--- title: "Pool Construction Cost in Altadena (2026) | Keystone Connect" description: "Pool construction in Altadena, CA: $95–$240 per sq ft of water surface. A mid-size job runs $87k–$141k. Free bids from vetted builders." url: https://keystoneconnect.us/cities/altadena/pool-construction updated: 2026-10-27 --- Altadena, CA · West San Gabriel Valley # Pool construction prices in Altadena, CA: 2026 ranges A pool construction in Altadena costs $95–$240 per sq ft of water surface, with a typical mid-size pool running $87k–$141k. Small projects start around **$60k**; large or high-end work can reach **$270k** or more. As of 2026, costs in Altadena run about 8% above the LA County baseline due to Eaton Fire rebuilds and LA County rebuild permitting. Updated October 2026 Get matchedCost by size Cost per sq ft of water surface $95–$240 per sq ft of water surface ## Pool Construction Cost by Size in Altadena Totals adjusted for the Altadena market (1.08× LA County baseline). Ranges include labor, materials, permits, and contractor overhead. Pool Construction cost by size in Altadena, CA | Size | Type | Range | Low | High | | --- | --- | --- | --- | --- | | Small | Plunge / cocktail pool | up to 250 sq ft | $60k | $92k | | Medium | Standard gunite | 300–450 sq ft | $87k | $141k | | Large | Luxury w/ spa & water features | 500+ sq ft | $135k | $270k | ## What Affects Pool Construction Cost in Altadena? - Construction type (gunite vs fiberglass vs vinyl). - Spa addition. - Decking. - Equipment (pump/heater/automation). - Permit. - Soil and grading. - Altadena market premium: local pricing reflects Eaton Fire rebuilds and LA County rebuild permitting, which shifts totals about 8% above the LA County baseline. ## Get exact pool construction bids in Altadena Two or three licensed builders who work in Altadena, pricing the same scope. Tell us about your project[or call (818) 482-8365](tel:+18184828365) ## Pool Construction Sub-Type Comparisons ### Gunite Pool vs Fiberglass Pool Gunite is fully custom and lasts 50+ years at $80k–$200k; fiberglass shells install in 3–5 weeks at $55k–$120k but are size-limited (≤16 ft wide) and don't fit narrow hillside lots. ### Plunge Pool / Cocktail Pool vs Pool with Spa A plunge pool fits LA's small lots at $55k–$85k and skips most decking; adding an integrated spa pushes the project to $90k–$170k but extends use into winter. ## How to Get the Best Price on a Pool Construction in Altadena 1. Get line-itemized bids from two or three builders on the same scope; Altadena pool construction pricing commonly varies 10–25% between contractors. 2. Lock major materials and finishes before signing; mid-project change orders are the #1 cost driver on pool construction jobs. 3. Bid in shoulder seasons (Jan–Mar or Sep–Oct) when Altadena contractor schedules are open and rush premiums disappear. 4. Verify CSLB license, insurance, and bond before paying any deposit. California caps deposits at $1,000 or 10% of contract, whichever is less. ## What is a pool construction? Pool construction builds a new in-ground pool: excavation, steel and gunite or a fiberglass shell, plumbing, equipment, interior finish, coping and decking. California pools need a permit and drowning-prevention safety features. ## How to get an accurate price 1. 1.Write down the scope: size, any layout changes, the finish level, and who supplies fixtures and materials. 2. 2.Get bids from two or three licensed builders who work in Altadena, all pricing that same pool construction scope. 3. 3.Line the bids up item by item. Check allowances, permits, exclusions, and whether overhead and profit are shown. 4. 4.Before any deposit, check each builder's CSLB license and insurance. As of 2026, California caps a home improvement down payment at $1,000 or 10% of the contract, whichever is less, according to the Contractors State License Board. Already have a bid? [Grade it in two minutes](https://keystoneconnect.us/grade-my-bid) or read [how to compare quotes](https://keystoneconnect.us/pillars/how-to-read-compare-contractor-quotes). ## Questions about Pool Construction in Altadena ### How much does a pool construction cost in Altadena, CA? + A pool construction in Altadena costs $60k–$270k, with a typical mid-size pool running $87k–$141k. Per-unit pricing falls in the $95–$240 per sq ft of water surface range. ### Do I need a permit for a pool construction in Altadena? + Yes for most scopes — LADBS or the local city building department requires permits any time you move plumbing, gas, electrical, or alter structure. Like-for-like cosmetic refreshes generally don't. ### How long does a pool construction take in Altadena? + Plan for 4–14 weeks of construction in Altadena depending on size and complexity, plus 2–8 weeks for design, permits, and material lead times. ## Official sources - [Look up a contractor's license on the CSLB website](https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx) - [California home improvement contract requirements (Business and Professions Code §7159)](https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=7159) Need more answers? Visit our [contractor FAQ hub](https://keystoneconnect.us/faq). ## Get Matched with Licensed Altadena Contractors Tell us about your pool construction and we'll line up two or three licensed builders who work in the area. Los Angeles County overview [See Pool Construction costs across all LA County cities →](https://keystoneconnect.us/cost/los-angeles-county/pool-construction) ## Related Altadena Projects [All projects← Back to Altadena](https://keystoneconnect.us/cities/altadena)[AltadenaKitchen Remodel Cost →](https://keystoneconnect.us/cities/altadena/kitchen-remodel)[AltadenaBathroom Remodel Cost →](https://keystoneconnect.us/cities/altadena/bathroom-remodel)[AltadenaADU Construction Cost →](https://keystoneconnect.us/cities/altadena/adu) ## Pool Construction in Nearby Cities [Burbank, CAPool Construction Cost in Burbank →](https://keystoneconnect.us/cities/burbank/pool-construction)[Glendale, CAPool Construction Cost in Glendale →](https://keystoneconnect.us/cities/glendale/pool-construction)[Pasadena, CAPool Construction Cost in Pasadena →](https://keystoneconnect.us/cities/pasadena/pool-construction)