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Sunroom Cost Calculator

Three-season or four-season sunroom build cost.

Enter your values

ⓘ Live results

Results
Estimated total
$37,100.00
Room size
192 sq ft
Structure & glazing
$28,800.00
Foundation
$4,800.00
Heating & cooling
$3,500.00
Cost per sq ft
$193.23

Quick answer

Sunrooms cost roughly $80–200 per square foot: three-season kits at the low end and insulated four-season rooms with HVAC at the top.

cost = area × rate + foundation + HVAC

How to use the Sunroom Cost Calculator

  1. 1Enter the planned room footprint.
  2. 2Choose the sunroom type — screened through to full conservatory.
  3. 3Pick the foundation and add HVAC for year-round use.

Worked example

Using the values the calculator loads with:

Inputs

  • Length16 ft
  • Width12 ft
  • Sunroom typeFour-season insulated
  • FoundationNew concrete slab
  • HVAC add-on3500 $

Results

  • Estimated total$37,100.00
  • Room size192 sq ft
  • Structure & glazing$28,800.00
  • Foundation$4,800.00
  • Heating & cooling$3,500.00
  • Cost per sq ft$193.23

Frequently asked questions

How much does a 12x16 sunroom cost?

About $25,000–35,000 for a four-season insulated room on a new slab, or $15,000 for a three-season build.

Does a sunroom add home value?

A four-season room typically returns 45–60% of its cost at resale and much more in usable living space.

About this calculator

Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.