Professional Grading Services in Sun Prairie, WI

Proper site grading is essential for the safety, functionality, and longevity of your property. At United Grading and Surveying, we provide expert grading services in Sun Prairie, WI, and throughout Dane, Sauk, Columbia, and Jefferson Counties. With over 25 years of industry experience, our family-owned, woman-owned business delivers high-quality workmanship for residential and small commercial projects.


Whether you're installing a new driveway, managing water drainage, or preparing for a structure like a shed or patio, our team ensures your land is graded correctly for optimal performance and appearance.

What Is Grading and Why Is It Important?

Grading is the process of shaping and leveling the ground to ensure proper drainage, stability, and surface preparation for driveways, patios, structures, and landscaping. It involves more than just moving dirt — it requires understanding slopes, water flow, and soil conditions to prevent issues like erosion, flooding, and structural damage.


Hiring a professional grading contractor ensures your project starts on the right foundation. A skilled team knows how to evaluate your land, use the right equipment, and create the correct slope and compaction for long-term success. Mistakes in grading can lead to expensive repairs later. With over 25 years of experience, United Grading and Surveying brings the knowledge and precision your project deserves — protecting your investment and your property.

Effective Site Grading

Every property has unique terrain and drainage needs. That’s why we tailor each grading project to the specific site and customer goals. Using professional equipment and proven techniques, we create durable, level surfaces designed to last.

Driveways

Proper grading is the foundation of a durable, long-lasting driveway. Whether you're installing a new gravel or asphalt driveway or regrading an existing one, correct slope and compaction are essential to prevent water pooling, erosion, and premature wear. We specialize in precision driveway grading to ensure stability, proper drainage, and a smooth finish. From new installations to replacements and repairs, our experienced team delivers results that stand the test of time.

Asphalt Patching and Grading

For spot repairs and smaller problem areas, we offer asphalt patches and grading support to level surfaces, fill holes, and maintain the integrity of your existing driveway or paved area.

Patios

Before a patio can be installed, the ground must be properly graded to ensure a stable, level surface and prevent future settling or drainage issues. We provide expert grading for patios, shaping and compacting the base to support concrete, pavers, or stonework. With over 25 years of experience, we make sure your patio is built on a solid foundation ready for years of enjoyment and low maintenance.

Pools

Proper grading is essential when preparing a site for a pool installation. Without the right slope and soil compaction, you risk uneven settling, drainage problems, and long-term structural issues. Count on us to provide expert grading for pools, ensuring the site is level, stable, and ready for construction. Whether you're installing an in-ground or above-ground pool, our team has the experience and equipment to do the job right the first time.

Shed Bases

A stable shed starts with a properly graded base. Uneven or poorly compacted ground can lead to shifting, water damage, and structural issues over time. We provide precise grading for shed bases, creating level, well-compacted surfaces that support long-term stability and proper drainage. Whether you're installing a small garden shed or a larger outbuilding, we ensure your site is prepared correctly from the ground up.

Grading for Culvert Installation and Replacement

Culverts help redirect water flow and prevent erosion or flooding. We offer both new culvert installation and culvert replacement to manage stormwater safely and efficiently. We assess the site, select the right culvert size, and complete installation with proper grading to ensure long-term performance.

Drainage Issue Solutions

Water problems can damage foundations, create mud pits, or kill landscaping. We provide targeted grading services to resolve drainage issues, directing water away from structures and creating controlled flow paths. From minor low spots to more serious erosion concerns, we develop a plan that works for your land.

Signs of Poor Grading

Not all grading work is created equal. If a contractor cuts corners or lacks the experience to properly shape and slope the land, it can lead to serious and sometimes costly problems. 

Common Issues from Improper Grading

Standing Water or Poor Drainage

If water collects near your foundation, driveway, or yard after rain, it's a sign the slope wasn’t properly established to direct runoff away from structures.

Soil Erosion or Washouts

Washed-out areas, exposed roots, or displaced gravel indicate that the land wasn’t compacted or contoured correctly, especially on sloped terrain.

Uneven or Settling Surfaces

Driveways, patios, or sheds that tilt, crack, or sink over time often point to an unstable base caused by improper grading or lack of compaction.

Muddy Areas or Dead Landscaping

Consistently soggy or muddy patches — especially near walkways or garden beds — are typically due to poor water flow design or low spots.

Flooding or Water in Basements/Garages

Inadequate grading can allow water to pool near foundation walls or flow directly toward the home, risking structural damage and interior flooding.

How United Grading and Surveying Ensures Proper Grading

At United Grading and Surveying, we understand how critical proper grading is to the health and function of your property. When we take on a grading project, whether it’s correcting past work or starting from scratch, we follow proven practices to ensure long-term success.

  • Thorough Site Assessment

We evaluate the property’s natural slope, existing drainage patterns, soil type, and structure locations before any work begins.

  • Precision Equipment and Techniques

Using modern machinery and laser levels, we shape the land to achieve correct elevation and slope based on your project’s specific needs.

  • Proper Soil Compaction

We compact the soil in layers to reduce settling and provide a stable base for driveways, patios, structures, or landscaping.

  • Custom Drainage Solutions

From swales to culverts, we design and install the right systems to safely redirect water away from your home or structures.

  • Experienced, Skilled Operators

With over 25 years in the field, our team knows what to look for, how to troubleshoot problem areas, and how to create a grade that lasts.

Correcting a poor grading job requires knowledge, precision, and the right equipment. Whether you’ve noticed issues from a previous contractor or want to make sure your project starts with a solid foundation, United Grading and Surveying is ready to help.

Serving Sun Prairie, WI, and Beyond

Based in Sun Prairie, Wisconsin, United Grading and Surveying is proud to serve the greater region, including Dane County, Sauk County, Columbia County, Jefferson County, and surrounding communities. We’re known for responsive service, straightforward estimates, and honest work that puts your property’s future first.


Grading may be the first step in your project, but it’s one of the most important. Uneven or improperly shaped land can cause serious issues down the road. At United Grading and Surveying, we take the time to assess your land’s needs and get the job done right.

Contact us today for an estimate.

Our experienced crew is ready to help you plan, grade, and protect your property with precision and care.