Deck Repair in San Antonio: Repair or Replace? Start With a Safety Inspection

Deck repair in San Antonio starts with what is underneath the deck.A deck can look tired and still be sound, or look fine and be close to failing. The boards you walk on tell you the least. The decision to repair or replace comes from what holds the deck up: the connection to the house, the posts and footings, the framing and the hardware.

Inspect the structure before the surface

Walk the deck, then get underneath it with a flashlight and a screwdriver. The American Wood Council's DCA 6 deck construction guide is the prescriptive guide the City of San Antonio names for decks that are not engineered, and it doubles as a practical checklist.

• Ledger board. This is the board bolted to the house. DCA 6 calls for flashing where a ledger meets a wood-framed wall, and it does not allow ledgers attached to brick or stone veneer, hollow masonry, cantilevered floor overhangs or bay windows. It also calls for a ledger of at least 2x8 lumber fastened with ½-inch lag screws or bolts with washers, and it prohibits lead anchors. Look for rot, gaps, missing bolts or nails used where bolts belong.
• Lateral connection. DCA 6 applies to decks attached to the house so they resist sideways movement. If the deck sways when you shift your weight, treat that as a structural finding.
• Posts and footings. Look for leaning posts, posts set directly in soil, cracked or heaved footings and wood touching the ground that was never rated for ground contact. For new decks, DCA 6 sets 6x6 posts as the minimum and calls for footings on undisturbed soil at least 12 inches below the ground surface or below the frost line, whichever is deeper.
• Joists, beams and hangers. Probe the ends of joists, the tops of beams and anywhere water sits. Soft wood that the screwdriver sinks into is rot. DCA 6 does not allow a beam that is simply fastened to the side of a post; the beam has to bear on a notched post or sit in a post cap.
• Fasteners and connectors. DCA 6 calls for hot-dipped galvanized, stainless steel, silicon bronze or copper fasteners with preservative-treated lumber, galvanized or stainless connectors, and matching materials. Flaking, swollen or rust-streaked hardware is a red flag.
• Guards and stairs. DCA 6 requires a guard on decks more than 30 inches above grade, at least 36 inches tall with openings that will not pass a 4-inch sphere. Push hard on guard posts and handrails, and check stair stringers where they bear on the ground.

If anything structural moves, is soft or is missing, keep people off the deck until it has been evaluated.

Check the stairs against current benchmarks

Stairs take hard use and are often the weakest part of an older deck. DCA 6 calls for stairs at least 36 inches wide, risers no taller than 7¾ inches, treads at least 10 inches deep, a graspable handrail 34 to 38 inches high on any stair with four or more risers, and a light at the top landing that illuminates the stairs. It also says stringers should not bear on a concrete pad or patio that is not founded at footing depth. An older deck may predate some of these details, but a stair that falls well short of them is worth fixing even when the rest of the deck is sound.

A step-by-step walkthrough

1. Clear the surface and look for boards that are split, cupped or spongy underfoot.
2. Grab each guard post at the top and push. Movement you can see is a finding.
3. Go underneath and start at the house: ledger, flashing, bolts and the wall behind them.
4. Work outward along the joists, probing the ends and anywhere boards or hangers meet.
5. Check every post where it meets the footing and where it meets the beam.
6. Finish with the stairs: stringers, treads, the landing at grade and the handrail.
7. Photograph what you find so a contractor can give you a more specific estimate.

Deck repair in San Antonio: when fixing it makes sense

Repair is usually reasonable when the problems are limited to the surface or to a few parts you can replace cleanly:

• A handful of split, cupped or soft boards over solid joists
• Loose guard posts on framing that is otherwise sound, re-attached with proper hardware
• Rusted connectors or fasteners on framing that is not rotted
• Worn finish, splinters or a faded surface

Re-decking (new boards on old framing) only pays off if the framing has plenty of life left. Putting new boards on joists that are starting to rot means tearing them up again.

Do the repair the way a new deck would be built. DCA 6 requires cut ends of treated lumber to be field-treated with an approved preservative such as copper naphthenate, and it calls for connectors and fasteners of the same corrosion-resistant material, so new hardware should match what it touches.

When replacement is the safer call

If two or more of these show up together, a rebuild usually makes more sense than chasing one repair after another.

What drives deck repair cost

Deck repair cost depends more on what is hidden than on the size of the deck, so an honest number comes after someone has been underneath it. These are the factors that move it:

• How far the rot goes. A few boards is a small job. Joists, beams or a ledger turn it into framing work.
• The ledger. DCA 6 calls for removing siding where a ledger is installed and flashing the connection, so ledger work often involves the house wall as well as the deck.
• Height and access. Taller decks mean more bracing and stair work, and at 48 inches or more above grade the City requires an engineer or architect letter to clear inspections.
• Matching materials. Older board profiles and colors can be hard to match.
• Permits and design. A rebuild that crosses the City's size or height thresholds needs a permit, construction details and inspections.
• Lights, outlets or a sink. These need separate trade permits pulled by licensed trade contractors.

Ask for an estimate that separates structural work from surface work so you can see where the money goes.

San Antonio conditions that speed up wear

Long, hot summers dry out and check wood boards, and sudden heavy rain soaks the framing in the same places again and again. Soil matters too. The Texas Department of Licensing and Regulation's technical bulletin on expansive soils explains that clay soils swell when wet and shrink when dry, which can lift or settle what sits on them. Footings that have moved are one reason a deck that was level years ago now slopes or pulls away from the house. If you are rebuilding, ask how the footings will be designed for your lot.

The same bulletin names surface drainage, plant choices and sprinkling practices as part of keeping soil moisture steady. Around a deck, that means keeping sprinklers off posts and footings and making sure downspouts do not empty under the deck. If a storm or a falling limb damaged your deck, the same inspect-first approach applies to storm damage rebuilding in San Antonio.

Maintenance that keeps a repaired deck sound

• Keep the gaps between boards clear so water drains through instead of sitting on the joists.
• Aim sprinklers away from posts, the ledger and the underside of the deck.
• Re-check guard posts and stair handrails each spring and after severe storms.
• Refinish wood boards on the schedule the stain or sealer maker gives.
• Plan heavy loads with care. DCA 6 puts hot tubs and other large concentrated loads outside its scope, so a hot tub on an existing deck needs its own design.

Permits for a rebuild

The City of San Antonio Development Services Department (DSD) Information Bulletin 151, revised May 2025, says a covered or uncovered residential deck must be permitted when the deck or its roof exceeds 300 square feet or the deck is more than 30 inches above grade at any point. It allows a design by a Texas-licensed engineer or architect, or a design that follows the adopted International Residential Code deck section and DCA 6. The bulletin also says lighting, outlets, sinks and gas lines need separate trade permits pulled by state-licensed trade contractors registered with the City, and decks 48 inches or more above grade need an engineer or architect letter to clear framing and foundation inspections. Historic districts can add a review. Other cities, such as Alamo Heights and Boerne, and many HOAs have their own rules, so confirm before work starts.

For an existing home, IB 151 sends one-story decks of 1,000 square feet or less through the Residential Improvements Permit application in the BuildSA portal, and larger or two-story decks through the Residential Building Permit application with plan review. A homeowner can apply as the owner after certifying they will live in the home for more than 12 months; if you plan to sell soon, a licensed contractor has to apply. DSD says small-deck applications are normally approved within one to two days, though a zoning or Office of Historic Preservation review can apply depending on location. The City inspects the foundation, framing and final, and DCA 6 says a deck should not be used until final inspection and approval. Our San Antonio building permit guide explains who applies for which permits, and construction drawings and permit coordination can be part of a rebuild scope.

Before anyone digs new footings, call 811. The Railroad Commission of Texas says homeowners, excavators and contractors are required by law to call 811 at least two days before digging, and the call is free.

A note on the DCA 6 edition

As of October 2026, the edition AWC posts is based on the 2015 International Residential Code (copyright 2018). The City's bulletin points to the latest adopted code, and its May 2025 revision updated its links to the 2024 ICC codes, so the code and plan reviewer have the final word where they differ.

Questions to ask before you hire

• Will you inspect underneath, including the ledger and footings, before you quote?
• Which parts of the work are structural, and does the job need a permit?
• What fasteners and connectors will you use with treated lumber?
• How will cut ends of new lumber be treated?
• Who calls 811 before footings are dug?
• If lights or outlets are involved, which licensed trade contractor pulls that permit?

214 Veteran Solutions is a veteran-owned general contractor in San Antonio that plans and manages projects and coordinates licensed trade contractors for homes across San Antonio and nearby communities. If you are weighing a different structure altogether, compare a deck, a covered patio and a pergola on shade, rain cover, slope, upkeep and San Antonio permits in Deck, Covered Patio or Pergola: Choosing for a San Antonio Yard. For a ground-level option, look at patterns and sealing in our stamped concrete patio guide. Fence posts face the same soil and moisture issues, so the checks in our fence repair or replacement guide will look familiar. Our patio, deck and pergola services page explains how we scope outdoor work.

Get a second set of eyes on your deck

If you want a second opinion on what you found, call veteran-owned 214 Veteran Solutions at (210) 796-3695, request an estimate, or book an estimate consultation.