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Question DetailsAsked on 4/27/2017

How much to change a deck to a screened porch

16 by 16 deck and change to sunroom

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1 Answer


VERY rough numbers - vary by area, materials used, how well your existing deck is built, soil conditions and frost depth (for any needed supporting foundations), etc. I am also assuming this a relatively near ground level - not highly elevated.

From an existing bare deck, probably in the very roughly $5-10/SF (of perimeter wall - so 3-sides of deck times height to roof, about 48x8 = 380 SF feet say in your case) if already roofed over with corner posts usable to connect the "wall" to. Sometimes as low as $3/SF range with kits. So roughly $2000-4000 likely for that.

Add in prefab plastic or metal gazebo type canopy roof (permanent, not fabric) if you don't have a roof, probably about $7-20/SF depending on materials (about $12-20 for metal except more like $30's/SF of footprint coverage area for high wind or heavy snowload rated).

For permanent house-type roof instead of the gazebo type roof cost add (to the screenwall cost) instead about $30-50/SF of footprint commonly - sometimes as low as $20-30/SF for simple no-frills shed type roof - wood framed, asphalt shingled, down to $10-20/SF range sometimes for small plywood roof with shed-type rollout asphalt roll roofing - on up to as high as $50-90/SF with peaked house-type roof, full flooring and finished ceiling, lights and fan, etc. So - from around $8000 to as high as $20-some thousand for a real roof.

Upgrade from screening to full glass enclosure (Florida / Sunroom) change the screening cost above to about $40-50/SF (of wall, not footprint) on up to over $100/SF depending on how many of the windows operate and whether conventionally framed or something like a Nanawall, which can get well over $100/SF. So for your 16x16 deck - assuming 8' high wall, maybe $15,000-40,000 additional to go with glass enclosure - though normally a regular deck would not have proper foundations or stability for a glass curtainwall, so add another $20-40/SF (of footprint) or about $5,000-10,000 in your case for properly framed flooring - basically making the porch an addition to the house with house-type foundations.

Here is a link to a somewhat similar question about converting to a Florida/Sunroom from a patio -

Answered 3 years ago by LCD

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