Cost to Screen Porch / Three-Season Room Addition in Los Angeles, CA (2026)
If you’re budgeting a screen porch / three-season room addition in Los Angeles, most projects run $9,476-$41,456, 18% above the $18,000 national average. What moves that number most is usually one thing: Square Footage. On its own it can swing the cost by $5,000 - $40,000, so that’s the decision to slow down on before you sweat the smaller stuff.
Easiest place to save: Build over an existing deck or concrete patio. You eliminate new foundation costs of $2,000-$5,000 and the existing floor is already there.
$9,476-$41,456 in Los Angeles
18% above the national average · 1.18x cost multiplier
In Los Angeles, a screen porch / three-season room addition runs $9,476 to $41,456 on average - about 18% above what homeowners pay nationwide. The West Coast market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.
Cost Breakdown in Los Angeles
| Line Item | Low | Mid | High |
|---|---|---|---|
| Cost per sq ft | $47 | $107 | $178 |
| Materials | $5,288 | $11,163 | $25,850 |
| Labor | $4,552 | $9,582 | $21,560 |
| Permits | $588 | $940 | $1,763 |
| Total | $10,428+19% vs. national avg | $22,508+18% vs. national avg | $52,111+18% vs. national avg |
Budget
Basic 12x16 (192 sq ft) screen porch added to existing deck - wood framing, aluminum screening, simple shed roof, no electrical
Mid-Range
16x20 (320 sq ft) three-season room with composite decking, ceiling fans, recessed lighting, screen or EZE-Breeze panels, proper footing
Premium
20x24 (480 sq ft) fully enclosed three-season room with vaulted ceiling, bead board ceiling, ceiling fans, built-in outdoor kitchen bar, premium windows or screen systems, full electrical
Material Options
Material prices below are national averages; availability in Los Angeles may shift costs slightly.
| Material | Cost/Unit | Best For |
|---|---|---|
| Standard Aluminum Insect Screening | $1 - $3 per sq ft of screen area | Warm climates or homeowners who primarily want insect protection during summer monthsLowest cost, good visibility, allows full airflow, easy to repair |
| EZE-Breeze Vinyl Track Panels | $8 - $15 per linear foot | Homeowners in mixed climates who want to use the porch spring through fallConvertible between screen and enclosed panel, extends season significantly, keeps out rain and wind |
| Fiberglass Screening | $1.50 - $4 per sq ft | High-traffic porches or pet households where durability is a priorityMore durable than aluminum, better UV resistance, doesn't crease as easily |
| Composite Decking Floor | $8 - $15 per sq ft installed | Three-season rooms and porches that will see heavy use and need low-maintenance flooringLow maintenance, durable, no painting or staining needed, fade-resistant |
| Pressure-Treated Wood Frame and Floor | $4 - $8 per sq ft for flooring | Budget-conscious builds where maintenance is acceptableLower cost, natural look, easy to repair, widely available |
Other Projects in Los Angeles
Los Angeles Estimate
Typical Range
$9,476-$41,456
vs. National Average
18% above national
Cost Multiplier
1.18x
Cost Per sq ft
$47-$178
This 1.18x estimate prices Los Angeles labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.
See national average costs →