Lot Grading & Excavation
in SAN MARCOS, TX
San Marcos Elite Grading & Excavation handles residential and commercial grading, excavation, site preparation, and drainage correction projects across Hays County and the surrounding I-35 corridor. We complete over 150 grading and excavation projects annually — from custom home pads on raw acreage to drainage correction on established residential lots — serving builders, developers, and homeowners throughout San Marcos and the greater Central Texas region. Our licensed equipment operators specialize in lot grading and re-sloping, land clearing, French drain installation, swale engineering, and precision house pad construction.
Central Texas receives approximately 36.55 inches of rainfall annually, with peak storm events in May and September routinely delivering 4+ inches in a single system. Without properly engineered lot grades, custom swales, and functioning drainage corridors, that water has nowhere to go except into foundations, crawl spaces, and neighboring properties.
We serve San Marcos, Kyle, Buda, Wimberley, New Braunfels, Dripping Springs, and communities throughout Hays, Caldwell, and Guadalupe counties.
Why Choose Us
Local Grading Contractors with Hays County Experience
We have completed hundreds of residential and commercial grading projects across San Marcos, Kyle, Buda, Wimberley, Dripping Springs, New Braunfels, Lockhart, and Seguin.
Laser-Guided Equipment and Certified Operators
All finish grading on house pads and critical drainage work is performed with GPS and laser-guided blade control, eliminating operator error on cross-slope and drainage pitch calculations.
Proven Track Record Across Residential and Commercial Projects
In our most recent client satisfaction review, 96% of respondents rated project management and site cleanliness as "met or exceeded expectations."
Get a FREE On-Site Estimate
What Grading and Drainage Problems Do We Fix?
Yard Flooding and Negative Lot Grade
Negative lot grade — where the ground slopes toward the structure rather than away from it — is the single most common drainage defect on residential properties in Central Texas. The Insurance Information Institute estimates that water damage is the second-most-common homeowner insurance claim in the United States, and a significant portion of those claims trace back to improper site drainage.
On San Marcos lots east of I-35, blackland clay's low permeability makes the problem worse — water that cannot drain away from the foundation has nowhere to go except into the structure. We correct negative grade through cut-and-fill re-sloping, establish a minimum 6-inch drop over the first 10 feet away from any foundation per IRC standards, and armor the swale channels where erosion risk is highest.
Foundation Settlement and
Differential Movement
When site drainage fails on expansive clay, the soil beneath a foundation experiences repeated wet-dry cycles that cause differential swelling and shrinkage. The Foundation Performance Association reports that over 60% of all residential foundations in Texas experience some degree of movement, and the majority of those cases involve inadequate site drainage as a contributing factor. We address this by regrading surrounding lots to direct water away from the slab perimeter, installing French drains where subsurface water migration is occurring, and building up fill compacted to 95% standard Proctor density around the foundation zone.
Erosion on Sloped and Cut Lots
Lots on the Hill Country side of San Marcos — particularly those west of Rattlesnake Road and along the Ranch Road 12 corridor — frequently require significant cut-and-fill work to establish a buildable pad. Exposed cut slopes left unprotected erode rapidly under Central Texas storm events, undermining pad edges and depositing sediment into drainage ways. We stabilize cut slopes through benching, compacted fill placement, and temporary erosion control measures in compliance with the Texas Commission on Environmental Quality's Construction General Permit requirements.
Standing Water in Low Areas and Rear Yards
Low spots that collect and hold water after rain events are both a nuisance and a long-term liability. Standing water against a fence line, in a rear yard, or along a property line accelerates wood rot, creates mosquito habitat, and signals a drainage system that is not moving water off the lot efficiently. FEMA estimates that just one inch of standing water in a home causes an average of $25,000 in damage — proper swale and grade design keeps that water in motion and off the property. We survey the full lot, identify collection points, and engineer a drainage solution that moves water to the street, a designated drainage easement, or an approved outfall location.
Drainage Failures on Builder and Subdivision Lots
Production builder lots and older subdivisions in San Marcos frequently develop drainage conflicts as landscaping matures, fences are installed, and neighboring grades change over time. Common failure points include blocked swale easements along shared lot lines, improperly graded driveways that redirect street runoff onto the property, and settling fill around utility trenches that creates low spots adjacent to the foundation. We diagnose these system-level drainage failures and implement corrections that account for how the entire lot — not just the problem area — moves water.
What Grading and Excavation Services Do We Offer?
Lot Grading and Resloping
Lot grading is the foundational service for any site that needs to move water correctly — whether that's a raw lot before construction, an existing home with drainage problems, or a commercial site preparing for impervious cover. According to the National Association of Home Builders, improper drainage is cited in over 40% of new construction defect claims. We establish finish grades with laser-controlled equipment, engineered to meet both local code minimums and the site-specific drainage objectives identified in the initial survey. This service covers residential lots, commercial pads, and subdivision common areas.
Site Preparation for New Construction
Site prep for a custom home or commercial building in Hays County involves clearing, rough grading, utility trench excavation, and house pad construction — all sequenced to accommodate the framing and foundation trades that follow. The I-35 growth corridor has driven a sustained surge in new custom home construction in San Marcos and surrounding communities, and proper site preparation is the most schedule-critical phase of any build. Delays at site prep cascade into every subsequent trade. We work directly with custom home builders and general contractors to sequence site prep around permitting timelines and foundation pour schedules.
French Drain Installation
French drains are the primary subsurface drainage solution for lots where surface regrading alone cannot move enough water — typically on flat lots, lots with heavy clay content that limits soil infiltration, or lots adjacent to uphill neighbors who discharge runoff onto the property. A properly engineered French drain system can reduce subsurface water pressure against a foundation by up to 90%, according to data published by the University of Minnesota Extension. We design and install perforated pipe systems in gravel-filled trenches, sized and sloped to the specific hydraulic load of each site.
Excavation Services
General excavation covers everything from foundation trenching and utility corridor digging to pond construction, detention basin work, and raw land grubbing for new development. Our excavation equipment fleet includes hydraulic excavators in the 20- to 45-ton class, allowing us to handle both precision residential digging and volume commercial earthwork without subcontracting. Excavation is typically the first phase of any significant site development project and sets the conditions for every subsequent grading and drainage operation.
Drainage Correction and Swale Installation
Drainage swales — shallow, vegetated channels designed to carry surface water from one point to another — are the most cost-effective drainage tool on most residential sites. The EPA's stormwater management guidelines recognize vegetated swales as a proven Best Management Practice for controlling runoff velocity and volume. We design swales to carry the site's design storm flow without erosive velocity, sized based on the watershed area draining to each channel and the soil conditions along the swale corridor.
House Pad Construction
A properly built house pad is the single most important factor in long-term foundation performance on Central Texas clay soil. We build compacted structural fill pads to meet the geotechnical specifications common in Hays County — typically 95% standard Proctor compaction in 8-inch lifts, with subgrade preparation that includes removal of any organic material or unsuitable soil before fill placement begins. Pad elevations are set to provide positive drainage away from all four sides of the structure and to meet finished floor elevation requirements established in the site plan.
CENTRAL TEXAS SITE PREP BUILT TO LAST
Get your lot grade right the first time — before the foundation goes in.
Get a FREE On-Site Estimate
Specialty and Add-On Services
Retaining Wall Grading and Slope Stabilization
Lots with significant grade change — common on the Hill Country-side properties west of San Marcos along Ranch Road 12 and Lime Kiln Road — often require retaining structures to hold cut slopes and create usable yard space. We perform the grading and earthwork component of retaining wall projects, including slope cutting, backfill compaction, and drainage integration behind the wall.
Retaining walls without a properly engineered drainage layer behind them are the most common failure point in residential slope stabilization — hydrostatic pressure buildup in saturated soil can generate lateral forces exceeding 60 pounds per square foot against an unrelieved wall face.
Driveway Grading and Culvert Installation
Driveways that cross roadside ditches or traverse low areas of a property require culvert installation to maintain drainage continuity. Hays County road rules require culvert installation to maintain ditch flow on county road frontages, and undersized or improperly installed culverts are a common cause of road shoulder erosion and driveway washout. We grade driveway pads to shed water to the sides, size and install corrugated metal or HDPE culverts to the site's drainage requirements, and compact the driveway sub-base to support the intended traffic load.
Topsoil and Fill Dirt Services
Final topsoil placement is the last step before landscaping on any graded site. We source clean fill dirt and import topsoil from vetted suppliers and place it to the depth and specification required by each project. On sites where the native soil has been disturbed by grading or construction, a 4- to 6-inch layer of quality topsoil is the baseline for establishing turf coverage that will hold the grade in place and prevent erosion between storms.
Grading and Excavation FAQs
How long does a typical residential lot grading project take in San Marcos?
Most single-family residential lot regrading projects are completed in one to three days, depending on lot size and the extent of fill work required. House pad construction for a new custom home typically runs two to four days including subgrade prep, fill placement in compacted lifts, and finish grading. Projects that require import fill material may add one to two days for delivery scheduling. We provide a written project timeline at contract signing based on a site-specific assessment.
Do you pull permits for grading and excavation work in Hays County?
Grading and excavation permits are required for most new construction projects in the City of San Marcos and for projects that disturb more than one acre in unincorporated Hays County under the Texas Commission on Environmental Quality's Construction General Permit. We identify permit requirements during the initial site assessment and coordinate permit applications directly with the City of San Marcos Development Services Department or Hays County as applicable.
What warranties do you provide on completed grading work?
We warrant all finish grade work against defects in workmanship for one year from project completion. Drainage systems including French drains and swales carry a two-year workmanship warranty. Warranty claims related to post-construction site disturbance by other trades or landscaping contractors are evaluated on a case-by-case basis.
How much does lot grading cost in San Marcos, TX?
Residential lot regrading typically ranges from $2,500 to $8,500 depending on lot size, the volume of fill required, and the complexity of the drainage solution. House pad construction for a custom home on a raw lot ranges from $6,000 to $20,000+ depending on pad size, fill depth, and site access conditions. We provide fixed-price quotes after a site visit — phone estimates without a site assessment are not accurate on Central Texas terrain.
What is the difference between rough grading and finish grading?
Rough grading establishes the approximate elevations and contours of a site — moving the bulk of the earth to get close to the design grades shown on the site plan. Finish grading follows rough grading and brings the site to precise final elevations, typically within one-tenth of a foot of plan, with laser-controlled equipment. Both phases are required on new construction projects; existing residential lots typically only require finish grading unless significant fill is being added.