Deck Repair in Los Angeles

Deck repair is the work of bringing a residential deck — wood planks over a framed substructure, sometimes capped with composite, sometimes finished with a railing system, sometimes cantilevered out over a hillside drop — back to a state where it is safe to walk on, presentable to look at, and structurally sound enough to host the people you put on it. The scope ranges across a wide band. On the small end, you have a single splintered board replaced in place, a wobbly railing tightened back to spec, or a few popped fasteners reset. In the middle, you have multi-board section replacement where five or eight planks have aged out together, sections of railing rebuilt with new balusters, or stair treads pulled and reset. On the structural end, you have ledger board work where the deck attaches to the house, joist sistering or replacement, post-base hardware retrofit for earthquake resilience, and full guardrail rebuilds to bring an old deck up to current code. Most LA homeowners book deck repair before a summer party, after a winter rain season exposes rot, when a child's foot punches through a soft board, or when an inspector flags the structure during a property sale.

Los Angeles geography splits decks into three very different repair populations, and the right approach depends on which one you have. The Hollywood Hills, Mount Olympus, Beachwood Canyon, Sunset Strip, and the canyon communities of Laurel, Coldwater, and Benedict are full of cantilevered hilltop decks that hang out over slopes — the joists extend past the support posts and the deck floats over a thirty-foot drop. These decks are spectacular but mechanically demanding: every connection carries amplified load, lateral wind hits the underside, and the post bases sit on concrete piers that have to be inspected for cracking and tilt after each significant rain or seismic event. Pasadena, South Pasadena, Highland Park, and parts of Eagle Rock have a second population — original craftsman porches and decks built between 1905 and 1940, often in old-growth redwood that is still structurally sound after a century but has surface checking, weathered railings, and ledger flashing that was never installed because the original construction predated modern detailing. The Westside — Santa Monica, Venice, Pacific Palisades, Mar Vista flats, parts of Brentwood — is the third population: ocean-adjacent decks where salt air corrodes any fastener that isn't stainless steel, where galvanized screws turn into rust streaks within five years, and where the wood itself takes more abuse from sun and salt spray than anywhere else in the basin.

A complete deck repair starts with diagnosis, not with replacement. The visible symptom — a soft board, a sagging railing, a rusted screw head — is rarely the whole problem. A pro who knows decks will probe the suspect board with an awl, follow the rot back to its source, and check whether the joist underneath is also affected. They will pull a railing post sideways and see whether it flexes at the connection or at the post itself. They will inspect the ledger board for flashing — the metal sheet that should be tucked under the house siding to keep water out of the rim joist — and tell you whether the original install skipped it (which is the single most common cause of catastrophic deck failure in older LA homes). A surface-only fix on a structurally compromised deck is dangerous and expensive twice: you pay for the cosmetic repair, then you pay again when the underlying problem surfaces six months later. The right repair sequence is structure first, surface second, finish last.

Boards are soft, splintered, or showing visible rot — especially along the edges, near planters, or under hose bibs. This is the most common deck call in LA, and it usually clusters in predictable places. Boards near downspouts that drain onto the deck, boards under planters that have been sitting in the same spot for years, boards at the perimeter where rain runs off the railing — these go first. You can press on the board with a thumb and feel the fibers give. Single board replacement runs $80-160 per board depending on species and access. Most jobs in this category have three to six boards rotted across one section, putting the total at $280-580 for a focused refresh. Catch it early before the joist below is also affected and you save the bigger repair down the line.

A railing wobbles, leans outward, or has a baluster you can pull free with one hand. Railings are the part of a deck most people touch every day, and they age faster than the deck floor because the post bases trap moisture against the deck surface. A railing tighten — pulling each post, resetting the lag bolts or carriage bolts into solid wood, replacing any cracked balusters — runs $180-380 in LA labor for a typical 20-30 foot run. If the posts themselves are rotted at the base, you need a replacement: $480-980 for a section depending on length, baluster style, and whether the railing has to match an existing run elsewhere on the deck. This is also the most safety-critical repair on the list. A railing that gives way under someone's weight — at any height, but especially on the cantilevered hilltop decks across the Hills — is a hospital-or-worse outcome.

The deck attaches to the house at a ledger board and you cannot find flashing where it meets the siding. This is the silent killer of LA decks, and it deserves its own bullet because it can hide for years and then take out the whole deck plus a section of the house wall. The ledger board is the horizontal beam bolted through the house's rim joist; it carries half the deck's weight. Without flashing, water runs down the siding, hits the top of the ledger, soaks into the rim joist, and rots out the structural connection between deck and house. The deck looks fine right up until it pulls away. Earthquake retrofit is part of this story too — modern code requires lag bolts or proper hardware connectors at the ledger, and many older LA decks were attached with nails alone. Ledger inspection and flashing/hardware retrofit runs $580-1,500+ depending on access and how much rim joist needs replacement.

You're prepping the house for sale, an inspection, or a refinance appraisal and the deck is the open question. Inspectors flag decks more aggressively than they flag almost any other exterior element, because deck failures cause injuries and lawsuits. A leaning railing, a cracked stair stringer, a ledger with no visible flashing, post bases that lack hardware connectors — any of these will show up in the report and become a negotiation item. A focused $500-1,500 deck repair visit before the inspection usually pays for itself in the offer price and avoids the back-and-forth of a buyer requesting the seller fix it.

Wildfire risk in your zone is high — Topanga, Brentwood Hills, Mandeville Canyon, parts of Bel Air, the upper canyons of Pacific Palisades, the foothill edge of Pasadena and Altadena — and the deck is built in something flammable. After the 2025 fire season, Cal Fire and homeowner insurers have tightened their stance on wood decks attached to structures in fire-prone areas. Some carriers now require Class A fire-rated decking material in WUI zones to maintain coverage. Replacing a wood deck surface with a composite product like TimberTech AZEK or Trex Transcend, both of which carry Class A flame-spread ratings, is increasingly a coverage requirement, not just a preference. Plan for $8-15 per square foot in material plus install on a full surface conversion.

Verify what's been verified. Every Shatun Brothers deck repair pro verifies their identity through Persona ID + selfie liveness before they list: government-issued ID through Persona, current general liability insurance certificate, and California state license where the job exceeds the $500 CSLB handyman scope. Single board replacements, railing tightens, and small cosmetic fixes typically fall under the exemption. Anything structural — joist work, ledger replacement, post-base retrofit, full guardrail rebuilds, multi-section reframes — exceeds the exemption and requires a licensed B General Building or C-5 Carpentry contractor. We route structural jobs only to pros who hold the appropriate license, and we surface that distinction on every pro's profile so you see at a glance whether they are eligible for the work you need.

Match the pro's material experience to what you have. Cedar and redwood are the historical LA favorites — both have natural rot resistance, both weather to a soft silver when left unsealed, and both are still common in older Pasadena and Hancock Park installations. Pressure-treated pine is the budget framing material and shows up under the deck more than on top of it. TimberTech, Trex, Fiberon, and the other major composite brands now dominate new construction and replacement projects because they hold up against LA sun without annual sealing. Ipe — the dense Brazilian hardwood — is the premium choice for high-end Westside and hillside projects, and it requires its own fastener system because standard screws split it. Cali Bamboo and similar engineered bamboo decking is a growing niche. A pro who works mostly in pressure-treated pine may not be the right fit for matching a 1920s redwood porch in South Pasadena, and a composite specialist may not have the carpentry chops for hand-cutting ipe planks. Ask which materials they handle regularly and whether they can source matching boards.

Ask about ocean-zone fastener selection if you live within two miles of the coast. The standard galvanized deck screw works fine in the Valley, in mid-LA, and inland — it lasts twenty years, the coating holds, and rust is cosmetic at most. Within sight of the ocean, the same screw turns into a rust streak in three to five years, the coating fails, and the screw heads either snap off or seize. The right fastener for Santa Monica, Venice, Pacific Palisades, Malibu, and Manhattan Beach decks is 305 or 316 stainless steel, full stop. The cost difference is real — stainless screws run roughly three times the price of galvanized — but the labor cost of pulling rusted screws and re-securing boards in five years is far higher than the upcharge today. A pro who proposes galvanized fasteners on a coastal job either does not work in the area regularly or is cutting corners on your dollar.

Confirm earthquake-aware ledger and post-base detailing for any structural work. Modern California code requires positive hardware connections at the deck-to-house connection (lag bolts at minimum, often through-bolts with backing plates) and at every post-to-pier connection (Simpson Strong-Tie or equivalent post bases with hold-downs). Older LA decks frequently lack both. Cantilevered hilltop decks in the Hills depend on these connections to handle lateral seismic load — the deck wants to twist and pull during a shake, and the hardware is what keeps it attached to the house and the piers. If the pro starts talking about replacing rotted boards but goes silent when you ask about the post bases and the ledger flashing, that is a flag. The right pro will inspect the structure first and tell you whether you need a structural pass before the cosmetic pass.

Read the recent reviews, not the lifetime average. A pro with 60 reviews averaging 4.9 stars but recent reviews mentioning boards that softened again within a year, railings that re-loosened, or stain that peeled inside two seasons is heading the wrong way. We show the last 10 reviews on every pro profile so you see the trajectory, not just the historical score. Decks reveal repair quality on a delay — bad work holds for one summer and fails in the second winter rain — so the most useful reviews are the ones written six months to two years after the work.

Get scope, haul-away, stain match, and warranty in writing. Pulling rotted boards, dismantled railing sections, and damaged stair treads generates real debris — a single mid-size deck repair can produce a quarter-pickup load. Some pros include haul-away in the quote; others charge $80-200 extra. Stain or sealer match is typically a separate line item if you want the new boards to read as the rest of the deck rather than as obvious patches; this is its own visit a few weeks after the install once the new wood has dried. Warranty on labor should be one year minimum, two years for structural work; warranty on material follows the manufacturer. Confirm all four points before the work starts so the final scope, the final invoice, and the final look match what you expected at booking.

Single rotted board replacement is a capable DIY job for a handy homeowner. The work is mechanical: locate the joists under the rotted board, pull the existing fasteners (or cut them if seized), lift the old board out, cut a replacement to length, and screw it down with stainless or properly-rated coated screws. Plan three to four hours for a first-timer doing two or three boards, buy slightly more material than you measure for to allow for cuts and mistakes, and use a circular saw with a sharp finish blade for clean ends. The risk on this job is low — the worst case is a board that does not sit flush and needs to be pulled and reset. Railing tightening is the same category: pulling each post, resetting lag bolts into solid wood, replacing cracked balusters with matching stock from a lumber yard. A confident DIYer with a drill, a level, and an afternoon can handle it, and the labor savings are real.

Joist work, ledger work, and any structural repair is a hire-a-pro job, full stop. The failure modes are too expensive and too dangerous. A botched ledger replacement can mean the deck pulls away from the house under load — a moment that sometimes coincides with a party on the deck. A joist sistered to a rotted parent joist with the wrong fasteners or no hardware connectors holds for a season and then fails. Post-base hardware retrofit on a hilltop cantilevered deck, where lateral seismic load is the dominant case, is engineering-grade work that needs the right products (Simpson Strong-Tie hold-downs, anchor bolts, proper inspection holes) and the right install sequence. The price difference between a $1,000 pro structural fix and a failed DIY that requires a full deck rebuild plus injury liability is usually 20-50x. This is the part of the deck where you write the check.

Staining and sealing is DIY but tedious, and most homeowners regret starting it halfway through. A 200 square foot deck takes a full weekend if you strip first, longer if the old finish is stubborn. The work is on your knees, in the sun, with stain that gets on your hands and clothes and the siding behind the deck. Pro labor for a stain refresh runs $480-1,200 and the work gets done in a day with proper masking, even coverage, and the right product for LA's UV and dry-heat exposure. If you enjoy the kind of work and have the weekend, DIY is reasonable; if you are on a deadline or want it to look like a contractor finish, pay for the visit. The combination move many LA homeowners make is to DIY the surface board fixes and railing tightening, then pay a pro for the stain pass at the end so the new boards blend with the old.

Skipping flashing at the ledger board. This is the single most expensive mistake on the list because it does not show as a problem for years and then takes out the deck plus the rim joist plus the siding plus the wall framing behind it all at once. The flashing is a metal sheet, usually aluminum or copper, that tucks under the house siding above the ledger board and laps over the top of the ledger to direct water away from the deck-house connection. Without it, every rain runs down the siding, hits the top of the ledger, soaks into the rim joist, and rots out the structural connection. By the time you see a problem from the deck side, the wall behind is also compromised. Older LA homes — pre-1990 — frequently have ledgers installed without flashing because the detailing was not standard practice. Any deck repair on an older home should include a ledger inspection, and any new ledger work should always include flashing.

Using galvanized screws or fasteners on a coastal deck. Within sight of the Pacific — Santa Monica, Venice, Pacific Palisades, Malibu, Manhattan Beach, Hermosa, Redondo — salt air destroys galvanized coatings inside three to five years. The screw heads rust into stains that bleed down the wood, the screws themselves seize and snap, and pulling them for the next repair becomes its own labor item. Stainless steel — 305 series for normal use, 316 series for direct ocean-spray exposure — is the only correct choice in coastal zones. The same logic applies to joist hangers and post-base hardware: galvanized G-185 is the inland standard, stainless is the coastal standard. The cost upcharge for stainless is real but small compared to the cost of redoing the work in five years.

Reusing cracked or splintered railing balusters. The balusters carry less structural load than the rails or the posts, but they are the part most likely to be grabbed by a child catching their balance or by an adult leaning into them at a party. A cracked baluster looks fine until weight hits it, then it splinters under the hand or fails completely. Any repair that involves dismantling a railing should include replacing every baluster that shows a crack, a soft spot, or visible end-grain checking, even if it adds twenty minutes and forty dollars to the job. The cost is trivial compared to the liability of a railing failure.

Skipping the expansion gap when installing composite decking in LA's summer heat. Composite boards — TimberTech, Trex, Fiberon — expand and contract with temperature far more than wood. The manufacturer specs require an end-gap of typically 1/8 inch to 1/4 inch between board ends, and a side-gap depending on the system. In LA's summer heat, especially on south-facing decks that hit 140+ degrees Fahrenheit on the surface, composite boards installed tight against each other or tight to the house will warp, bow, and pop fasteners. The fix is expensive — pulling boards, replacing damaged ones, and resetting with proper gaps. Read the manufacturer install spec before the boards go down, and be especially conservative with gaps on hot exposures.

Painting over rotted wood instead of replacing it. This is the cosmetic-shortcut version of the deck story, and it shows up most often on rental properties and on homes prepping for sale where the seller wants the deck to look fresh without the cost of a real repair. Paint or solid stain over rotted wood seals moisture in and accelerates the rot underneath while hiding the symptom from the surface. A board that was soft enough to push with a thumb is still soft a month later — now it is soft and painted. The right move is always to remove and replace the rotted material first, then refinish. Inspectors and buyers can usually tell the difference within a few minutes of probing, so the shortcut rarely pays off.