Spa Builders Costa Mesa, CA — Custom Spillover & Standalone Spas
Custom gunite spas designed for Costa Mesa's real lot sizes — from compact spillovers in Eastside cottages to standalone retreats in Mesa Verde and full pool-spa combinations across College Park and Mesa del Mar.
Custom Spas
COSTA MESA SPA BUILDERS
Custom Spa Construction Across Costa Mesa
Costa Mesa lots are tight enough that a custom spa is often a better fit than a full pool. South Coast Metro townhomes have backyards too small for a 16x32 build but plenty of room for an 8x8 raised spa with a tile wall. Eastside cottages and 1950s ranches frequently can not fit both a pool AND a spa, so a spillover-attached spa with a small pool, or a standalone spa with a generous deck, is the right answer.
Werth Builders has been building gunite spas in Costa Mesa since 1994. Spillover, standalone, attached, raised, and infinity-edge — whatever fits the lot and the look you are after.
- Free on-site consultation with honest recommendations
- Spillover, standalone, raised, and attached configurations
- Tile, plaster, and equipment to match the existing pool
- All City of Costa Mesa permits handled in-house
- Marine-grade equipment specs available for coastal lots
SPA OPTIONS
Custom Spa Configurations We Build
Every Costa Mesa backyard is different. Here are the configurations we work with most.
Spillover Spa
The classic — spa raised above pool with sheeting water spilling over a tiled wall. Visually striking and functionally efficient (one heater serves both).
Standalone In-Ground Spa
Custom gunite spa, no pool needed. Built to your exact dimensions and finish — common for backyards that already have a pool, or yards that don't fit a full pool.
Attached Spa
Spa built into the same shell wall as the pool, sharing a tile cap. Cleanest look for modern architecture and infinity-edge designs.
Raised Spa with Tile Wall
Spa elevated above deck height with a finished stacked-stone, tile, or board-formed concrete wall. High-impact visual centerpiece.
Spa Retrofit
Adding a spa to an existing pool. We tie into existing plumbing or add dedicated equipment, match the new spa finish to a fresh pool resurface.
Equipment & Automation
Variable-speed pumps, low-NOx heaters, and smart controllers — including marine-grade specs when the property requires them.
CUSTOM vs PREFAB
Should I Build Custom or Buy a Prefab Spa?
Both work. Both have homeowners that swear by them. Here is the honest comparison so you can decide what fits your Costa Mesa backyard.
Prefab / Portable Spa
Drop-in acrylic or rotomolded shell, 110V or 220V plug-in, no permitting in most cases. Lasts 10-15 years. Fastest path to soaking but lower resale value and cannot be customized.
$8K–$20K InstalledCustom Gunite Spa
Built into the ground, finished with the same tile and plaster as a pool, lasts 30+ years. Fully custom dimensions, depth, seating, and equipment. Adds property value.
$25K–$50KSpillover Spa (with new pool)
Best-in-class look and the most efficient option if you are already building a pool — shared equipment, shared finish, single permit application.
$15K–$30K (incremental)Spa Retrofit (existing pool)
Adding a spa to a pool that does not currently have one. Plumbing tie-ins, partial pool drain, structural and finish work. Mid-range cost, high-impact change.
$20K–$40KWHY HOMEOWNERS HIRE US IN COSTA MESA
Spa Building Tuned to Costa Mesa
Building a custom spa here means understanding this city specifically — climate, soils, permitting, and the way Costa Mesa homeowners actually use their backyards.
South Coast Metro Compact Builds
South Coast Metro townhomes and tighter contemporary single-family lots fit a 6x6 or 7x8 spa where a full pool will not. We design vertical, low-footprint installs with raised tile walls, sound-tuned equipment, and configurations that respect zero-lot-line setbacks.
Eastside Cottage Spas
Eastside Costa Mesa cottages often have 6,000-7,500 sf lots with mature trees and tight side yards. A standalone gunite spa or an attached-to-existing-pool spa fits where new pool construction does not. We bring in materials by hand, conveyor, or crane as the lot requires.
Mesa Verde Pool-Spa Pairings
Mesa Verde's 8,000+ sf country-club-frontage lots support beautiful raised spillover spas integrated with view-pool designs. Negative-edge spas with stacked-stone walls and fire-bowl edges are popular here.
Mid-Century Spa Retrofits
Many original College Park, Mesa del Mar, and Halecrest pools never had a spa. We retrofit attached or spillover spas onto existing 1960s pools as part of a wider remodel, tying into existing plumbing or adding dedicated equipment as needed.
OUR PROCESS
From First Call to First Soak
Five clear steps — same process whether you are adding a spa to a new pool, retrofitting an existing one, or building a standalone.
Free On-Site Consultation
We come to your Costa Mesa home, walk the yard, talk through how you actually want to use the spa, and give honest feedback on what fits.
Design & Selections
3-D rendering for full new builds. For retrofits, we bring tile, finish, and coping samples to your home so you can see them in your own light.
Itemized Quote & Permits
Fixed line-item pricing. We pull every City of Costa Mesa permit and any Coastal Development Permit the property requires.
Construction
Excavation, steel, plumbing, gunite, tile, plaster, equipment. Daily on-site supervision. Most spa projects run 4-8 weeks.
Fill, Heat & Walk-Through
We fill the spa, balance the chemistry, run the heater up, and walk you through equipment, automation, and care.
SPA BUILDER FAQs
Common Questions About Building a Spa in Costa Mesa
A standalone custom gunite spa in Costa Mesa typically runs $22,000 to $48,000, depending on size, raised walls, tile selection, equipment, and finish. Adding a spillover spa to an existing pool is usually $20,000 to $40,000.
A standalone custom spa takes 4-8 weeks from excavation to first soak. A spillover retrofit on an existing pool runs 5-9 weeks because we time the spa shotcrete with a partial pool drain.
Prefab spas (acrylic shells with self-contained equipment) are faster and cheaper up front (typically $8,000-$20,000 installed). Custom gunite spas cost more but last 30+ years, match your pool finish, are built to your exact yard dimensions, and add real property value. For permanent installations on owned homes — particularly in Mesa Verde and Eastside — custom gunite is usually the right answer.
Yes. Any spa over 24 inches deep, or any spa with electrical, plumbing, or gas, requires a City of Costa Mesa Building Safety permit. Per California HSC §115922, new spas require at least 2 of 7 approved drowning-prevention safety features. Costa Mesa actively partners with Hoag's Project Wipeout on water-safety education.
Yes — even when the original pool was not designed for a spa. We tie new spa plumbing into existing equipment (or add dedicated spa equipment), match the spa finish to a fresh pool resurface, and permit all structural work. Mid-century pool spa retrofits are one of our most common Costa Mesa scopes.
Yes. Werth Builders is a fully licensed California pool contractor (CSLB #777-575, B-1 General + C-53 Swimming Pool), bonded, and insured for general liability and workers' compensation. We have been building and remodeling in Southern California since 1994. Always verify any contractor's license at cslb.ca.gov before signing.
We work with several specialty pool-and-backyard finance partners that offer competitive fixed-rate loans and HELOC alternatives. We can introduce you, but we never sell financing as part of our quote — there is no markup or kickback on financed projects.
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