Serving the Central Valley Since 1987

Custom Pool Builder in Lathrop, CA

Serving Lathrop, CA and surrounding areas

Lathrop, CA

Lathrop is a city of distinct neighborhoods, and where you live shapes almost every aspect of a pool project. Homeowners in River Islands — the master-planned community built on a network of man-made waterways on the San Joaquin River delta — must obtain HOA architectural review and approval before construction can begin. River Islands HOA evaluates fencing style, equipment placement, setback distances, and design compatibility with community standards, and approval must be secured alongside the county permit process. Homeowners in other Lathrop neighborhoods generally don’t face HOA review, which simplifies the process considerably. Fetter has built custom in-ground pools across Lathrop and San Joaquin County for nearly four decades and understands how to navigate the right path for each property.

San Joaquin County issues pool permits for Lathrop via electronic submittal, with a structural setback requirement of 3 feet from the property line for pool shell construction. Inspections in Lathrop are typically available next day, which keeps construction momentum moving. Pool permit processing generally runs approximately two weeks, though this can vary. On the ground, Lathrop’s soil conditions vary by neighborhood — expansive clay is present throughout much of the area, and groundwater can be a variable in specific locations, particularly closer to the delta. Our services throughout Lathrop include custom pool design, gunite pool construction, small backyard pools, pool and spa combinations, water features, and outdoor living.

One detail Lathrop homeowners sometimes overlook: California pool code requires that a latch be installed on the inside of the garage door when the garage is part of the pool barrier. This is a standard code requirement Fetter handles as part of the pool barrier installation on every applicable project. If you’re considering a pool in Lathrop, call (209) 545-3002 to schedule your free consultation.

What Our Customers Say

★ ★ ★ ★ ★
We absolutely love our pool done by Ultimate Pools by Fetter! Ross is by far the most knowledgeable pool contractor out there and we had quotes from 6 different contractors. Ross went above and beyond researching laws to allow us to change our backyard, that other contractors wanted myself to do. He is definitely a step a head of the game at all times. I highly recommend this company to any one thinking about building a pool. Ross was with us a 100% of the way and a phone call away at all times if needed. We will have a lifetime of memories in our backyard due to what Ross created for us.
★ ★ ★ ★ ★
I hired Ultimated Pools by Fetter and they did an amazing job!! My pool looks beautiful. Sargon and his crew are fantastic. Not only they built my pools with no issues and on record time. But also it was extremely affordable compared to the competitors. Am very happy with my pool and will recommend Ultimate Pools by Fetter to anyone! Thanks Sargon and Ultimate pools by fetter!
★ ★ ★ ★ ★
Fetter did an amazing job building my dad’s pool. They answered all his questions thoroughly and explained to him in detail step by step of the process. The workers are very professional and knowledgeable, they put his worries to ease. The pool itself is so beautiful, my parents love it! 10/10 I’d recommend them!

Our Services

Professional services available in Lathrop and surrounding areas.

Custom Pool Design

Collaborative 3D pool design built around your backyard and your vision. We assess your site, develop the design with you, and handle permitting before breaking ground.

Pool Construction

Expert gunite pool construction engineered for Central Valley soil conditions. Fetter builds every pool they design — one team, one standard, from excavation to finish.

Small Backyard Pools

Creative pool design for compact lots across the Central Valley. A smaller backyard doesn't mean giving up on a pool — it means the design has to be smarter.

Pool & Spa

Custom pool and spa combinations designed for year-round use in the Central Valley. Integrated designs where pool and spa are conceived together from day one.

Water Features

Custom pool water features in the Central Valley — sheer descents, waterfalls, grottos, and deck jets designed as part of the pool from the very first conversation.

Outdoor Living

Complete backyard transformations in the Central Valley — pool decking, outdoor kitchens, pergolas, fire features, and shade structures designed as one unified space.

About Ultimate Pools By Fetter

Ultimate Pools by Fetter has been designing and building custom in-ground pools across the Central Valley since 1987. Based in Modesto, the Fetter team serves Modesto and surrounding communities throughout Stanislaus, San Joaquin, Tuolumne, Calaveras, and Merced Counties.
Over nearly four decades, Fetter has built a reputation recognized by building officials, structural engineers, and pool industry professionals as one of the best in the region. Every pool is custom-designed and built to the specific conditions of the property — including the soil, drainage, and site characteristics that vary across the Central Valley.
Fetter handles the complete scope of every project — design, construction, water features, outdoor living, and backyard transformation — with one team and one standard of quality from concept through completion.

Learn More About Us →

Frequently Asked Questions

Does Fetter build pools in Lathrop, CA? +
Yes. Fetter builds custom in-ground gunite pools throughout Lathrop and San Joaquin County. We have direct experience with Lathrop’s permit process, River Islands HOA requirements, local soil conditions including groundwater variables near the delta, and the pool barrier code requirements that apply in Lathrop. Lathrop is part of our core service area.
Do I need HOA approval to build a pool in River Islands? +
Yes. River Islands is a master-planned community with an active HOA that requires architectural review and approval before pool construction can begin. The review covers fencing style and materials, equipment placement and screening, setback distances, and design compatibility with community standards. HOA approval must be obtained alongside the county permit process. Homeowners in other Lathrop neighborhoods are generally not subject to HOA review. Fetter works with River Islands homeowners on HOA submittal documentation as part of the project process.
What is the setback requirement for pools in Lathrop? +
San Joaquin County requires a minimum 3-foot structural setback from the property line for pool shell construction in Lathrop. Additional setbacks may apply to decking, equipment placement, and other structures. River Islands HOA may impose additional design constraints on top of county minimums. Fetter verifies all applicable setbacks during the site assessment before design is finalized.
How long does pool permit processing take in Lathrop? +
Pool permits in Lathrop are issued through San Joaquin County via electronic submittal. Processing typically runs approximately two weeks, though timing can vary. Inspections in Lathrop are generally available next day, which keeps construction moving without long waits between required inspection stages. River Islands HOA review adds additional time that runs alongside the county permit process.
Is groundwater a concern for pool construction in Lathrop? +
It depends on the specific property. Lathrop’s proximity to the San Joaquin River delta means groundwater can be a variable in certain areas, particularly closer to River Islands and the waterway system. On properties where groundwater is encountered during excavation, the pool design must include hydrostatic relief provisions. Fetter assesses groundwater risk during the site visit and designs accordingly.
What is the pool barrier garage door latch requirement in Lathrop? +
California pool barrier code requires that when a garage door forms part of the barrier around a pool, a latch must be installed on the inside of that door. This prevents the garage from being used as a bypass around the barrier. Fetter handles this as part of the standard pool barrier installation on every applicable Lathrop project.
What soil conditions should I know about for pool construction in Lathrop? +
Lathrop sits on expansive clay soil throughout much of the city, which swells when wet and shrinks when dry, creating seasonal ground movement that must be engineered for in the pool’s structural design. Groundwater is an additional variable in areas closer to the delta. Fetter’s site assessment identifies both conditions on each specific property and incorporates the necessary design provisions before construction begins.