Work Services The Estate About Press Contact
Aerial view of the custom pool, grotto and waterfalls at Drake's YOLO Estate, built by Ultimate Water Creations

The pool imagined by you, engineered by us.

Custom pools, grottos, and waterfalls in Los Angeles, since 1981.

Custom projects typically begin at $150,000.

Scroll
45 Years
Designing & Building
$150K–$5M
Project Range
Thousands
Of Projects Delivered
In-House
Own Rock Craftsmen
As Seen On
The Today Show Animal Planet ABC Los Angeles Times AQUA Magazine LUXURY POOLS+ Outdoor Living THE HUFFINGTON POST
★ United Aqua Group · Gold Award 2026 Best of Houzz · 20242023201920172016 See all press
Night view of the lagoon pool and illuminated waterfalls at Drake's YOLO Estate
Featured Project

The pool behind Drake's YOLO Estate.

When one of Hidden Hills' most photographed compounds needed water worthy of the architecture, the work was ours: a multi-level lagoon, grotto bar, swim-up cave, and waterfalls engineered to anchor the entire estate.

It's the kind of project we've quietly delivered across four decades, for clients who expect the backyard to be the best room in the house.

Grotto swim-up bar with tiki torches at Drake's estate Rock grotto with spiral staircase at Drake's estate Full estate view of the pool and waterfalls
Tour the estate
One studio

Design, engineering, and construction under a single roof.

Modern acrylic-wall pool at dusk in front of a contemporary Los Angeles estate
01

Design

Concepts that solve the site before a shovel touches the ground. Infinity edges, acrylic walls, glass tile, fire and water.

Explore Design
Twilight infinity pool overlooking the Los Angeles skyline
02

Build

Gunite construction engineered for hillsides and impossible lots. Four decades of structures that don't move.

Explore Build
Naturalistic rockwork pool with waterfalls and lush landscaping
03

Rockwork & Remodel

Hand-carved artificial rock, waterfalls, and grottos, plus full transformations of dated pools into modern showpieces.

Explore Rockwork

Selected work

Full Portfolio
Grotto swim-up bar at Drake's YOLO Estate in Hidden Hills
Hidden Hills
YOLO Estate Grotto
Twilight infinity pool with skyline view in Sherman Oaks
Sherman Oaks
Twilight Infinity
360-degree infinity pool in Brentwood
Brentwood
360° Infinity Pool
Contemporary acrylic-wall pool at dusk
Los Angeles
Acrylic-Wall Pool
Cliffside vanishing-edge pool in Rancho Palos Verdes
Rancho Palos Verdes
Cliffside Edge
View from inside a rock grotto over a pool
Beverly Hills
Grotto Cave Retreat
Award-winning hillside pool with 40-foot water slide, infinity edge and Baja ledge by Ultimate Water Creations Gold-medal renovation project with waterfalls and spa by Ultimate Water Creations
United Aqua Group · Awards of Distinction 2026

Gold Award, Renovation.

Our most recent honor: a national Gold Award for a project that cost over $1M and took more than a year to build. It meant retaining a steep hillside, then carving in a 40-foot water slide, cascading waterfalls, a shallow children's pool, a Baja ledge, and an infinity edge on both pool and spa.

The kind of brief most builders walk away from. The kind we live for.

The Process

From raw hillside to finished water.

A pool is the easy part. The reason an estate water environment costs what it does is everything underneath it: caissons drilled into unstable hillside, hand-sculpted gunite rockwork, structural engineering that has to outlast the house. Here is one build, start to finish.

Simi Valley Reservoir-View Grotto & Waterfalls Hand-sculpted rockwork · multi-cascade · infinity spa over the valley
1Simi Valley pool under construction — hand-sculpted gunite rockwork being shaped by excavator on a raw hilltop
Structure & Rockwork
Gunite shell and artificial rockwork sculpted by hand on a bare hilltop pad.
2Simi Valley pool shell complete with scaffolding, overlooking the reservoir valley before water and finishes
Shell & Detailing
Cave, spillways and basin formed; carving and texture work before finish.
3Finished Simi Valley grotto with cascading waterfalls into a deep-blue pool, stone steps and lush planting
Completed
Multiple waterfalls, a swim-through grotto and an infinity spa over the valley.
In Their Words

Five stars, decade after decade.

★★★★★

"His rockwork is simply the most realistic in the industry, and his water environments the most impressive. Ultimate Water Creations is a first-class design/build firm."

Rush Leisure Inc. · Trade partner, 16+ years
★★★★★

"I was referred by one of the top designers in Hollywood. Mr. Goldstone designed the most spectacular pool with waterfalls I've ever seen, and it came out even better than on paper. Truly an artist."

Edward L. · Hillside estate
★★★★★

"A complex job: multiple waterfalls, a pool, a jacuzzi and a cave grotto. The finished product is absolutely stunning, a lush tropical paradise that never fails to floor my guests. UWC is the only choice."

Lawrence M. · Pool, spa & cave grotto
★★★★★

"I wish I had called Don first. After a false start with another company, Don made the whole process easy, his own team of rock craftsmen, his eye for the whole backyard. He truly loves what he does."

Alayna A. · Northern California
★★★★★

"Don created paradise in our backyard. Fifteen years later, it still feels like a tropical island vacation. Thank you, Don, for your vision and creativity."

Lisa N. · 15-year client
★★★★★

"Once you see his work, you'll be unable to hire anyone else. As Picasso was to painting, Don is to pools. If you can dream it, he can build it, and it will be more beautiful than anything you could hope for."

Ellen G. · Pool, waterfalls & grotto
Begin

Let's build something worth coming home to.

Tell us about your property. We'll meet you on-site, walk the space, and show you what's possible. Consultations are complimentary and unhurried.

Request a Consultation
Or call the studio directly · 310.446.1614