

A four season room is a sunroom built like a room addition: an insulated floor, walls & roof, insulated Low E glass, & heating & cooling from the house system or a dedicated mini split, so it is used year round & counts as heated square footage. A three season room uses lighter glazing & limited conditioning & is used from spring through fall.

Is it cheaper to build a sunroom or a full addition?

A sunroom is usually less expensive per square foot than a conventional framed addition, because the structure is lighter & the walls are largely glass, while still adding comfortable, light filled square footage. For a fully conditioned year round room the gap narrows considerably, & All Under One Roof sets out those trade offs plainly during the consultation.

Does a sunroom or screened porch need a permit?

Yes. A sunroom or enclosed porch is a structural addition & requires a building permit, & usually electrical & footing inspections as well. All Under One Roof is a licensed Kansas City general contractor & handles permitting, engineering coordination & inspections, so the addition is built to code & safe to enclose.

Sunrooms & Four Season Rooms

Fully Licensed & Insured

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Overview

Sunroom additions & four season rooms in Kansas City

All Under One Roof builds sunroom additions, four season rooms & three season rooms throughout the Kansas City metro. The distinction matters before design begins: a three season room stretches spring & fall with glass but limited conditioning, while a four season room is insulated, conditioned & counts as heated square footage, which changes the foundation, the framing & the permit. Every sunroom project starts by settling that question against how the room will actually be used.

Glazing, insulation & HVAC specified together

Sunroom construction covers engineered foundations, insulated wall & roof assemblies, low emissivity glazing sized for solar gain & orientation, roof tie ins that shed water correctly into the existing system, & HVAC extension or dedicated mini split capacity for four season rooms. All Under One Roof also converts existing screened porches into three season rooms where the original structure was framed to carry it.

What a four season room needs

An engineered foundation, the same as any room addition
Insulated floor, wall & roof assemblies
Insulated Low E glass sized for sun & orientation
Heating & cooling from the house system or a dedicated mini split
A roof tied into the existing roofline & flashed

A sunroom that is uncomfortable half the year was specified, not built, incorrectly.

Four season room, three season room or screened porch

The three sit on the same kind of foundation & roof. They differ in what fills the walls & how the room is heated & cooled:

Screened porch: screen panels, no glass & no conditioning, used in the warm months
Three season room: windows or glass panels with limited insulation & conditioning, used from spring through fall
Four season room: insulated floor, walls & roof, insulated glass & heating & cooling, used year round & counted as heated square footage

Orientation & glass

Which way the glass faces decides how the room behaves. South & west facing glass gathers the most heat on summer afternoons & the most sun in winter, so it needs low emissivity glass & often a solid insulated roof or an overhang to keep summer heat out. A north facing sunroom stays cooler & needs less shading, but gains little warmth in winter. Glass area, glass type & roof design are set against the orientation before the room is drawn.

Turning a porch or deck into a sunroom

An existing screened porch or deck can become a sunroom when its footings & framing can carry the walls, the glass & the roof. A screened porch framed for it can be enclosed as a three season room. A deck usually needs new footings & an insulated floor before it can become a four season room, so the existing structure is opened & checked before design. On an Overland Park project, All Under One Roof took a sunroom floor back to the slab, prepped it flat & repaired the cracks before the new floor went down, because a sunroom slab sees bigger temperature swings than the floors inside the house.

Sunroom permits

A sunroom is a structural addition, so it needs a building permit & usually footing & electrical inspections as well. A four season room that is heated & cooled is reviewed like any other room addition, including its insulation & energy code requirements. All Under One Roof prepares the drawings with the licensed AIA architect & professional engineer on staff, pulls the permit & schedules each inspection.

Designed, permitted & built by one firm

All Under One Roof is licensed in Kansas & Missouri, carries a $2,000,000 liability insurance policy & brings 32+ years of combined construction experience to every sunroom.

Starting a sunroom project

Every project starts with the consultation request form. Photos of the side of the house where the sunroom would go, rough measurements, which way that wall faces & how the room will be used make the first call more useful. A site visit, design work or a detailed estimate is billed at $85 an hour under a consultation agreement; owner supplied photos, measurements or drawings can be reviewed without a site visit.

Key Service Points

Screened porches, three season rooms & four season sunrooms
Proper footings & clean roof tie ins to the existing structure
Window, screen & insulation packages matched to intended use
Designs that match the existing lines & finishes of the house
Usable living space at a fraction of full addition cost
Permits & inspections handled by All Under One Roof
One accountable design build team from concept to completion

Project Guarantees

Licensed, insured crews on every porch & sunroom build
Transparent, detailed estimates before any construction begins
Structural work engineered & built to code
Premium materials backed by robust warranties

Project Showcase

Our Process

Initial site assessment & detailed project consultation
Comprehensive estimating & transparent budget approval
Architectural planning & structural code review
Municipal permit acquisition & scheduling logistics
Precise physical construction with daily site supervision
Final meticulous walkthrough & warranty documentation

All Under One Roof

Licensed Professionals On Staff

All Under One Roof employs its own licensed AIA architect & professional engineer rather than subcontracting design & engineering to outside firms. Architecture, engineering, & construction are handled in house by one accountable team, from initial concept through to the one year walk through.

Bryan — Owner

Director of External Operations & Structural Builds

On Our Staff — Employed by AUORKC

Licensed AIA Architect

On Our Staff — Employed by AUORKC

Licensed Professional Engineer (PE)

Service At a Glance

CategoryExterior Services

Quick Links

Client Feedback4.9★ across 116 client reviews on Houzz ↗

"We recently purchased a new home in Spring Hill, Kansas. We wanted to enlarge our deck with a grilling platform, add steps down to the backyard and screen in the deck. Bryan and hi..."

— Jeff AVerified on Houzz ↗

"Bryan did an excellent job. He was on time to meet with us and then followed up to make sure they had everything we wanted done planned. We were under a fairly short time frame, ab..."

— Robert Pickrell · October 2025Verified on Houzz ↗

Frequently Asked Questions

Size, foundation, glazing & insulation drive the number, but the biggest factor is whether the room is a three season space or a fully conditioned four season sunroom, because that decision changes the footings, the framing & the permit. A screened porch is the least expensive of the three. The consultation process produces an exact figure, with every line item set out before work begins.

Recent Google Reviews

See What Our Customers Have To Say

The latest reviews from our Google profile.

"From the initial consultation to the final touches, Brian with All Under One Roof provided an exceptional remodeling experience. Their professionalism was evident in their clear communication, punctuality, and meticulous attention to detail throughout the entire project. The team was skilled, respectful of our home, and consistently went above and beyond to ensure our vision was brought to life flawlessly. We are absolutely thrilled with the results and highly recommend their services to anyone looking for a reliable, high-quality remodeling contractor."

— Carey Barton

Google review · 2025-04-03

"All under one roof did a great job on my deck. From start to finish. From planning to execution they did a fantastic job and I wouldn't hire anyone else for any future work that I have."

— Grant Summers

Google review · 2025-03-03

"I have worked with Bryan on two major projects involving two deck replacements and the work was excellent. He has done several other improvements for me that were outstanding. He cares and is so knowledgeable with every project. I know I can always count on him."

— Carol Caraway

Google review · 2025-03-05

"In 2015 I had used this company for a gazebo, deck stone columns and railing. It was a job well done, recommend them highly!"

— anucia joseph

Google review · 2025-03-13

"Wonderful job on our deck!"

— Diana Stoppelmoor

Google review · 2025-03-14

"Excellent craftsmanship!"

— Deborah Manning

Google review · 2025-02-27

"We love working with Bryan! High quality and honest! You won't be disappointed if you choose to work with Bryan and All Under One Roof!! Thanks Bryan"

— Michael Hale

Google review · 2025-03-17

"I have been following Bryan and Andrea for many years and can attest to the superior quality and attention to detail! They are the bomb!!"

— lynda delap

Google review · 2025-03-01

"All Under One Roof has done three major projects for me over the years. All have been done with great care and attention to detail."

— Susan Robinson

Google review · 2025-03-08

"All Under One Roof has helped me with a basement build and now again with a cabin build. I can safely call myself a lifetime client. I appreciate the integrity, transparency, and flexibility they have demonstrated. These are the types of partners I want to work with when jumping into a construction project."

— Shawn Wilkinson

Google review · 2026-01-31

"I can't say enough good things about this company! Bryan and his team are creative, problem solving, and people first oriented. Despite the fact that we did not budget nearly enough for our specific project, the team at All Under One Roof tried their hardest to make things work and they delivered through communication, specs, and consultation (and great price for the services rendered). We will be using this company in the future."

— Andrew Penner

Google review · 2026-10-08

"All Under One Roof did a great job on our one day project which involved removing an old JennAir downdraft cooktop and installing a new Hauslane built-in range hood and KitchenAid gas cooktop. They installed the hood into our existing cabinetry and vented it to the outside of the house. Very happy with the results."

— Calvin Downing

Google review · 2026-01-26

"Since a picture speaks a thousand words, I really don’t need to write a review. But I will say this is the 3rd project we’ve done in 7 months with AUOR, and the 3rd time we’ve been blown away by the end result. Our primary bath remodel was on time, on budget and on point. Bryan and Andrea are fantastic to work with. Their professionalism and craftsmanship are second to none. 100% recommend!"

— L M

Google review · 2026-04-24

"Too bad we can only give 5 Stars. All Under One Roof deserves a lot more. We asked to have a sliding glass door and a regular exterior door replaced and sealed (to prevent water intrusion). While doing the work AUOR discovered water damage that was covered up by a previous contractor (for the previous owner of our home) and investigated until the full extent of the structural damage was uncovered and repaired correctly. Bryan and his team are experts and it showed. They made sure our home was safe and structurally sound. AND, they communicated with us every step of the way. AND, all of the damages and repairs were documented which helped us recoup costs in the aftermath of these surprise findings. I wish all contractors were as ethical and competent as Bryan and the AUOR team!"

— Brenda Smith

Google review · 2026-02-03

"The team did great work on re-designing and replacing two large decks we have, fixing dry-rot hidden by the old decks, repainted all of the buildings, and did some stone work. The team was very professional, working 6 days a week and the work quality was top-notch. Bryan and Andrea were both very communicative and clearly had our best interests, as their clients, in the front of their mind always. Looking forward to doing future projects with them!"

— Phil McClendon

Google review · 2025-10-28

"Working with All Under this holiday weekend was a joy — appreciative, kind, and a pleasure from start to finish. Customers like him are why we love what we do and stay open. Highly recommend!"

— Alexandra Wolfe

Google review · 2026-07-03

"All Under One Roof has done four large projects for us. One was an extensive interior project that involved wall removals and a complete first-floor renovation, and another was an interior renovation on a lake cabin. Two were exterior projects that included upstairs decks, ground-level patios, staircases, and fire pits. In each case, AUOR worked closely with us before and throughout the projects to determine and meet our project needs and goals. They communicated constantly throughout the projects and were very responsive to what we wanted and needed. The end results are perfect! I highly recommend All Under One Roof!"

— Lauranne Hess

Google review · 2026-03-15

"Bryan and his crew are total pros. Always on time, work is perfect, cleaned up when done, and communication is excellent. I'm on house #6 and have a long time span of working with builders and contractors. Considering this, I'd rank All Under One as a top tier provider in customer support and quality of work, without question. Every one of his team knew what they were doing and wasted zero time getting projects done. Even more rare, they are all FRIENDLY. I highly recommend this firm."

— chuck cannata

Google review · 2025-08-18

"From the very beginning, Bryan demonstrated exceptional professionalism and support in helping me outline the plans, materials, and timelines for my deck remodel. He was responsive to all inquiries and took the time to walk me through multiple scenarios to ensure the project was completed to the highest standard. Even when I initially intended to complete the work myself, Bryan generously offered practical advice and guidance, highlighting key considerations and potential challenges throughout the process. When I ultimately decided to bring in professional help, Bryan and his team responded promptly—arriving the very next day—and completed the project with impressive speed and efficiency. His crew was courteous, thorough, and respectful of my property, leaving the backyard clean and safe for both my children and pets. Their attention to detail and customer care truly stood out. I highly recommend Bryan and his team for any interior or exterior renovation project. Their expertise, reliability, and commitment to quality are second to none."

— Seth Alden

Google review · 2025-10-22

"All Under One Roof has done multiple large projects for me. They are fast, responsive, creative when needed, and communicative. I trust them to do a great job no matter the project."

— Mike Frymyer

Google review · 2026-01-25

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