Sunroom Additions in Bethesda and Rockville
Bring the Outdoors In, All Year Long
A sunroom is the perfect way for Bethesda homeowners to enjoy the area's beautiful springs and golden autumns while staying comfortable through humid DMV summers and cold winters. We design custom three-season and four-season sunrooms that flood your home with natural light and connect your living space to your yard. A sunroom is one of our most popular home additions, and it pairs well with a second story addition or a private ADU when you are rethinking how your home works.
We design each sunroom around the home and lot it attaches to. The mid-century homes of Bethesda and Chevy Chase often have shaded, mature backyards where a four-season room with low-E glazing captures light without overheating. The newer builds and townhomes in Rockville and the Pike District typically have tighter rear setbacks, so we size the addition carefully to Montgomery County zoning. On the larger estate lots in Potomac, we design generous conditioned sunrooms and conservatories that open to the gardens. We handle the county permits and setback approvals on every project.
Want to see glazing, flooring, and finish samples in person? Our iDesign Interior Solutions showroom is in North Bethesda's Pike District, just a 5-minute drive from Rockville Town Center, making it an easy stop for homeowners across Bethesda, Rockville, Chevy Chase, and Potomac. Plan a visit to the showroom to explore your options.
Sunroom Options We Build:
- Four-season insulated, HVAC-connected sunrooms
- Three-season screened and glass rooms
- Conservatory and solarium-style additions
- Energy-efficient, low-E glazing
- Custom flooring, lighting, and finishes
Our Sunroom Process
- 1
Site & Sun Assessment
We study your lot orientation and views to maximize light and comfort.
- 2
Design & Glazing Selection
We choose energy-efficient glass and a style that matches your home.
- 3
Permitting
We secure all Montgomery County permits and zoning approvals.
- 4
Construction
We build the foundation, structure, and envelope with minimal disruption.
- 5
Finishing & Styling
We complete interior finishes so the room is ready to enjoy.
Ready for a Sun-Filled Room?
Contact our team to design a sunroom that fits your Bethesda home and lifestyle.
Request a Consultation25+ Years Designing Sunrooms Across Bethesda and the DMV
iDesign Interior Solutions has spent more than two decades adding light-filled spaces to homes throughout Bethesda, Chevy Chase, Potomac, and the wider DMV. We understand how the region's sun angles, tree canopy, and seasonal swings affect a glass addition — knowledge that only comes from decades of building here. That local authority is why Bethesda homeowners trust us to get the orientation, glazing, and comfort exactly right.
25+
Years Serving the DMV
2,700+
Completed Projects
Year-Round
Comfort Engineering
Frequently Asked Questions About Sunroom Additions
What is the difference between a three-season and four-season sunroom?
A three-season sunroom is ideal for spring, summer, and fall and is not climate-controlled, while a four-season sunroom is fully insulated and tied into your HVAC for year-round use. In the DMV climate, many Bethesda homeowners choose a four-season room so they can enjoy it through cold winters and humid summers alike.
Do I need a permit for a sunroom addition in Montgomery County?
Yes, a sunroom addition requires permits in Montgomery County. We handle the entire permitting and inspection process, including zoning setbacks common in Bethesda neighborhoods, so your project is fully compliant.
How long does it take to build a sunroom?
Most sunroom additions take 4-8 weeks from groundbreaking to completion, depending on foundation work and whether it is a four-season build. We provide a detailed timeline during your consultation.
Will a sunroom add value to my Bethesda home?
A well-designed sunroom adds both usable living space and curb appeal, which is highly desirable in the competitive Bethesda and DMV real estate market. Buyers consistently value bright, flexible indoor-outdoor living areas.
Cost of a Sunroom Addition in the Bethesda Area in 2026
| Project Scope | Estimated 2026 Cost* |
|---|---|
| Three-season sunroomEnclosed space for spring-through-fall use without full climate control. | $25,000 – $50,000 |
| Four-season sunroomInsulated, climate-controlled room usable year-round. | $50,000 – $100,000 |
| Custom conditioned additionFully integrated room with premium glazing, HVAC, and finishes. | $100,000 – $175,000+ |
*These figures are rough planning estimates only. Your actual quote will depend on in-home measurements and the current cost of materials and labor at the time of your project, as well as the specific finishes and scope you choose. For an accurate price, schedule a free in-home consultation with our team.
Sunroom Addition Services in the DMV Area
We design and build custom sunrooms throughout Maryland, DC, and Northern Virginia, including:
Bethesda, MD
North Bethesda, MD
Rockville, MD
Potomac, MD
Chevy Chase, MD
Silver Spring, MD
Washington, DC
McLean, VA
Explore More Addition Services
What Our Clients Say
Five-star reviews from homeowners across the DMV area.
Kitchen Remodel & Custom Addition
This was our fourth project with iDesign in the past couple of years, and they impress us every time — the office responds quickly and the crews show up when promised. For our full kitchen renovation and custom addition, the showroom team explained every phase and worked in everything on our list. They even matched the paint and style of the addition to the rest of the house, something other contractors had told us was impossible.
Roger
Multi-Room Home Remodel
iDesign made our dream home happen. Coordinating separate contractors for a multi-room remodel had been a struggle, but working with one design team and their own crews took all of that stress away. Communication was excellent from start to finish across nearly 2,400 square feet of renovation — including the kitchen, which had felt overwhelming before. We are grateful to the whole team.
Man J.
Full Condo Remodel
Our condo received a stunning top-to-bottom remodel: a flawless kitchen transformation, a bathtub-to-shower conversion, popcorn ceiling encapsulation, and new recessed lighting that brightens the whole space. The craftsmanship is exceptional, and the customer service made a major renovation completely stress-free.
Elena D.
Second-Story Addition & Rental Prep
We were on a hectic timeline preparing our house as a rental before moving out of the DMV, and we could not have navigated it without iDesign. They built a custom second-story addition, replaced the kitchen backsplash, installed a new bathroom vanity, and repainted several rooms — and they connected us with a licensed architect for the DC permits, which saved us a huge headache. Their attentiveness and input were invaluable.
Rami B.
Emergency Repair & Bathroom Remodel
When water started leaking through our ceiling one morning, the iDesign team and their plumber were at our house within hours and quickly traced it to a pipe under the bathroom floor. The price they offered was so good that we ended up redoing the entire bathroom. The work was wonderful, finished quickly, and barely disrupted our routine — we would call them again without hesitation.
Claudia F.
Visit Our Showroom
Visit our showroom to explore sunroom styles, glazing options, and material finishes.
iDesign Interior Solutions · North Bethesda, MD
(301) 881-1115 · Mon–Fri 9am–6pm · Sat 9am–6pm · Sun 10am–3pm