Screened Porch Addition Cost Calculator

Square footage is the single biggest cost driver. A small 12x12 ft (144 sq ft) basic porch runs $8,000-$15,000 all-in. A 16x20 ft (320 sq ft) mid-range build hits $18,000-$35,000. A 20x24 ft (480 sq ft) luxury porch can exceed $60,000. Most screened porches fall between 150-400 sq ft. Per-square-foot costs decrease as size increases because fixed costs like permits, design, and mobilization are spread over more area.

Building on an existing concrete slab or wood deck saves $2,000-$5,000 versus pouring a new concrete slab ($4,000-$8,000 for a 300 sq ft slab). Full masonry foundations with footings below frost line are required in freeze-thaw climates and can add $8,000-$15,000. In mild southern climates, a floating concrete pad or pressure-treated wood deck frame is usually code-compliant and far less expensive.

A simple lean-to shed roof attached to the house costs the least and ties into the existing roofline. A full gabled or hip roof adds $5,000-$10,000 but looks better and sheds water more effectively. A flat or low-slope roof with membrane roofing runs $3,000-$6,000 but can cause drainage issues. Matching the existing house roofline with shingles, tile, or standing seam adds cost but dramatically improves curb appeal and resale value.

Standard aluminum-framed fiberglass screen panels are the baseline at $8-$15 per linear foot installed. Pet-resistant or solar screening upgrades cost $2-$5 per sq ft more. Motorized retractable screens from brands like Phantom or Lutron run $800-$2,000 per opening and $4,000-$12,000 for a full porch enclosure. Motorized screens allow full open-air use when retracted and are increasingly popular in high-end outdoor living spaces.

Basic finishing includes a ceiling fan, one exterior light fixture, and painted wood trim. Mid-range adds recessed lighting, multiple fans, painted tongue-and-groove ceiling, and composite decking. Premium finishes include outdoor-rated electrical outlets, dedicated ceiling fan remote controls, built-in bench seating, outdoor speakers rough-in, and herringbone or decorative tile flooring. Electrical work alone can add $1,500-$4,000 if a subpanel is needed.