Welcome to Poseidon’s Custom Pools, Union Township, NJ’s top destination for bespoke swimming pool creation. We pride ourselves on designing beautiful pools that complement your home and elevate your outdoor experience. Whether you envision a private retreat for solitude or an exciting hub for social gatherings, our expert team is devoted to making your backyard dreams come true. With premium components and cutting-edge methods, we build pools that combine visual appeal with reliable quality. Start your path to luxury with Union Township’s finest builders today!
At Poseidon's Custom Pools, your satisfaction drives everything we do. We take the time to understand your needs and collaborate closely with you, ensuring your pool project not only meets but exceeds your expectations.
With more than 25 years in the pool industry, our skilled team brings unmatched expertise to every project in Union Township, NJ. We stay ahead of the curve with the latest trends and technologies to provide innovative, high-quality solutions.
We’re committed to excellence. By using premium materials and employing the region’s top craftsmen, we ensure your pool is not just visually stunning but built to stand the test of time.


Our expert swimming pool contractors are dedicated to bringing your vision to life. Whether you desire a classic pool, a contemporary oasis, or a unique water feature, we have the expertise to make it a reality.
Is your existing pool in need of a transformation? We excel in pool renovation and remodeling, updating and enhancing your pool to meet your current preferences and needs.
Ensure your pool remains in pristine condition with our comprehensive maintenance and repair services.From regular cleaning to equipment repairs, we provide solutions to keep your pool functional and beautiful.
Elevate your pool experience with custom features such as waterfalls, spas, lighting, automation systems, and more. Our team can create a pool that suits your lifestyle and desires.
We’re proud to bring our custom in-ground pool installations, gunite pool expertise, and pool renovation services to communities throughout Eastern PA, NJ, and DE. Whether you’re dreaming of a saltwater pool system with LED lighting or need pool leak detection and repair, we’ve got you covered. Here are the areas we serve:
Our design team is considered to be the best swimming pool and outdoor living designers in the region.
No customer will be delivered a Poseidon Custom pool with out 100% satisfaction!
Our crews are fully licensed and insured in Pennsylvania, New Jersey & Delaware.
We are at your service and will take your calls at any time and any day of the week.







A significant portion of Union Township sits on carbonate bedrock, which can be prone to sinkholes. If your home is in this overlay zone, we must perform a geotechnical investigation before digging your pool to ensure the ground is stable. We handle this coordination with the township engineer to guarantee a safe, long-lasting build.
Zoning ordinances typically require that your pool be located in the rear or side yard and set back at least 20 to 50 feet from property lines, depending on your specific zone (e.g., RA or RR). We review your specific survey during our initial consultation to determine the exact allowable location for your pool.
Yes. Union Township has strict limits on “impervious coverage” (the percentage of your lot covered by structures and pavement). We perform a detailed Lot Coverage Calculation including your house, driveway, new pool, and patio to ensure your design stays within the permitted percentage (often 15-20%) without needing a variance.
Yes. If you are installing a heated pool—which we highly recommend for extending the season in Hunterdon County—you will need a mechanical/plumbing permit for the gas line and an electrical permit for the heat pump. We manage all these sub-code permits as part of our full-service package.
Many parts of Union Township contain dense Brunswick shale, which is difficult to excavate with standard equipment. Poseidon’s Custom Pools utilizes heavy-duty excavators and rock-breaking attachments to efficiently dig through this hard terrain, preventing timeline delays that less experienced builders might face.
To meet the International Swimming Pool and Spa Code (ISPSC) adopted by NJ, your pool must be enclosed by a barrier at least 48 inches high. In Union Township, this fence must have self-closing, self-latching gates. We often install “deer fencing” that meets these safety codes while blending into the rural landscape.
If your pool project disturbs more than 5,000 square feet of soil (which is common for larger custom builds with extensive patios), we must file a plan with the Hunterdon County Soil Conservation District. We handle this certification to ensure your site is compliant with state environmental regulations.