Deck Builder in Concord

Key Takeaways

• Decking samples, railing systems, and color options can be seen in person at GVD's showroom on Five Star Blvd in Rocklin before anything is ordered.
• Most residential deck replacements finish in one to three weeks once permits clear.
• A deck attached to the house, or built more than 30 inches above grade, typically needs a permit and inspections.
• On GVD's pricing a redwood deck costs more than a standard composite build, because the wood tier is redwood rather than pressure-treated pine.
• A footing and framing inspection has to pass before any decking goes down, which is what sets the schedule more than the size of the deck does.

What a GVD deck project covers

Homeowners in Concord hire GVD Renovations for everything from simple ground-level decks to multi-level structures on sloped lots. We design the deck, take it through the City of Concord or Contra Costa County when a permit applies, and build it under California license #989637 with full insurance. Recent site visits have ranged from Todos Santos and Clayton Valley to nearby Walnut Creek and Blackhawk, and every design starts with a measurement of your grade and attachment point.

The point where a deck attaches to the house, the ledger, is where careless work lets water get behind the siding and into the wall framing. That connection has to be flashed correctly during construction, because once the deck boards and the wall cladding are on, the flashing detail is sealed out of sight and hard to correct later. We set and flash the ledger as part of the framing sequence, so the water path is handled before anything covers it.

Carpenters, not a rotating crew assigned the week of the build, handle the framing that everything else depends on.

What a deck costs in Concord

Height above grade is the measurement that moves a deck number the most, because it sets footing depth, how much structural support the frame needs, whether a guardrail is required, and the permit path all at once. Knowing where your deck falls on that scale before you call keeps the rest of the conversation grounded in your actual conditions.

The attachment decision, freestanding or ledger-attached, changes the permit path and the framing at the same time, which is why it gets settled first.

Composite deck replacement, standard size, $17,000 to $30,000. Trex, TimberTech, or DuraLife boards on treated framing with composite railing. No sealing cycle, and the most common build GVD does.

Wood deck replacement, redwood, $25,000 to $35,000. Redwood boards and railing over treated framing. Chosen for its natural grain rather than to save money, and it asks for periodic refinishing.

Premium PVC or stone-surface deck, $30,000 to $45,000. Full-PVC boards such as the AZEK line, or a stone or tile surface over a waterproofed substrate. The choice where maximum moisture and stain resistance matters.

Large custom deck, covered porch, or waterproofed system, $45,000 to $100,000 and up. Multi-level decks, covered porches, built-in lighting or seating, and waterproofed decks over living space. Structure and engineering set the price here more than the boards do.

For scale at the low end: a ground-level pressure-treated deck under 100 square feet runs near $5,000, which is the smallest project worth mobilizing a crew for.

For the full pricing breakdown, see our main decking page.

Two quotes for the same footprint usually differ mainly on the surface material, since the framing, footings, and railing underneath carry a similar base cost. What pushes an elevated or second-story deck higher is the deeper footing work and added structure.

Wood, composite, and PVC compared

The comparison below is about how each material behaves over a decade of ownership rather than what it costs on invoice day.

Homeowners often arrive expecting to pay a premium for composite. Against redwood that premium runs the other way, which usually simplifies the decision considerably.

Summer sun is the stress to design for in Concord. Dark composite and PVC boards run hotter underfoot than light ones, and unshaded redwood weathers faster under strong UV. For a south- or west-facing deck, a lighter board color, a shade structure, or both usually matter more than the brand.

Trex, TimberTech, and DuraLife

The fastener and railing system is worth as much attention as the board, since it determines how the finished deck looks from three feet away.

GVD installs Trex (including the Transcend and Enhance lines), TimberTech (including its AZEK full-PVC line), and DuraLife. Between them, the practical differences are color and texture, railing and hidden-fastener systems, and where a line sits on price. The bigger decision is construction: capped composite has a wood-fiber core under a protective cap, while full PVC has no wood content at all, which makes it the strongest option against moisture and staining and puts it in a higher price tier.

Do you need a permit to build a deck in Concord?

Most decks attached to the house, or built more than 30 inches above grade, require a building permit, because both conditions trigger structural and guardrail review. The City of Concord or Contra Costa County applies that test to the specific project.

A deck typically skips permitting only if it is freestanding, 200 square feet or smaller, no more than 30 inches above grade, and not the required exit from a door. Attach it to the house, build it larger, or build it higher, and it generally needs a permit and inspections.

When a permit is required, we draw the plans, submit them to the City of Concord or Contra Costa County, and schedule each inspection ourselves.

Deck code requirements and inspections

Inspections on a deck happen while the structure is open, which is the only time the connections can be verified at all.

California's residential code covers footing depth and bearing, ledger attachment to the house rim joist, joist spacing rated for the decking material's span, and guardrails for any walking surface 30 inches or more above grade. Stair rise and run and baluster spacing are checked at final inspection.

A deck is typically inspected at two or three points: footings before they are covered, framing and ledger attachment, and a final once decking, railing, and stairs are complete. Ledger flashing is a common reason for a return trip, because the house's weather-resistive barrier has to lap correctly over the ledger, so GVD flashes it to manufacturer specification on the first pass.

Elevated and second-story decks

The moment a deck rises far enough to need a guardrail and engineered footings, both the cost and the inspection sequence change.

Homes near Todos Santos and Clayton Valley sit on a mix of flat and sloping parcels, which is why the footing layout gets designed at the property rather than from a standard pattern.

Steep grades call for engineered footings poured to depth, a heavier-rated ledger connection, and code-height guardrails. The footing plan is drawn against the real slope of your lot, which is the detail that most often decides whether framing inspection passes the first time.

How we build your deck

A deck is built in a fixed order because the inspections are sequenced, and an inspection cannot happen after the thing it inspects is covered.

Each stage has to close out before the next begins, which is why a deck cannot be compressed the way some projects can. Footings and framing in particular gate everything after them.

How long a deck takes to build

Plan on one to three weeks of construction for most deck replacements, with permitting as a separate stage before crews mobilize.

Allow for plan review up front when a permit is needed; its timing depends on the current queue. Elevated decks add days for footing work and inspections compared with a ground-level build.

Maintaining your deck

Composite is often sold as maintenance-free. Refinishing-free is the accurate version, and it is still the main reason homeowners choose it.

Why Concord homeowners hire GVD Renovations

Our showroom on Five Star Blvd in Rocklin lets you stand in front of full-size deck boards, railing systems, and finish colors instead of choosing from a sample chip. Board color and grain read differently at full length than they do in your hand, and railing infill is easier to judge when you can see the whole assembly. The work in Concord is done by one accountable GVD team from the estimate through the final walkthrough, so the person who measured your ledger location is accountable for how it gets flashed. Deck permitting here runs through the City of Concord or Contra Costa County depending on where you sit, and when a permit is required, GVD handles the permitting process.

Our deck submittals are prepared for what the City of Concord or Contra Costa County plan reviewers and inspectors look for, which helps keep framing and final inspections on schedule.