Building Guide

Homeowner's Manual: Adding a Well and Septic System to Your Lot

Building on an undeveloped lot in Cache Valley? Here's what you need to know about installing a well and septic system before construction begins.

What You Need to Know Before Building on an Undeveloped Lot

If you've found the perfect piece of land in Cache Valley but it doesn't have municipal water or sewer connections, don't worry—you're not alone. Many of the most beautiful building sites in Northern Utah require a private well and septic system. Here's everything you need to know about the process.

Understanding When You Need a Well and Septic System

Not every lot in Cache Valley has access to city water and sewer lines. Rural properties, larger acreages, and parcels outside city limits typically require private systems. Before purchasing land, it's important to understand what utilities are—and aren't—available. Your builder can help you evaluate a lot's feasibility before you commit.

Step 1: Soil Testing and Perc Tests

Before any septic system can be designed, the soil on your lot must be tested. A perc test (percolation test) measures how quickly water drains through the soil, which determines what type of septic system will work on your property. Cache Valley soils vary widely, so this step is essential.

• A licensed engineer or soil scientist performs the test
• Results determine septic system type and placement
• Testing is typically required by the Bear River Health Department
• Poor perc results don't necessarily disqualify a lot—alternative systems may be available

Step 2: Septic System Design and Permitting

Once soil testing is complete, a septic system can be designed to meet your home's needs. The system size depends on the number of bedrooms and expected water usage.

• Conventional systems use a septic tank and drain field
• Advanced systems (like mound or pressure-dosed systems) are used when soil conditions require them
• Permits are obtained through the Bear River Health Department
• Your builder coordinates with engineers and the health department throughout the process

Step 3: Drilling a Well

If municipal water isn't available, you'll need a private well. Well drilling in Cache Valley varies depending on depth, geology, and location.

• A licensed well driller assesses the site and determines the best drilling location
• Well depth in Cache Valley typically ranges from 100 to 400 feet, depending on the area
• Water quality testing is required to ensure the well meets safety standards
• A pressure tank and pump system are installed to deliver water to your home
• Wells require a permit from the Utah Division of Water Rights

Step 4: Setback Requirements and Lot Layout

Wells and septic systems must meet specific setback distances from each other, from your home, and from property lines. These requirements influence where your home can be positioned on the lot.

• Minimum distance between well and septic: typically 100 feet
• Setbacks from property lines, driveways, and structures also apply
• Working with an experienced builder ensures your home design accounts for these requirements from the start

Step 5: Budget Considerations

Adding a well and septic system is an additional cost that should be factored into your overall building budget. Here's a general idea of what to expect in Cache Valley:

• Well drilling and equipment: $8,000–$20,000+ depending on depth
• Septic system installation: $8,000–$25,000+ depending on system type
• Soil testing and engineering: $1,500–$3,000
• Permits and inspections: $500–$1,500

These costs vary by location and site conditions. Your builder should include these in your comprehensive project estimate so there are no surprises.

Step 6: Ongoing Maintenance

Once installed, both systems require regular maintenance to ensure longevity:

• Septic tanks should be pumped every 3–5 years
• Well systems need annual water quality testing
• Keep heavy vehicles and structures away from drain fields
• Monitor water pressure and pump performance regularly

Why It Matters to Work with an Experienced Builder

Installing a well and septic system adds complexity to a home build, but it's a routine part of building in rural Cache Valley. An experienced builder like Duke Building Co. coordinates the entire process—from soil testing to final inspections—so you can focus on designing your dream home.

Thinking about building on an undeveloped lot? Contact Duke Building Co. to discuss your property and get expert guidance on making it build-ready.