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Deck Cost Calculator
Answer eleven questions about your deck and this calculator gives you a realistic cost range for La Jolla — then shows you the line items behind it, and tells you whether San Diego is going to ask you for a permit.
Why your estimate is what it is
What drives deck costs in La Jolla
Deck cost in La Jolla is driven by four things in roughly this order: how big it is, what the boards are, how far off the ground it sits, and how hard the site is to work on. Everything else — railing, stairs, lighting, built-ins — sits on top of those. This calculator prices all of it and shows its working, using published 2026 figures for coastal San Diego rather than national averages.
Size
Cost scales almost linearly with square footage, but the fixed costs — permit, mobilisation, one flight of stairs — do not. That is why small decks look expensive per square foot and large ones look cheap.
Height above grade
The biggest single multiplier after size. A deck more than 30 inches up needs a permit, a 42-inch guard and proper framing. An elevated deck runs 25% to 70% more per square foot than the same deck on the ground.
Decking material
Pressure-treated is the cheapest board and the most demanding to keep. Composite and PVC cost more up front and almost nothing after. Tropical hardwood costs the most to buy and to install.
Railing
On a small deck the railing can be a quarter of the job. Wood runs $35 to $85 a linear foot, composite $45 to $90, cable $70 to $150 and glass $100 to $200 or more.
Ground conditions
Flat is cheap. A sloping yard means stepped footings. A canyon lot or a coastal bluff means engineered footings, a geotechnical report, and in La Jolla the possibility of a Coastal Development Permit.
Site access
A crew that can back a truck to the work area builds faster than one carrying every board through a side gate. It shows up as labour.
What could push your price higher
- A second-storey or hillside build, which needs engineered drawings
- A bluff-top or ocean-front lot, where a Coastal Development Permit and geotechnical work apply
- Cable or glass railing instead of wood or composite
- Multiple levels, each with its own beams, footings and steps
- Rot or bad flashing discovered when the old deck comes off
- Hand-carry-only access
What could bring it down
- Keeping the walking surface under 30 inches, which avoids the permit and the guard entirely
- A simple rectangle with straight board runs and no mitred borders
- Wood railing instead of cable or glass
- Building in one level rather than two
- Open access for the truck and a place to put a bin
Turn the estimate into a real number
This calculator works from published 2026 cost figures for coastal San Diego. It cannot see your framing, your flashing, how a crew would reach the work, or what is behind the siding at the ledger — and those are exactly the things that decide a real price. We will come out, measure, and give you a written scope with no pressure attached.
Book a free site visitFrequently asked questions
How much does a deck cost in La Jolla?
Most La Jolla decks land between $45 and $90 a square foot installed, all in. A 320 square foot composite deck a few feet off the ground with railing and one flight of stairs typically runs $20,000 to $30,000; the same footprint in pressure-treated wood runs closer to $15,000 to $21,000. Ground-level platform decks are considerably cheaper because they skip the permit, the guard and most of the framing.
Do I need a permit to build a deck in San Diego?
Generally yes, once the deck is more than 30 inches above grade or sits over a storey below. Below that threshold, most residential decks are exempt. Deck permits usually trigger a full plan review; published figures for San Diego run from roughly $400 to $1,800. Confirm with City of San Diego Development Services, because La Jolla is inside the coastal zone and that can add a review of its own.
How tall does deck railing have to be in California?
Where a guard is required — any walking surface more than 30 inches above what is below it — California sets the height at 42 inches. That is higher than the 36 inches used in much of the country, and it is a common reason out-of-state railing kits fail inspection here.
Is composite worth it over wood?
On this coast, usually. Composite costs roughly 25% to 40% more to build and almost nothing to maintain, while a wood deck within a mile of the ocean wants cleaning and re-sealing every year or two. The wood and composite calculators both show a ten-year cost of ownership so you can compare the real numbers rather than just the quotes.
How long does a deck last in La Jolla?
Less than the same deck inland. Salt air and UV together are hard on boards, and harder still on fasteners — galvanised joist hangers near the ocean can corrode within a few years. Expect 12 to 18 years from a well-maintained wood deck, 25 to 30 or more from composite or PVC on a sound frame, and plan on stainless or heavy-coated hardware either way.
Do I need a Coastal Development Permit for a deck in La Jolla?
Possibly. La Jolla sits inside the California coastal zone, and work that expands a building footprint can trigger a Coastal Development Permit. Like-for-like replacement is often treated differently from new construction, and bluff-top lots get the most scrutiny — those need geotechnical work covering bluff retreat and sea level rise. Costs range from a few thousand dollars to tens of thousands and timelines run months rather than weeks, so ask the City early.
Related calculators
Planning the whole project? Start at the La Jolla deck cost calculator hub, or read more about our Deck Installation service.