"Cost recouped" is the standard way decks get justified, and it is a genuinely useful figure as long as you know what it measures.
It measures the increase in a home's sale price attributable to the project, divided by what the project cost at professional prices, in the year it was built. It is not a return on investment, it does not compound, and it assumes the deck is close to new when the house sells.
The published range
| Project | Typical cost recouped |
|---|---|
| Wood deck addition | 50–68% |
| Composite deck addition | 40–55% |
| Deck resurfacing / repair | 60–75% |
| Deck with roof or outdoor kitchen | 30–45% |
Wood outperforms composite on this metric consistently, which surprises people. The reason is arithmetic rather than taste: composite costs 60–90% more to build and appraises at close to the same figure, because an appraiser comparing your house to three neighbors' records "deck, 200 ft²" rather than the board material.
Composite's advantage shows up in the twenty years you own it, not on the closing statement — that is the maintenance arithmetic, and it is a strong argument, just not a resale one.
Why most homeowners get less than the headline
The figures assume contractor pricing. They compare a professionally built deck's cost to the value added. Build it yourself and the recoup percentage against your material cost is far above 100% — which is the real reason DIY decks pay.
Age destroys it fast. The published figures apply to a deck roughly a year old. A deck that is eight years old, greyed, and needs a stain contributes close to nothing to appraised value, and one with a soft joist or an unbolted ledger contributes negatively — the inspection report turns it into a repair credit.
Market expectation is binary. In a suburban market where every comparable house has a deck, not having one is a deduction and having one is neutral. In a market where decks are unusual, adding one rarely returns anything. The value is in matching the neighbourhood, not in exceeding it.
Over-improvement caps out. A $28,000 deck on a $310,000 house does not appraise. Roughly, outdoor living space stops contributing above about 5–8% of home value.
Where a deck actually does add value
When it fixes a defect. A back door opening onto a 4 ft drop with no landing is a real problem, and solving it adds more than the deck costs.
When it makes unusable ground usable. Steep or wet backyards are dead space. A deck over one converts square footage a buyer can picture using, and that is the mechanism behind most of the recoup number.
When the alternative is a failing deck. Removing a rotten deck costs $1,500–3,000 and leaves a scar on the siding. Replacing it captures most of that as sunk cost either way.
Simple, permitted, well-proportioned. Two decks of the same size can appraise very differently, and the differences are boring ones: is it permitted, is it obviously sound, does it fit the house, is the railing current-code.
The permit line is not optional here
This is where an unpermitted deck bites. Buyers' inspectors look for permit records, and a deck without one becomes a negotiating item worth several times what the permit would have cost.
An unpermitted deck can go from an asset to a $4,000 deduction in a single inspection report, and there is no way to fix that quickly during a 30-day contingency period.
The honest way to decide
Ask whether you would build it if the resale figure were zero.
Most decks are bought for the eight or twelve years of use, and the 50–68% is a partial refund on that enjoyment rather than an investment case. Judged as use, a $12,000 deck used most weekends for a decade is inexpensive. Judged as an investment, it loses money — and so does almost every home improvement that is not a kitchen or a roof.
If the answer is yes, build it properly: correct footing depth, a bolted and flashed ledger, and a frame sized off the tables. Those cost very little extra at build time and they are exactly what the inspection report at resale is looking for.