What should you know before building a deck or patio?
Deck vs. patio isn't a style choice first — it's a site choice. Decks solve elevation (sloped yards, raised entries, walk-out levels); patios solve flat ground at grade for less money per square foot. Wood decks return roughly 65–95% at resale (2025–2026 Cost vs. Value data, varying by market and material); patios typically cost less to build but are valued more variably. The yard usually makes the decision before you do.
Deck or patio: the site test
| Your situation | What it favors |
|---|---|
| Door sits above grade / sloped yard | Deck — it bridges the elevation |
| Flat, well-drained ground at grade | Patio — lower cost, minimal structure |
| Poor soil or drainage issues | Deck — less ground contact (drainage still needs solving) |
| Full sun, hot climate | Either — but plan shade structure into the budget |
| Resale within a few years | Deck slightly favors resale data; a good patio still shows well |
What homeowners say they wish they'd known
| The regret | The lesson |
|---|---|
| "Our deck needed a permit and an inspection" | Attached and elevated decks are structural work almost everywhere |
| "Composite doubled the material cost" | Composite trades upfront cost for maintenance — decide on total-cost math |
| "The patio pooled water against the house" | Grading and drainage are the patio project — pavers are the finish |
| "It doesn't connect to the kitchen" | Outdoor space earns use through access — the door location matters more than the size |
| "Railings and stairs blew the budget" | Elevation drives deck cost non-linearly; higher = disproportionately pricier |
The feasibility questions that come first
Where's the door, what's the grade, what's the sun path, and what does the ledger board attach to? An outdoor build succeeds or disappoints on siting — the same feasibility-before-design order as every other project. A Formaus.ai analysis reads your yard and access from photos, grounded in 15 years of architectural experience, so you invest in the version your site supports (how it works).