Sitework Estimating in McAllen

Stormwater detention sizing isn't a fixed input in Texas sitework estimating - it's a jurisdiction-by-jurisdiction number that has moved substantially in recent years. Houston, in particular, updated its detention requirements to align with Harris County Flood Control District standards following the adoption of NOAA's Atlas 14 rainfall data, and detention volume requirements in the city increased sharply as a result - a change that directly grows the size (and cost) of the detention pond a site plan has to accommodate. A sitework estimate built on outdated detention rates doesn't just miscalculate one line item; it undersizes the earthwork and grading scope for the whole site.

Our sitework estimating services confirm current detention requirements for the project's specific jurisdiction before pricing cut/fill and grading quantities - not a statewide assumption that may be years out of date in the city that actually matters.

What's in a Sitework Estimate

• Earthwork and grading cut and fill volumes calculated from existing and proposed grade surfaces, quantified in cubic yards with import/export requirements flagged where the site doesn't balance on its own.
• Stormwater detention and drainage detention pond sizing calculated against the current rate required by the specific city or county, not a default assumption, along with storm drain, inlet, and culvert quantities.
• Underground utilities water, sanitary sewer, storm drain, and dry utility trenching, priced by linear footage, pipe material, and depth, coordinated so trench conflicts between systems are flagged before they become a field problem.
• Paving and hardscape parking lots, drives, sidewalks, and curbs, quantified by area and pavement section thickness.
• Site improvements retaining walls, fencing, and landscaping/irrigation scope where included in the sitework package.

Why Detention Requirements Change the Estimate

A detention pond isn't a fixed percentage of site area it's sized to a specific volumetric rate (acre-feet per acre of impervious or disturbed area) set by the governing jurisdiction, and that rate has changed meaningfully in some of Texas's largest markets in the past several years. A larger required detention volume means more excavation, more pond footprint taken out of otherwise developable or parking area, and in some cases a fundamentally different site layout than what a smaller, older detention standard would have allowed. Confirming the current rate before pricing earthwork isn't a compliance footnote here it changes how much dirt actually has to move.

Sitework by Project Type

Residential subdivisions. Mass grading, utility infrastructure, and detention sized per the governing jurisdiction's current subdivision standards.

Commercial and multifamily sites. Site-specific grading, parking lot paving, and detention sized to the site's impervious cover, often requiring closer coordination with civil engineering than a standalone residential lot.

Industrial sites. Heavier utility infrastructure and larger-scale earthwork, often including specialized pad preparation see our Industrial Construction Estimating Services page for how equipment-driven scope is handled separately.

Software and Standards

Sitework and earthwork takeoffs are built using AGTEK, Bluebeam, and Civil 3D surface modeling, with detention and drainage quantities checked against the governing jurisdiction's current stormwater design criteria and cross-referenced with RSMeans and current Texas labor and material rates.

McAllen Construction Market Overview

McAllen features a dynamic construction market. We provide detailed estimates tailored to local material pricing and labor rates.

McAllen Permitting

Our estimates account for standard McAllen municipal building codes and local compliance requirements.