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Project Overview

This Potomac, MD homeowner wanted to add all-season livable space to their home while expanding their outdoor entertainment options. Rather than a standard 3-season screened porch, they chose a fully equipped 4-season room — a 22 x 16 screened porch with Eze Breeze windows and Infratech radiant heaters that allows comfortable use well into the winter months, paired with an Azek deck designed for outdoor grilling and entertaining.

Design Challenge

The core challenge was the season decision — one of the most consequential choices a homeowner makes when choosing a porch over a deck. A 3-season room requires only a screening system; a 4-season room demands a heating solution, windows that can stand up to winter wind, and a structural design that supports all of it without compromising the open, airy feel the homeowner wanted. The design had to deliver full all-season functionality while still feeling like an outdoor space, not an enclosed room addition.

The Solution

Design Builders solved the season challenge by combining Eze Breeze windows with Infratech radiant heaters — two systems that work together to seal out cold air while delivering targeted, efficient warmth without forced air or ductwork. The vaulted gable roof keeps the space feeling open and architectural rather than enclosed, while the Anderson French Wood Hinged Patio Door creates a seamless transition from the home’s interior to the porch. The attached Azek deck extends the outdoor living footprint and gives the homeowner a dedicated grilling zone directly adjacent to the all-season porch.

Construction Details

All Season Room (352 sq ft)
  • Materials
    22 x 16 screened porch designed and built for 4-season use
  • Railings
    Eze Breeze windows installed on all open walls for weather protection and insulation
  • Features
    Infratech radiant heaters providing efficient, targeted warmth throughout the porch
  • Function
    Vaulted gable roof with Anderson French Wood Hinged Patio Door for interior access
Deck (240 sq ft)
  • Materials
    Azek low-maintenance PVC decking attached directly to the screened porch
  • Railings
    Dedicated grilling and outdoor entertaining area adjacent to the all-season room
  • Features
    Low-maintenance material chosen for long-term durability in Maryland’s climate
  • Function
    Deck design sized and positioned to complement the porch footprint and flow
Structural Engineering
  • Foundation
    Roof structure engineered to support the vaulted gable design and wind/snow loads
  • Framing
    Foundation and post system designed to carry both the porch and attached deck loads
  • Drainage
    Window framing and wall system built to accept Eze Breeze panel installation
  • Code Compliance
    All structures permitted and inspected to Montgomery County, MD building code requirements

Investment & Value

Project Investment:

$90,000

Return on investment:

Approximately 80% of project cost

Project Investment:

75–90%

Client Testimonials

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Choosing Design Builders was one of the best decisions we made for our home project. They were professional, reliable, and delivered high-quality work from beginning to end. The crew was respectful of our property, kept the work area clean, and paid close attention to detail throughout the build. The finished project turned out even better than we hoped, and we’re extremely happy with the overall result. We would gladly recommend them to anyone looking for quality work

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— Emma

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Really happy with the work Design Builders did for us. James and his crew were professional, organized, and delivered exactly what they promised. Our new deck looks great.

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— Eden

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We had a great experience working with James at Design Builders. He was very knowledgeable and helped us design the perfect outdoor space. The team was professional and the quality of work was excellent. I’m very happy with the result

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— Briana

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