Commercial Deck Repair · CSLB #1060736
Deck Repair for California Commercial & Multifamily Properties
We repair decks for apartment communities, condominiums, HOAs, and hotels across California — dry rot in the framing, failed joists and beams, loose or splintered boards, sagging stairs, unstable railings, and decks leaking into the space below. As CSLB-licensed deck repair contractors, we fix the cause rather than the symptom: the structure is repaired and re-waterproofed as one assembly, so the damage doesn’t return through your next inspection.
- CSLB #1060736 Licensed California contractor
- 9+ yrs Repairing commercial decks & balconies
- SB 721 / 326 Findings repaired & closed on the record
- Commercial Multifamily, HOA & hotel only
01 Why it matters
Deck damage starts in the frame, not on the surface
The boards are the last part of a deck to fail. Water gets past the surface — between the boards, through a failed coating, past unflashed edges — and settles on the joist tops, in the beam, and at the ledger where the deck attaches to the building. By the time you feel a soft spot or see a board cupping, the framing underneath has usually been wet for years.
That’s what makes decks deceptive. A deck can look serviceable from above while its structure has lost significant capacity, and the failure point is almost always the connection — the ledger or the post-to-beam joint — not the part anyone can see. On an elevated deck over occupied space, the same water is also finding the ceiling below.
There’s a compliance clock too. Elevated decks are exterior elevated elements inspected under SB 721 (rentals) or SB 326 (HOAs), and any damage found has to be repaired on a defined timeline. Deck repair done properly — structure repaired, then re-waterproofed as one assembly — closes that finding for good. Done as a surface patch, it fails again before the next cycle.
A deck rarely fails where you’re standing. It fails at the connection you can’t see.
02 The D&B difference
What real deck repair involves
We repair the deck as one assembly — framing, surface, waterproofing, and railings — with one CSLB-licensed crew and one warranty. That’s what separates a deck repair specialist from a handyman replacing boards over framing that’s still rotting.
We repair the structure, not just the boards
We open up what’s failing and repair the actual frame — rotted joists, beams, posts, and ledger connections — instead of laying new decking over damage that keeps spreading underneath.
Repair and waterproofing together
Water caused the damage, so the repair isn’t finished until joist protection, flashing, and drainage are restored. One crew handles both, so there’s no seam between the structural fix and the waterproofing to fail later.
Repairs that close out inspections
We repair to current code and document the work for your SB 721 / SB 326 file — so a flagged deck is resolved on the record, not just tidied up cosmetically.
03 · Service Areas
Where We Work in California
Every city links to a dedicated local page — crews, recent projects and compliance details for that area.
Sacramento Metro
5 cities
East Bay
13 cities
North Bay
7 cities
South Bay & Peninsula
13 cities
Don’t see your city? We likely still cover it — call (916) 848-2728.
04 How a project runs
How a deck repair runs, start to finish
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01
Assessment
We inspect the surface, framing, connections, railings, and drainage, take moisture readings, and probe for rot in the joists, beams, and ledger — then tell you honestly whether it’s a repair or a rebuild.
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02
Scope & estimate
You get a written scope and a firm price, with structural findings prioritized by urgency and safety.
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03
Structural repair
We remove damaged material and repair the frame: rotted joists sistered or replaced, beams and posts repaired, ledger connections rebuilt and re-flashed to current code.
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04
Surface, waterproofing & railings
We protect the joists, restore flashing and slope to drain, replace decking or resurface, and repair or replace railings and stairs to the 42″ / 4″ standard.
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05
Documentation & handoff
We walk the finished deck with you and hand over documentation for the property’s SB 721 / 326 compliance file.
05 Scope
What we repair
Every common deck failure, on wood-framed and composite decks alike — handled in-house by one licensed crew, so structural repair and waterproofing are never split between contractors.
- Dry rot & wood decay — rotted joists, beams, and posts replaced; sound framing sistered and reinforced
- Ledger connections — the deck-to-building attachment repaired and re-flashed to current code
- Decking surface — split, cupped, splintered, or loose boards replaced; composite boards and fasteners repaired
- Stairs & landings — sagging stringers, loose treads, and failing landings rebuilt
- Railings & guardrails — loose posts re-anchored, railings repaired or replaced to the 42″ height / 4″ sphere standard
- Leaking decks — the leak traced to its source (flashing, membrane, or drainage) and repaired, not just sealed over
- Waterproofing restoration — joist protection, membrane, flashing, and slope corrected so the repair holds
- Drainage — deck drains and under-deck systems cleared, repaired, or added
- SB 721 / 326 remediation — inspection findings repaired and documented for the compliance file
Repaired to current code: CBC 1604.8.1 ledger connections · ASCE 7 load criteria · 42″ / 4″ guardrail standard
06 Investment
What deck repair costs
Deck repair is priced after an on-site assessment — the honest reason being that cost depends on how far the water reached, and that isn’t visible from the surface. Two decks that look identical from above can differ several-fold once the framing is opened up.
What drives the number
- How far the damage reached — boards only, or into joists, beams, posts, and ledger
- Deck size and how much of the framing is affected
- Wood or composite, and whether decking is replaced or reused
- Whether the leak source is contained (flashing, a drain) or the whole membrane has failed
- Stairs, landings, and railing work included
- Elevated deck over occupied space — adds waterproofing scope
- Access, staging, and phasing around tenants
- Whether repairs are tied to an SB 721 / 326 finding on a deadline
What’s included: a written scope with photo documentation, structural repair, waterproofing restoration, and compliance documentation — from one contractor, under one warranty. Final pricing follows an on-site assessment — request a free estimate, no obligation.
In the field
Deck repairs in progress
Surfaces lifted, framing repaired, and the water path corrected before the deck goes back together.
07 Project example
A recent deck repair
An apartment community in the Bay Area had its main elevated common-area deck flagged during an SB 721 inspection — soft framing at two support posts and rot along the ledger where water had been tracking for years. The decking above still looked sound. D&B removed the surface, replaced the compromised joists and repaired both posts and the beam, rebuilt the ledger connection to current code with new flashing, then protected the joist tops, restored slope and drainage, and re-decked the surface. The finding was closed with photo documentation for the property’s compliance file.
The deck looked fine — people were using it daily. The rot was in the posts and the ledger, which is exactly where it matters. Regional Property Manager · Bay Area apartment community
08 Case studies
Recent Projects, Documented
Real commercial properties — what the building needed, what we did, and what it delivered.
Deck Repair & RestorationElevated Deck Reconstruction & Waterproofing — 24 Balconies, SacramentoOpen board decks sitting directly over enclosed garages. Every gap between the boards was a route for water…View case study 
Deck Repair & RestorationTrex Deck, Walkway & Stair Replacement — 12-Unit Apartment Community, Menlo ParkResidents walked the same tired wood the whole way from the parking lot to their front door —…View case study 
Balcony RepairBalcony Replacement with Trex Composite Decking — 18 Balconies, AntelopeThe rot had already reached the beams and posts. We rebuilt the framing under every balcony and re-decked…View case study 09 Client feedback
What property managers say
Two other companies quoted us on replacing boards. D&B checked the framing first and found the real problem was the joists underneath — repaired it properly the first time.
Our inspection flagged rot on the common-area deck. They handled the framing and the waterproofing together and documented it for our SB 326 file — one contractor for all of it.
They told us straight which sections could be repaired and which needed rebuilding. We appreciated not being sold work we didn’t need.
10 FAQ
Deck repair questions
How much does deck repair cost?
It depends almost entirely on how far the water reached. Replacing a few boards is a fraction of the cost of repairing rotted joists, beams, or a failed ledger — and that damage isn’t visible until the deck is opened up. Rather than quote a number that changes once work starts, we assess on-site and give you a firm written price with photo documentation.
What does it cost to repair a deck versus replace it?
If the framing is sound and the damage is localized, repair is almost always the cheaper route. Once rot has spread through the joists, beams, and ledger, repair costs converge on replacement — and rebuilding gives you a deck with a full service life instead of one that needs work again in a few years. We tell you which side of that line your deck falls on at assessment.
Can my deck be repaired, or does it need to be rebuilt?
Most decks can be repaired. We probe the joists, beams, posts, and ledger for rot and check the connections; if the structure is sound and the damage is contained, we repair the affected members and restore the waterproofing. When the framing has lost capacity across the deck, rebuilding is safer and often costs less than repeated repairs. We’ll tell you honestly — including when the answer is that you don’t need us yet.
My deck is leaking into the space below. What should I do?
Restrict use if there’s any softness underfoot or movement in the railing, and get it assessed quickly. Water reaching a ceiling below has usually been in the framing for some time. We trace the leak to its source — flashing, membrane, or drainage — and repair that, because sealing the surface without finding the source is how decks get “repaired” twice.
Do you repair composite decks?
Yes. Composite boards resist rot, but the framing beneath them doesn’t — and water passing between the boards is what damages the joists. We repair or replace composite boards and fasteners and, more importantly, repair and protect the frame underneath so the problem doesn’t repeat.
Can you repair decks flagged in an SB 721 or SB 326 inspection?
Yes — it’s a large part of our work. We repair inspection findings to current code and provide photo documentation for your compliance file, so the finding is closed on the record. Because we handle both structural repair and waterproofing, there’s no gap between trades for the next inspection to catch.
Do tenants have to move out during deck repairs?
Almost never. We phase the work and restrict access only to the section being repaired, so units stay occupied and shared decks stay partly usable where it’s safe. We coordinate notice and scheduling with your property manager in advance.
Are you a deck repair contractor near me in California?
We’re CSLB-licensed deck repair contractors (#1060736) working across the Bay Area, Central Valley, and Sacramento. Instead of comparing deck repair companies in your area, you can call one contractor who handles the structural repair, the waterproofing, and the compliance documentation in-house — no subcontractors passing the job between them.
11 Start here
Get your deck assessed — free estimate
Send us photos or tell us what you’re seeing — a soft spot, a loose railing, boards pulling away, a stain on the ceiling below — and we’ll assess the deck and give you a free estimate covering scope, timeline, and cost. If it doesn’t need repair yet, we’ll tell you that too.
CSLB #1060736 · 9+ years · Insured & Bonded · Deck repair services across the Bay Area, Central Valley & Sacramento