Gunite, Fiberglass or Vinyl Liner: Which Pool Should You Build in Los Angeles?
Three ways to hold water in a backyard, compared on what they allow you to design, what they survive in the Valley sun and soil, what they cost to keep, and how each gets permitted.
Build gunite (concrete) when you want a pool shaped to the yard, a raised spa, a tanning shelf, a deep end or a hillside site, and you want it to last for decades; it is what nearly every custom Los Angeles pool is. Consider fiberglass when a standard shell shape fits a flat, reachable yard and you want a smooth, low-chemical surface with a short install. Vinyl liner pools are rare in Southern California: the liner is the weak point in heat, sun and hard water. Right Image Builders builds gunite pools; 2026 planning ranges across the San Fernando Valley are $65K–$95K for an essential pool, $95K–$150K for a pool with raised spa and deck, and $150K–$250K+ for a resort backyard. Fiberglass and vinyl shells are priced by their makers and installers; compare delivered totals that include excavation, equipment, decking, electrical and permits.
Right Image Builders designs, engineers, permits and builds gunite pools, spas and decks across the Valley under CSLB #1021284 with one fixed written price after a free design visit.
What each pool is
Gunite (and its cousin shotcrete) is concrete sprayed over a steel-reinforced excavation, then finished with tile, coping and plaster, quartz or pebble. It takes any shape, depth or elevation, carries a raised spa, a baja shelf, a vanishing edge or a swim-up bar, and is engineered to the soil it sits in, which matters on Valley clay and on hillsides.
Fiberglass is a one-piece shell made in a factory, trucked to the site and set by crane into an excavation, then backfilled and plumbed. The surface is smooth and non-porous, so it uses fewer chemicals and does not need replastering, but the shape is whatever the catalog offers and the size is limited by what a truck can carry.
Vinyl liner pools are a steel or polymer wall kit with a vinyl sheet liner over a sand or vermiculite floor. They are common in cold climates where freeze-thaw and budget favor them; in Los Angeles the liner's exposure to sun, heat and hard water, and the need to replace it periodically, make them uncommon.
Gunite vs. fiberglass vs. vinyl at a glance
| Gunite (concrete) | Fiberglass | Vinyl liner | |
|---|---|---|---|
| Shape, size, depth | Any; raised spas, shelves, beach entries, deep ends, hillside structures | Catalog shapes; width limited by highway transport; set depths | Rectangles and standard kits; shallow floors |
| 2026 planning range (Right Image Builders, gunite) | Essential $65K–$95K · pool, spa and deck $95K–$150K · resort backyard $150K–$250K+ | Priced by the shell maker and installer; compare the delivered total | Priced by the kit installer; compare the delivered total |
| Lot access | Excavator and gunite rig access needed; hillside lots engineered with caissons or retaining | Crane swing and truck access for a one-piece shell | Panels carried in |
| Interior surface | Plaster 10–15 years, quartz or pebble longer; refinish when it wears | Gelcoat; smooth; no replaster, repair is specialized | Liner typically replaced on a cycle of years; punctures and fading |
| Longevity of the structure | Decades; the standard for Los Angeles pools | Decades for the shell if backfilled and set correctly | Walls last; the liner does not |
| Maintenance | Brushing, chemistry; porous plaster holds more algae than gelcoat | Lowest chemical use; easy to clean | Gentle chemistry to protect the liner |
| Spa | Attached raised spa, spillway, shared equipment | Separate fiberglass spa or attached models in some lines | Usually a separate unit |
| Time on site | Roughly 8–16 weeks of construction once permits are issued | Days to set, weeks for decking, equipment and finish | Weeks |
| Permits and safety | Building, electrical and plumbing permits; inspections at steel, bonding, pre-plaster and final; Pool Safety Act features | Same permits and safety features; engineering for the set | Same permits and safety features |
| Best for | Custom design, spas, hillsides, resale, longevity | Flat reachable yards, standard shapes, low upkeep | Tight budgets in cold climates; rarely the right call here |
Why nearly every Los Angeles pool is gunite
Three local facts push the decision. The yards are irregular: a 7,000 sq ft Valley lot with a house, setbacks, a patio and trees leaves a pool shape that is rarely a catalog rectangle, and hillside lots south of Ventura need a structure engineered to the slope. The climate is hot and sunny for most of the year, which punishes vinyl and rewards a hard, refinishable surface. And the market expects it: buyers and appraisers in Sherman Oaks, Encino and Studio City read a well-built gunite pool with a raised spa as part of the house.
Gunite also carries the features people actually want from a Los Angeles backyard: a spa that spills into the pool, a tanning shelf with umbrella sleeves, a deep end for diving, a vanishing edge on a view lot, and decking, fire features and an outdoor kitchen that make the resort tier. The pool cost guide shows what is inside each tier and how the neighborhoods differ.
When fiberglass is the right answer
- A flat, open yard with crane access and a standard shape that fits the space, typical of the larger tract lots in the West Valley.
- Low upkeep as the priority: the gelcoat surface needs fewer chemicals and no replastering.
- A short on-site schedule after the shell arrives, if the factory lead time works for you.
- A modest pool without a spa, where the catalog shape is the design you wanted anyway.
What you give up is the shape, the depth, the attached raised spa and the engineering freedom on a difficult lot; and the shell must be set, backfilled and plumbed exactly right or it can shift.
Why vinyl liner rarely makes sense in Southern California
Vinyl liner pools exist to make a pool affordable where freeze-thaw cycles crack concrete and the season is short. Los Angeles has the opposite climate: ten months of sun that fades and stiffens vinyl, water hardness that stains it, and a long swimming season that wears it. The liner is a recurring cost and a puncture risk, and a liner pool does not carry the resale value of a gunite pool here. We do not build them.
Permits and the Pool Safety Act
Every new residential pool or spa in California needs building, electrical and plumbing permits and inspections (steel and plumbing before gunite, bonding and electrical, pre-plaster, final) through LADBS inside the City of Los Angeles or the city building department in Burbank, Glendale, Beverly Hills and Pasadena. The California Swimming Pool Safety Act requires at least two of seven drowning-prevention features on a new or remodeled pool: an enclosure, removable mesh fencing with a self-closing gate, an approved safety cover, exit alarms on doors to the pool, self-closing and self-latching doors, an alarm in the pool, or another approved device. The requirement applies to all three pool types, and it is inside our fixed price.
How we recommend deciding
Measure the yard, check the access and the slope, and decide whether a spa and a custom shape are part of the plan. If they are, or the lot is a hillside, build gunite. If a catalog shape fits a flat reachable yard and low upkeep matters most, price a fiberglass shell delivered and installed against a gunite fixed price for the same footprint. Our free design visit covers setbacks, easements, slope, utility runs and access, and ends with one fixed written price for the shell, equipment, deck and permits.
Sources (checked October 2026): California Swimming Pool Safety Act, Health and Safety Code §115920–115929: a new or remodeled residential pool or spa must have at least two of the seven listed drowning-prevention safety features (effective January 1, 2018); Los Angeles Department of Building and Safety, plan check and permit information; Right Image Builders service and neighborhood pages (2026 planning ranges, timelines, permit authorities). Cost figures are Right Image Builders' 2026 planning ranges from its service and neighborhood pages.
Frequently Asked
Questions
For a modest pool in a flat yard the installed totals can be close, because excavation, equipment, electrical, decking and permits are the same trades for both; the shell price alone is not the comparison. Our gunite planning ranges are $65K–$95K for an essential pool, $95K–$150K with a raised spa and deck, and $150K–$250K+ for a resort backyard. Ask a fiberglass installer for a delivered-and-installed total that includes the same items.
A gunite shell lasts for decades; its plaster finish is refinished when it wears, typically after 10–15 years, and quartz or pebble finishes last longer. A fiberglass shell also lasts for decades if set and backfilled correctly, and its gelcoat is not replastered. A vinyl liner is the short-lived part of a liner pool and is replaced on a cycle of years.
Usually not. A one-piece shell needs crane access and a flat, stable excavation; hillside lots need soils engineering, caissons or retaining walls and a structure designed for the slope, which is gunite work. That is why the pools south of Ventura Boulevard are concrete.
Building, electrical and plumbing permits, with inspections at steel and plumbing before the gunite, bonding and electrical, pre-plaster and final, through LADBS inside the City of Los Angeles or the city building department elsewhere. The Swimming Pool Safety Act adds at least two of seven safety features for any new or remodeled residential pool or spa.
It is rarely the right choice. The liner fades, stiffens and stains under ten months of sun and hard water, it punctures, and it is replaced periodically; a liner pool also does not carry the resale value of a gunite pool here. Liner pools make sense in freeze-thaw climates with short seasons, not in the Valley.
Roughly 8–16 weeks of construction once permits are issued: excavation and steel in the first weeks, the gunite shell and its cure, tile, coping and decking, equipment, plaster and fill. Design, engineering and plan check come first, and hillside lots add engineering time before the dig.
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Find Out What Your Yard
Can Hold
Free design visit across the San Fernando Valley: setbacks, slope, access and utility runs checked, and one fixed written price for the shell, equipment, deck and permits.
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