"Loved working with Mark and his guys! Love our new sunroom even more! Mark was open and honest from the very first call, never salesy. He was a great resource in helping us finalize the design."
Eric Schuster
Verified Google Review
Maryland Sunroom Builders
Sunroom Builders Serving Central Maryland
Custom three-season and four-season sunrooms across Harford, Baltimore, Cecil, Anne Arundel, and Howard County. Designed, permitted, and built by our own crews, with a lifetime-warrantied Sunspace enclosure.
4.9 stars on Google•94 verified Google reviews•MHIC #91686
Choosing a Builder
What separates a real sunroom builder from a salesperson
Most sunroom companies in Maryland are dealers who sell you a kit and subcontract the install to whoever is available that month. That is where the problems start. The enclosure might be excellent, but the footing, the flashing, the roof tie-in, and the electrical are what decide whether the room leaks in five years.
We design, permit, and build the whole thing with our own crews. One company is responsible for the slab, the structure, the enclosure, and the finish work, which means there is nobody to point at when something needs fixing.
We wrote the longer version of this: How to spot professional sunroom workWhat to ask any sunroom company before you sign
- Are you MHIC licensed, and what is the number? Ours is 91686.
- Do your own employees do the installation, or is it subcontracted?
- Who pulls the permit and meets the inspector?
- Is the enclosure warranty from the manufacturer, and what does it actually cover?
- How do you tie the new roof into the existing one, and how is it flashed?
- Can I see finished work you built in my county?
Why Custom Design & Build
One company, start to finish
Built by Our Crews
No subcontractors. The people who design your sunroom are the people who build it.
Authorized Sunspace Dealer
Factory-trained on Sunspace engineering and warranty service, so the enclosure is installed to spec and the warranty holds.
Permits and Inspections Handled
We file the permit, meet the inspector, and coordinate electrical and HVAC. You are not managing trades.
Thirty Years in Central Maryland
Hundreds of finished rooms across five counties, and 94 verified Google reviews at 4.9 stars.
Sunroom Systems We Build
Three-season, four-season, and everything between
We are local sunroom builders in Central Maryland, and Sunspace sunrooms are modular and custom-built to install onto an existing deck, patio, or even under a roof you already have. The four models step up in comfort and season. Start with the Model 100 screen room for bug-free open air. Move up to the Model 200 WeatherMaster, our most popular, with vinyl windows that open up to 75 percent. Choose the Model 300 for a bright glass three-season room. Or go all the way to the Model 400, a fully insulated room you can use year round. We help you match the model to how you want to use the space.
- Model 100 screen room for bug-free open air
- Model 200 WeatherMaster vinyl windows, our most popular
- Model 300 bright glass three-season room
- Model 400 fully insulated for year-round use
The Sunspace Lineup
Find the right sunroom for your space
Screen Room
Model 100
A custom aluminum screen room for bug-free open-air living, upgradeable to vinyl windows.
Learn MoreWeatherMaster Sunroom (Most Popular)
Model 200
Vertical 4-track vinyl windows that open up to 75 percent, then close tight against weather and bugs.
Learn More
3-Season Sunroom
Model 300
A bright glass room on extruded aluminum, with double-roller windows that vent from both sides.
Learn More
Insulated 4-Season Sunroom
Model 400
Thermal walls, Low-E argon glass, and an optional insulated floor for true year-round comfort.
Learn MoreBacked for Life
Sunspace Limited Lifetime Warranty
Your Sunspace sunroom is covered by a limited, non-prorated manufacturer warranty. Many of the core components are warranted for as long as you own your sunroom, and our installation work is backed by the Custom Design and Build workmanship guarantee.
Lifetime
Laminations & Finishes
Expanded polystyrene panels are warranted free of blistering, chipping, cracking, peeling, and delamination for as long as you own your sunroom.
Lifetime
Window & Door Glass Breakage
Tempered glass units in windows and doors are warranted against breakage in residential use for as long as you own your sunroom.
Lifetime
Vinyl Extruded Components
Warranted free from peeling, flaking, blistering, and corroding for as long as you own your sunroom, under normal residential use.
Lifetime
Hardware & Screen Units
Door rollers, latches, moving parts, other hardware, and screen units are warranted for as long as you own your sunroom.
15-Year
Insulating Glass Units
Insulated glass units are warranted for 15 years from installation against seal failure that causes permanent fogging between the glass.
10-Year
Vinyl Glazed Windows
Vinyl glazed windows are warranted for 10 years from installation against fading and cracking, provided the cleaning instructions are followed.
The fine print
This limited warranty is provided by Sunspace Modular Enclosures Inc., the manufacturer, to the original purchaser, and covers materials and factory workmanship. Coverage is limited to repair or replacement of any Sunspace-manufactured component found to be defective within the periods above. If repair or replacement is prohibitively costly, the manufacturer may instead refund the purchase price of the claimed product.
Not covered: existing site conditions, and workmanship or materials supplied or completed by others. Materials not manufactured by Sunspace are not covered. Vinyl extruded components are not warranted against discoloration caused by air pollution, harmful chemicals, or normal weathering and fading from the elements.
Vinyl is not glass and needs gentle care. Do not use harsh cleaners, detergents, or any formula containing bleach. Following the Sunspace cleaning instructions is required to keep the 10-year vinyl glazed window coverage in effect.
Sunspace is not responsible for indirect, punitive, special, incidental, or consequential damages. This warranty does not apply to products damaged or found defective due to improper handling, operation, or maintenance, or due to site conditions or work by others. Ask us for the full written warranty terms for your model.
Recent Projects
A few of our recent sunroom builds
Investment Guide
Plan the right room for your budget
What Homeowners Say
Real feedback from Maryland homeowners
"We started with a wooden deck and screened enclosure that was rarely used and ended up with a beautiful composite deck and sunroom that we enjoy daily. We greatly appreciate the skilled craftsmen."
Deborah Thomas
Verified Google Review
"Mark was fantastic to work with from start to finish. He's incredibly knowledgeable and took the time to explain everything clearly. The entire experience was smooth, professional, and exceeded our expectations."
Brandon Herd
Verified Google Review
Help Me Choose
Common questions, clear answers
Learning Center
Sunrooms & Three-Season Rooms guides
Covered Deck
Snow & Ice Damage to Sunrooms and Porches: Prevention, Safe Removal, and Why Professional Construction Matters
Winter Weather Guide Snow & Ice Damage to Sunrooms and Porches: Prevention, Safe Removal, and Why Professional Construction Matters Harford, Baltimore & Cecil Counties • 12 min read Maryland Winter Storm Alert Recent heavy snowfall has tested outdoor structures across the region. Learn how to protec
Sunrooms
How to Spot Professional Sunroom Work
A sunroom should be a bright, comfortable extension of your home—a space where you can enjoy natural light and outdoor views without battling the elements. But not all sunroom installations deliver on that promise. Some start leaking within the first year. Others struggle with temperature control—th
Sunrooms
Can You Heat a Three-Season Room? What Maryland Homeowners Need to Know
Can You Heat a Three-Season Room? A Maryland Homeowner's Guide Understanding your options for extending the comfort of your three-season room into colder months—and when a different approach might serve you better. If you have a three-season room, you've probably wondered whether you could heat it d
Porch Roofing
Permit & Zoning Checklist for Building a Three-Season Room in Harford County
Thinking about adding a three-season room to your home in Harford County? It’s an exciting upgrade—extra space, fresh air, and a perfect spot to relax without the bugs. But before you start dreaming about furniture layouts and ceiling fans, there’s a less glamorous (but absolutely critical) step to
Screen Rooms
What’s the Difference Between a Sunroom and a Three-Season Room? (And Which is Better for Maryland Homes?)
If you're thinking about adding more light and space to your home, chances are you’ve come across two popular options: the sunroom and the three-season room. Both let you enjoy the beauty of the outdoors without the bugs, rain, or blazing sun—but they’re definitely not the same thing. So what’s the
Porch Roofing
Can You Use a Three-Season Room Year-Round in Maryland?
Three-season rooms are a popular upgrade across Harford County—especially in places like Bel Air, Fallston, and Jarrettsville where folks love the outdoors but don’t always love the weather that comes with it. These rooms are designed to give you a peaceful, protected space for most of the year̷
Ready to Build?
Let's talk about your outdoor space.
Start with a free phone conversation. We'll learn about your project, answer your questions, and help you understand what's possible. No pressure, no high-pressure sales tactics.
4.9 stars on Google • 94 verified Google reviews • MHIC #91686 • Locally owned and operated
Service Area
Sunroom Builders Serving Harford, Baltimore, Cecil, Anne Arundel & Howard County
We are local sunroom builders based in Fallston, Maryland. As an authorized Sunspace dealer with MHIC #91686 and 30+ years of outdoor living experience, we design and install sunrooms across Harford, Baltimore, Cecil, Anne Arundel, and Howard County, including Bel Air, Forest Hill, Fallston, Aberdeen, Havre de Grace, Joppa, Jarrettsville, Edgewood, Towson, Cockeysville, Perry Hall, White Marsh, Elkton, North East, and Chesapeake City. If your town is not listed, reach out and we will let you know if we cover your area.