How much should a deck repair cost in Fort Collins?

Most deck repairs in the Denver market cost $746 to $3,060, with an average of $1,891 (Angi, 2026). Swapping a handful of boards sits at the bottom; sistering joists, resetting posts on new footings or replacing a stair sits in the middle; a new ledger with flashing or a full railing replacement ($950 to $1,850 in Denver) pushes toward the top. Repairs that need a City permit add $110 plus sales tax.

How can I repair a rotted deck?

Find where the rot stops first. Push a screwdriver into boards, joists, the ledger and the bottoms of posts: sound wood resists, rotted wood sinks in. Rotted boards are replaced; a joist with rot at one end is cut back and sistered with a new treated joist bolted alongside; a post that is soft at the base is replaced and set on a proper footing with a metal post base. Rot in the ledger, where the deck meets the house, means that board and its flashing come off and are rebuilt.

Does deck repair need a permit in Fort Collins?

It depends on what is replaced. The Fort Collins Residential Deck Guide requires a permit to replace joists, posts, beams or stairs, to replace the guard railing, and to replace decking with heavier boards than before. Replacing worn boards with the same weight board, tightening fasteners or refinishing does not.

Is it worth repairing an old deck or should I replace it?

Repair when the frame is sound and the problem is local: a few boards, one stair, a loose railing post. Replace when the ledger, several joists or the footings are failing, because at that point the labor of working around old framing costs about as much as new. Angi puts a full replacement at $7,900 to $12,500 or more nationally, against $890 to $3,665 for a typical repair.

Why do decks in Fort Collins pull away from the house?

Usually the ledger and the footings. A ledger that was nailed instead of bolted, or never flashed, lets water rot the band joist behind it, and footings above the 30 inch frost line can heave in a cold winter. Either one lets the deck drift. Fort Collins now asks to see the ledger connection, flashing and a lateral connection on deck plans.

Can a deck be repaired in winter?

Most repairs can. Board, railing and stair work goes ahead on dry days, and new footings can be dug whenever the ground isn't frozen. Stain and sealer wait for a dry stretch that fits the temperature range printed on the product label.

Deck Repair in Fort Collins CO | Pineridge Deck Pros

Deck repair in Fort Collins CO, from boards to footings

Many Fort Collins decks that need work are pressure-treated pine from a few decades back, and they fail in a predictable order. The boards go first: they cup, split and gray in the sun at 5,000 feet, and screws work loose as the wood shrinks in dry winter air. Then the tops of the joists rot where water sits under the boards. Last, and most serious, the ledger rots behind missing flashing or the posts settle on footings that were never deep enough.

Repair matches the problem. Boards are replaced in the same size and, where possible, the same species so the deck doesn't look patched. Framing repairs follow the 2024 International Residential Code that Fort Collins adopted on April 1, 2026, which is also why some repairs now need a permit that the original deck may never have had.

Signs a deck needs repair

Boards that flex or feel spongy underfoot, or screws standing proud of the surface.
A railing post that moves more than a little when you lean on it.
Stairs that bounce, lean, or have treads splitting at the screws.
A gap opening between the deck and the house, or stains on the siding under the ledger.
Posts that have sunk, leaving the deck out of level, or wood that is soft at the base of a post.
Joist hangers or post bases rusted through, common on treated lumber with the wrong fasteners.

Hands holding a wood board and a small hand tool beside a miter saw — Working a replacement board at the saw.

What repairs need a Fort Collins permit

Replacing structure needs a permit; replacing surface does not. The City's Residential Deck Guide (revised June 24, 2026) lists the repair items: joists, posts, beams or stairs; the guard railing; and decking boards when the new boards are heavier than the old ones. That last item catches people switching from pine to composite or hardwood. The permit is $110 plus sales tax, and inspections follow the same order as a new deck: footings in the open hole, post connections, rough framing before boards go on, then a final.

The full list of triggers, what the plans have to show and when an engineer is needed are in the Fort Collins deck permit guide. Railing height and baluster spacing are in the railing and stair code guide. City text: Fort Collins building permits.

Repair prices in the Denver market

Deck repair costs, Denver market (2026)

Repair	Typical cost	What drives it
Deck repair overall	$746 to $3,060	Average $1,891; size, material and how much framing is involved
Repair labor	From $15 per sq ft	Or $50 to $100 an hour
Repair materials	$3 to $45 per sq ft	Pressure-treated at the low end, composite and hardwood high
Cedar boards	$3 to $7 per sq ft	Material for board replacement
Railing replacement	$950 to $1,850	Length, material and post re-anchoring
Fort Collins permit, structural repair	$110 plus tax	Joists, posts, beams, stairs or guards

Sources: Angi, How Much Does Deck Repair Cost in Denver, CO? (2026); City of Fort Collins building permit fees. Quotes vary by site.

If the repair list is long, compare it with a rebuild: the deck replacement in Fort Collins page has the numbers.

Person driving screws into new deck boards around a tree trunk — Fastening new boards on a deck, cut around a tree.

How a deck repair goes

1
Probe and map the damage
Every board, joist end, post base and the ledger gets checked with a screwdriver and a level. The map decides whether this is a repair or a rebuild.
2
Check whether it's permitted work
Joists, posts, beams, stairs and guards are permit items in Fort Collins. Those repairs go through the City before any framing is touched.
3
Shore and open up
The deck is supported with temporary posts where needed, then the bad boards come up so the framing can be seen and inspected.
4
Rebuild the structure
Joists are sistered or replaced, posts reset on footings 30 inches deep with post bases, and the ledger rebuilt with bolts and flashing. Fasteners rated for treated lumber go in throughout.
5
Close up and finish
New boards are matched as closely as the material allows, railings are re-anchored to the framing, and wood is sealed once it has dried.

Board, joist, post and ledger repairs explained

Boards

Split or soft boards are pulled and replaced. On an older wood deck the new board won't match the gray of the old ones until it weathers or the whole deck is cleaned and sealed. Moving the whole surface to composite decking is possible when the joists are sound and spaced for it, and it counts as heavier decking under the City rule.

Joists and beams

A joist with rot at one end is cut back to sound wood and sistered: a new treated joist bolted full length beside it. Joists rotted along the top get joist tape on the new work so water doesn't sit in the grain again. A sagging beam usually means a post or footing problem underneath.

Posts and footings

Sunken posts are the classic Front Range repair. The deck is shored, the old footing dug out, and a new pier poured at least 30 inches below grade for an attached deck, sized to the area that post carries; the footing depth guide has the diameters.

Ledger

The ledger is the board bolted to the house. If it was nailed on, or the flashing above it failed, it comes off, the house rim is checked for rot, and a new ledger goes on with code fasteners and flashing. It is the single most important repair on an attached deck.

Worked example

Resetting the posts and railing on a 1990s deck near Harmony Road

In this example the deck is about 14 by 16, built of treated pine about 25 years ago and attached to the house. Two posts at the outer beam have settled an inch, the railing wobbles, and the boards are worn but sound. The framing is checked and the joists are fine, so this is a repair, not a rebuild. Resetting posts and replacing the whole railing puts it near the top of Angi's typical Denver repair range in the table above, or past it.

New posts and a guard railing are both permit items in Fort Collins, so the repair is drawn and permitted first. The footings are inspected open before concrete goes in, and the railing is bolted back to the framing to meet the deck railing rules.

Shore the deck, repour 3 footings to 30 in, new posts and bases, re-level the beam: 16 to 24 labor hours at $50 to $100 an hour	$800 to $2,400
Replace 40 ft of railing (Denver railing replacement range)	$950 to $1,850
City permit for posts and guard	$110 plus tax
Example total before concrete and post materials	$1,860 to $4,360

A worked example for a typical south Fort Collins deck, not a past job or a quote. Rates: Angi Denver deck repair (2026) for hourly labor and railing replacement; City of Fort Collins fees. The labor hours are this example's estimate.

Repair now, plan the rest

Many repairs are a good moment to decide what's next: sealing a cedar deck, a new railing, or a cover. The deck builder in Fort Collins page lists every service.

Deck Repair in Fort Collins CO