Enclosed Comfort for Bug-Free, Breezy Living

Screened-In Porches & Sunrooms in New Hampshire

Built for New Hampshire Weather

Comfort and Coverage from Spring to Winter

Our screened-in porches and sunrooms are designed to handle New Hampshire’s temperature swings and seasonal moisture. We frame every enclosure with pressure-treated or cedar wood, composite decking, and aluminum or fiberglass mesh to ensure long-lasting resistance to wind, rain, and snow. For four-season sunrooms, we include energy-efficient windows, insulated walls, and climate-ready flooring — so you can use the space even when it’s below freezing. From rustic to modern, each porch is styled to complement your home’s exterior.

What Goes Into Our Porch & Sunroom Builds

Enclosure Materials, Framing, and Screen Options

We offer both fully enclosed sunrooms and open-air screened porches, each custom-built to meet your layout and use goals. Our team provides complete design services and structural framing built to New Hampshire code. You can choose from full-view fixed screens, removable panels, or retractable systems — along with optional skylights, ceiling fans, or electrical hookups. Whether your goal is weekend relaxation or daily use, we help you select the right mix of screen types, roofing styles, and enclosure materials.

Aluminum, fiberglass, or pet-resistant mesh

Vinyl windows or energy-efficient glass

Low-maintenance composite or wood framing

Custom screened-in porch with cedar framing and composite floor in New Hampshire

Conversions, Upgrades & Add-On Builds

From Open Porch to Enclosed Retreat

Have an existing deck or open porch? We can convert it into a fully enclosed screened-in room or sunroom addition. Our team evaluates your structure, reinforces framing if needed, and then installs screen walls, headers, and roofing to match. Want more comfort? We can insulate the walls, add windows, and upgrade it to a three- or four-season sunroom. From retrofitting older porches to expanding your layout, our conversions deliver comfort and function without starting from scratch.

Sunroom with insulated windows and vaulted ceiling attached to a New Hampshire home

Trusted Craftsmanship with Custom Touches

Why Homeowners Choose Alliance for Enclosed Spaces

Alliance Deck Builders has helped hundreds of New Hampshire homeowners extend their living space with screen porches and sunrooms built for real-world use. Our work goes beyond the frame — we think through airflow, lighting, maintenance, and year-round usability. We stay current on local permit rules, snow load requirements, and foundation options so you don’t have to. With a blend of craftsmanship, practical design, and materials that perform across seasons, we deliver projects that stand the test of time.

Where Form Meets Function

A Relaxing Space That Works with Your Home

Whether it’s a backyard retreat, dining space, or hobby area, your enclosed porch should feel like part of your home. We offer a wide range of finishes — from tongue-and-groove ceilings to pre-stained cedar posts and composite flooring that matches your deck. For four-season sunrooms, we can coordinate HVAC access or install baseboard heaters for year-round comfort. Every design reflects your preferences, site layout, and the climate conditions unique to your property in New Hampshire.

Three-season porch with screen walls and wood ceiling overlooking backyard trees in NH

Why Our Clients Trust Alliance

Built for Local Climate: Designed to handle snow load, moisture, and seasonal swings.

Fully Custom Designs: Every porch and sunroom matches your layout and use goals.

Permits & Code Compliance: We handle approvals and meet all local building regulations.

Bug-Free Relaxation: Enjoy airflow and outdoor views without the mosquitos.

Year-Round Comfort Options: Choose three- or four-season builds with insulated upgrades.

Don't worry, we can help!

Screened & Sunroom Options That Fit Your Life

No two homes — or families — are alike. That’s why our porch and sunroom projects are built around how you actually use your space. Whether you're sipping coffee in a screened room with morning light or hosting winter dinners in a sunroom, we help you choose features that support daily life. From choosing the right screen type to designing roof angles that preserve views and privacy, we focus on form, function, and long-term livability.

Converts existing deck to enclosed porch or sunroom

Electrical-ready: outlets, lighting, fans, and more

Built to match your home’s architecture & trim

Engineered for Longevity

Weatherproof Framing & Easy Maintenance Finishes

Our screened-in porches and sunrooms are built with premium, low-maintenance materials that hold up in New Hampshire's wet springs, humid summers, and icy winters. We offer pressure-treated lumber, composite flooring, and aluminum-framed screens for long-term performance with minimal upkeep. All components are rated for outdoor exposure, with framing sealed, flashed, and anchored to prevent moisture intrusion and shifting. Our craftsmanship ensures fewer repairs and more enjoyment — season after season.

Frequently Asked Questions

Common Questions About Screened Porches & Sunrooms

At Alliance Deck Builders of New Hampshire, every project begins with your ideas — and ends with a space that brings them to life. Whether you want a quiet screened porch or a sprawling multi-level deck with built-ins, we bring experience, local knowledge, and expert craftsmanship to every job. Ready to turn your backyard into a place you love? Let’s talk.