3-Season Porch

An enclosed porch designed for use during the spring, summer, and fall. It uses floor-to-ceiling windows (often with vinyl) to block out wind and rain, though it isn't heated for the winter.

Three-season porch with hardwood flooring, black-framed windows, ceiling fan, and autumn foliage view

Spring Through Fall Use

Three-season porches use windows instead of just screens, giving you usable space from March through October in Minnesota. The windows block wind and retain some heat, making it comfortable when it’s 50°F outside and even longer when paired with infrared heaters or a fireplace.

You’re not heating it like a room, but you can use it when a screened porch would be too cold. That’s about 9 months of use instead of just summer.

Two-story gray house with elevated deck, white support posts, black-screened 3-season porch, and brick patio below

Window Systems

Popular options:

  • Xtend Porch Windows: Provide the most functionality for enclosing your porch
  • Porch Conversions: Premium systems, superior clarity
  • Combination: Mix of fixed and operable sections

What affects comfort:

  • South-facing gets solar warmth (good for spring/fall)
  • Insulated roof and floor extends usable season
  • Ceiling fans help in summer
  • Often equipped with infrared heaters or a fireplace to extend usability

Elevated home with screened 3-season porch and wooden deck railing surrounded by autumn trees

Investment

Timeline: 4-6 weeks typical

Cost: $50,000-$80,000 depending on size and window quality

  • 12×14 three-season: $50,000-$70,000
  • 16×20 with premium windows: $60,000-$80,000+

Three-season costs more than screened because of windows systems, insulation, and often a dedicated heat source.

Best for: Extended outdoor season, spring and fall use, wind protection, homeowners wanting 9+ months of use

Want three-season space? Call (763) 373-3873

Deciding if a New Porch is Right for You?

Download our free guide, "The Question Most Homeowners Don't Ask Before Building." This is a practical resource to help you think through how a new outdoor space will genuinely change how you live at home. Whether you're just starting to explore the idea or are ready to plan, this guide will help you gain clarity on your layout, expectations, and whether the investment makes sense for your lifestyle before you ever speak to a contractor.