Published August 17, 2026
Two contractors can quote the same 16x20 deck at $18,000 and $45,000 and both be honest. The difference is material, structure, and detail — not markup.
Where the money actually goes
| Component | Budget build | Premium build |
|---|---|---|
| Footings | 6 piers to 42" frost depth | 10+ piers, engineered brackets |
| Frame | Treated SYP, 16" o.c. | Treated, 12" o.c., joist tape everywhere |
| Decking | Treated pine, $3–5/sq ft | Capped composite, $9–15/sq ft |
| Railing | Treated wood, $30/lf | Aluminum or cable, $90–160/lf |
| Stairs | Straight run, 4 steps | Wide cascading stairs with lighting |
| Extras | none | Under-deck drainage, lighting, screened section |
The five upgrades worth paying for in Minnesota
- Joist tape ($400–$900). Water sitting in screw holes kills a Minnesota frame. Tape adds a decade.
- Footings to true frost depth (42–60" by county). Shallow footings heave and tear off ledgers.
- Capped composite decking. Handles freeze-thaw, UV, salt, and shovels.
- Proper ledger flashing. The number one cause of deck failure nationally.
- Coated or stainless structural fasteners. Modern treated lumber eats cheap hardware.
The three that rarely pay back
- Exotic hardwood that needs annual oiling in this climate.
- Extra square footage with no use case.
- Built-in benches instead of movable furniture.
2026 Twin Cities price bands
| Build | Cost |
|---|---|
| Treated pine, ground level, 250 sq ft | $9,000–$16,000 |
| Cedar, elevated, 320 sq ft | $18,000–$30,000 |
| Composite, elevated with stairs, 400 sq ft | $32,000–$55,000 |
| Composite plus screened section | $55,000–$95,000 |
How to compare deck bids fairly
Force every bid to state footing count and depth, joist spacing, decking brand and line, railing system, fastener type, and whether permit and inspection are included. A bid that omits joist spacing and footing depth is not a real bid.
Ask us to quote yours with those line items spelled out so you can hold every other bid to the same standard.
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Estimated project range
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Twin Cities 2026 pricing. A ballpark only — access, soil, permits, and condition move the real number. Send it over and we'll price your actual project for free.
Frequently asked questions
How deep do deck footings need to be in Minnesota?
Footings must extend below the local frost depth, commonly 42 to 60 inches depending on jurisdiction. Shallow footings heave and can tear a deck away from the house.
Is composite decking worth it in Minnesota?
Usually yes. Capped composite resists freeze-thaw, UV fade, and shovel abrasion better than wood and eliminates annual staining.
Do I need a permit for a deck in the Twin Cities?
Almost always. Most Minnesota cities require a permit and inspections for attached decks or decks above a certain height, and your contractor should pull it under their license.