Remodeling
Porch Addition Cost Calculator
Prices a porch, where enclosing one changes it from a structure into a room.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus materials and the call-out. An open porch is a foundation, a deck or slab, posts, a roof and a railing, which is a bounded job with weather-exposed finishes. Screening it in adds framing, screen panels and a door for a modest increase. Enclosing it with glazing and conditioning is a different proposition entirely: it becomes habitable area, which brings insulation, a proper floor assembly, heating and cooling, and the code requirements that come with conditioned space.
What moves the number
- Open, screened or enclosed, which is the largest cost decision by a wide margin.
- Roof structure and how it ties into the house.
- Whether the floor is a slab or a framed deck over a crawl space.
- Setbacks, since a porch extends the building footprint toward the boundary.
Where this one goes wrong
Enclosing a porch is where projects get expensive unexpectedly. Once the space is glazed and heated it is conditioned floor area, and it has to be insulated, have a compliant floor assembly over the ground, meet energy code, and in many places it counts toward lot coverage and the permitted footprint in a way an open porch may not. A client asking to add glass to an existing screened porch is usually not expecting that chain. The roof tie-in matters for the same reason it does on an addition: the junction between new porch roof and existing wall is where water will try to get in.
Before you quote
- Establish whether the porch will be open, screened or conditioned before pricing.
- Check setback and lot coverage treatment for the chosen type.
- Flash the roof-to-wall junction properly rather than relying on sealant.
Where the rules come from
Questions
About this calculator
Is enclosing a porch expensive?
Considerably more than screening it, because glazing and heating turn it into conditioned space. That brings insulation, a proper floor assembly, energy code compliance and often a different treatment under zoning. Adding glass to a screened porch is not the small step it appears to be.
Does a porch need a permit?
Usually, since it involves a foundation, structure and a roof tied to the house. It also typically counts toward how close the building may be to the boundary and how much of the lot is covered. Both are worth confirming before design rather than after.
Screened or open porch?
Screening costs modestly more than open and makes the space usable in insect season, which for most clients is the better value. The step to a fully enclosed, conditioned room is the expensive one. Many people get most of what they wanted from screening alone.
The formula
total = hours x people x rate + parts + call-out, then sales tax
Put this calculator on your site
Free to embed. Paste this where you want it to appear. It stays up to date automatically because it loads from BDEVY.
Please keep the attribution line. It is the only thing we ask in return.
How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 160 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $88.
- Parts and materials ($). Enter your own figure; the page starts at $11,000.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 160 h |
| People needed | 1 |
| Labour rate charged | $88 |
| Parts and materials | $11,000 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $25,175 |
| Labour | $14,080 |
| Before tax | $25,175 |
| Sales tax | $0 |
About $25,175: $14,080 of labour, $11,000 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $44 | $18,135 |
| $66 | $21,655 |
| $88 example above | $25,175 |
| $132 | $32,215 |
| $176 | $39,255 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 160 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $88.
- Parts and materials ($)
- A money amount, starting at $11,000.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.