
Pool & Spa Remodeling in Ontario
New pools, spa additions, replastering, tile and coping, and full pool remodels. Designed, permitted and built by our own crews.
Pool & Spa Remodeling built for Ontario properties
George and William B. Chaffey founded Ontario in 1882 as an irrigation colony, and its backbone was Euclid Avenue, a boulevard of twin roadways divided by a central mall that rises on a long, easy incline from the Southern Pacific tracks toward the mouth of San Antonio Canyon. The older city holds eight designated historic districts, where Craftsman bungalows stand near Mediterranean, Tudor and Victorian houses. To the south, the 13-square-mile Ontario Ranch occupies land the city annexed in 1999 from the former San Bernardino County Agricultural Preserve, where dairy farms had shaped the landscape since the early 1900s and are now giving way to master-planned neighborhoods. Beneath most of the city lies alluvial sand that the Safety Element treats as a wind-related hazard, so a backyard plan here weighs historic review, dust and wind during excavation, and exactly where a pool, its barrier fence and an ADU may sit on the lot.
Two eras share the city: the Chaffey brothers' original subdivision pattern, still intact around the historic downtown and Euclid Avenue, with early tracts such as College Park, subdivided into 48 lots in 1914, and Armsley Square, laid out in 1924, and Ontario Ranch to the south, where former dairy properties are being converted to master-planned neighborhoods. Development Code Table 6.01-1 sets the minimum traditional single-family lot at 18,000 square feet in the AR-2 district, 10,000 in RE-2 and RE-4, and 7,200 in LDR-5.
We are a design-build team, which means the people who draw your project are the people who build it. Design, engineering, permits and construction run through one project manager and our own crews, so nothing gets lost in a handoff between a salesperson and a subcontractor. We are licensed, bonded and insured, CSLB license #1119054.
Permits in Ontario: Under the Development Code's residential standards, a pool, spa or pond 1.5 feet deep or more cannot be built in a front yard, must sit at least 3 feet from side and rear property lines and must be enclosed by a decorative nonclimbable fence or wall at least 5 feet high, while diving boards, slides, waterfalls and decorative rockscapes need at least 5 feet from side and rear lines. ADU applications go to the Building Department electronically through the city's Citizen Portal Access, and the city's ADU handout caps a detached unit at 850 square feet for a studio or one bedroom and 1,000 square feet for two or more, generally at 16 feet tall, with 4-foot side and rear setbacks and 6 feet of separation between detached structures. Exterior alterations to historic buildings, including homes in the city's eight designated historic districts, need a Certificate of Appropriateness reviewed by Planning staff, the Historic Preservation Subcommittee and the Historic Preservation Commission, or a Planning waiver for minor alterations.
Permit details checked September 2026 against City of Ontario. Rules change, so we confirm them again for your parcel.
What We Build
- Pool setbacks and 5-foot barrier fencing
- Certificate of Appropriateness review in historic districts
- Wind and dust control during excavation
- Detached ADU sizing and 6-foot structure separation
- New gunite pool and spa construction
- Full pool remodels and replastering
- Pebble, quartz and plaster interior finishes
- Waterline tile and coping replacement
- Raised and attached spas with spillways
- Baja shelves, benches and sun ledges
- Water features, fire bowls and sheer descents
- Equipment upgrades, heaters and automation
- Pool decking in pavers, concrete or travertine
- LED lighting and salt-water conversions
Local Conditions
What building in Ontario actually involves
Every city in Southern California builds differently. These are the things that change the scope, the schedule or the budget on Ontario projects.
The Safety Element describes the alluvial sand beneath most of Ontario as very susceptible to erosion, with strong winds driving it onto property, and its policies require dust-control best management practices on all excavation and grading and prohibit excavation and grading during strong wind conditions as defined by the Building Code, which brings the wind forecast into any dig schedule.
Because of the local topography and the nearby Cajon Pass, the Safety Element names Santa Ana winds as by far the city's greatest fire hazard, with increased risk in older portions of Ontario, although its 2025 CAL FIRE-based map shows no Fire Hazard Severity Zone inside city limits.
Much of the central and western city, roughly from Fourth Street south to Riverside Drive and west of Haven Avenue, lies inside the Safety Element's mapped zone of subsidence due to groundwater pumping, liquefaction is also listed among local hazards, and the city follows state guidelines and the California Building Code to decide when a project needs a geotechnical investigation.
Properties inside the Airport Influence Area of the LA/Ontario International Airport Land Use Compatibility Plan are subject to that plan's requirements under the Development Code, a check worth making alongside zoning before an addition or ADU is designed.
Investment
What this costs in Ontario
Real Southern California ranges, not a teaser number. Every project is priced line by line after we have seen the site.
New pool construction
$70,000 to $150,000+
What moves it: size and shape, spa, water and fire features, decking material, automation, and how much access and grading the site needs
Pool remodel and resurfacing
$15,000 to $45,000
What moves it: finish choice (plaster versus pebble or quartz), tile and coping replacement, new equipment, and whether the deck is being replaced at the same time
Paver patio and hardscape
from about $13,000
What moves it: square footage, paver type, base preparation, drainage, and any steps or retaining involved
Your number depends on your lot, your access and your finishes. We walk the site, then price every line so you can see exactly where the budget goes.
Get a line-item price for your Ontario propertyHow We Build
Your Ontario project, step by step
Site Review
We walk the property, check access, soil and slope, and confirm what the yard can actually take.
Design & 3D
You see the pool in 3D before anything is dug, with finishes, tile and decking chosen.
Plans & Permits
We draw the plans, handle engineering where the site needs it, and pull the permits. In Ontario that submittal goes to City of Ontario Community Development, Building Department.
Excavation & Shell
Dig, steel, plumbing and gunite. This is where site access and grading matter most.
Finishes
Tile, coping, decking and your chosen interior finish go in.
Startup & Handover
We fill, balance the water, commission the equipment and walk you through every control.
Ontario Questions
Common questions from Ontario homeowners
Who issues the permits for this work in Ontario?
City of Ontario Community Development, Building Department. Under the Development Code's residential standards, a pool, spa or pond 1.5 feet deep or more cannot be built in a front yard, must sit at least 3 feet from side and rear property lines and must be enclosed by a decorative nonclimbable fence or wall at least 5 feet high, while diving boards, slides, waterfalls and decorative rockscapes need at least 5 feet from side and rear lines. ADU applications go to the Building Department electronically through the city's Citizen Portal Access, and the city's ADU handout caps a detached unit at 850 square feet for a studio or one bedroom and 1,000 square feet for two or more, generally at 16 feet tall, with 4-foot side and rear setbacks and 6 feet of separation between detached structures. Exterior alterations to historic buildings, including homes in the city's eight designated historic districts, need a Certificate of Appropriateness reviewed by Planning staff, the Historic Preservation Subcommittee and the Historic Preservation Commission, or a Planning waiver for minor alterations. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.
What makes building in Ontario different?
Two eras share the city: the Chaffey brothers' original subdivision pattern, still intact around the historic downtown and Euclid Avenue, with early tracts such as College Park, subdivided into 48 lots in 1914, and Armsley Square, laid out in 1924, and Ontario Ranch to the south, where former dairy properties are being converted to master-planned neighborhoods. Development Code Table 6.01-1 sets the minimum traditional single-family lot at 18,000 square feet in the AR-2 district, 10,000 in RE-2 and RE-4, and 7,200 in LDR-5. One local condition that shapes the work: The Safety Element describes the alluvial sand beneath most of Ontario as very susceptible to erosion, with strong winds driving it onto property, and its policies require dust-control best management practices on all excavation and grading and prohibit excavation and grading during strong wind conditions as defined by the Building Code, which brings the wind forecast into any dig schedule.
Which parts of Ontario do you work in?
All of it, including College Park, Armsley Square, Rosewood Court and El Morado Court. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.
What does a pool or spa project cost in Ontario?
New pool construction: generally $70,000 to $150,000+ across Southern California. What moves it is size and shape, spa, water and fire features, decking material, automation, and how much access and grading the site needs. We give line-item pricing after seeing the site rather than quoting a number over the phone.
How long does a pool remodel take?
A straightforward replaster with new tile and coping usually runs three to five weeks. A full remodel that includes new decking, equipment and features typically runs eight to twelve weeks. Site access and permit timing are the two things that move that most.
How long does a new pool take to build?
Most new pool builds run about three to five months from permit to first swim. Hillside sites that need engineered retaining or difficult access sit at the longer end of that range.
Should I replaster or fully remodel?
If the shell and plumbing are sound and you only dislike the surface, replastering with new tile and coping is the efficient choice. If the equipment is aging, the deck is cracked or the shape no longer suits how you use the yard, a full remodel costs less than doing it in two separate phases.
Do you self-perform the work?
Yes. Our own crews handle the build rather than passing it to a rotating set of subs, which is why the schedule and the finish standard stay consistent.
More services in Ontario
Ontario Guides
Planning guides for Ontario homeowners
Costs, materials and process notes from our own projects.
Building a Pool in Northridge: Costs, Soil and the LADBS Process
A new pool in Northridge typically runs $85,000 to $165,000 all-in with decking and equipment. The tract lots are generous, the soil is workable, and the real variables are access, spa and deck square footage.
Read guideVan Nuys Pool and Backyard Guide: Costs on the Valley Floor
A new pool in Van Nuys runs $75,000 to $145,000, and a pool-plus-backyard package $110,000 to $220,000. Flat lots keep excavation honest; older service panels and gas meters are where budgets slip.
Read guideTravertine vs Porcelain Pavers: The Honest Comparison for SoCal Yards
Travertine installs at roughly $22 to $30 per square foot, porcelain at $24 to $34. The real difference is heat, staining and how each one handles a chlorinated pool deck over ten years.
Read guidePool Coping Compared: Cast Concrete, Natural Stone and Porcelain
Coping runs $28 to $55 per lineal foot in concrete, $55 to $110 in natural stone and $60 to $120 in porcelain. On an average pool perimeter that is a $2,500 to $11,000 decision.
Read guidePlanning a pool or spa project in Ontario?
Sit down with your project manager, go through the details, and get an accurate estimate for your property. We call you back within one business day.
Licensed, bonded & insured · CSLB license #1119054