Building TheGroundworkFor Tomorrow
Providing dependable site development, infrastructure and construction services with precision, safety and uncompromising quality across Pennsylvania.
Our Core Capabilities
From initial site clearing to final paving, we self-perform the critical scopes that other contractors subcontract out — delivering greater control, tighter schedules, and superior outcomes.
Site Development
Comprehensive land clearing, grading, and preparation for commercial and industrial developments. We transform raw land into shovel-ready sites.
Excavation & Earthmoving
Precision mass excavation, cut-and-fill operations, and earthmoving using modern high-capacity equipment. Every cubic yard moved with accuracy.
Utility Installation
Underground water, sewer, stormwater, gas, and electrical conduit systems designed and installed to municipal and commercial specifications.
Concrete Construction
Foundations, flatwork, retaining walls, curbing, and structural concrete poured with uncompromising attention to spec compliance and finish quality.
Road Construction
Full-depth roadway construction including subbase preparation, base course, binder, and wearing surface for commercial and municipal projects.
Commercial Infrastructure
Complete site package delivery including stormwater management, erosion control, parking areas, and ADA-compliant site improvements.
Project Management
End-to-end project coordination, scheduling, subcontractor management, permitting, and owner representation for complex multi-phase developments.
Commercial Infrastructure
Bridges, culverts, retaining structures, and major earthworks for municipal, county, and state infrastructure improvement programs.
Built For Bigger Challenges
Six reasons why Pennsylvania's most demanding commercial developers trust Mayfield on their most critical projects.
Self-Performance Advantage
We own our equipment and employ our crews. No subcontracting critical work — you get direct accountability and the cost savings that come with it.
Pennsylvania Roots
Over three decades operating exclusively in Pennsylvania. We know local geology, regulations, municipalities, and inspectors like the back of our hand.
Safety-First Culture
Industry-leading EMR rating. Every crew member receives weekly safety training. Our record speaks before any contract is signed.
Engineering Precision
Licensed professional engineers on staff. We review, value-engineer, and optimize plans — often catching issues that save clients significant money.
On-Time Delivery
We've never missed a contractual completion date in 12 consecutive years. Our schedule adherence is a point of corporate pride and financial discipline.
Fleet & Technology
GPS-equipped machines, 3D machine control, drone surveying, and a modern heavy equipment fleet keep us ahead of every schedule.
The Story Behind Every Project
Mayfield Site Contractors, Inc. was born in the summer of 1994 from a single conviction: that Pennsylvania's commercial developers deserved a site contractor they could genuinely rely on. Robert Mayfield Sr., a third-generation construction professional who had spent two decades working in earthwork and underground utilities throughout the Philadelphia suburbs, founded the company with a single excavator and a crew of five out of a small office on Swedeland Road in King of Prussia.
The early years were defined by relentless hustle and a reputation for showing up — on time, fully prepared, and ready to solve problems before they became someone else's nightmare. Mayfield built its first loyal client base on small commercial pad sites and retail strip centers throughout Montgomery and Chester counties. The quality of the work spoke loudly. Repeat business followed. Word traveled through the developer community.
By the early 2000s, the company had grown into a full-service site contracting operation, taking on its first municipal infrastructure contracts for Montgomery County and several suburban townships. The addition of licensed professional engineers to the staff transformed Mayfield from a capable contractor into a genuine construction partner — one that could read a set of civil drawings, identify design conflicts, and propose solutions that saved clients time and money.
The 2008 economic crisis tested every contractor in the region. Mayfield's conservative financial management and deep municipal relationships carried the company through while competitors stumbled. Emerging stronger, Mayfield expanded its equipment fleet and headcount, positioning for the commercial development boom that would follow. By 2012, the company was regularly executing projects valued in excess of $10 million — full commercial site packages from clearing to paving.
Robert Mayfield Jr. joined the firm as Vice President of Operations in 2010, bringing a civil engineering degree from Penn State and a digital-native mindset that accelerated the company's adoption of GPS machine control, 3D grade management, and drone-based surveying technology. Projects that once required weeks of staking and layout were accomplished in days. Schedule compression became a Mayfield competitive advantage.
Today, celebrating over thirty years of uninterrupted Pennsylvania operation, Mayfield Site Contractors stands as one of the region's most trusted names in heavy civil construction. With more than 7,000 completed projects, a safety record that has earned consecutive recognition from the Pennsylvania Contractors Association, and a crew of over 150 dedicated professionals, the company that Robert Mayfield Sr. built from a single machine continues to lay the foundations on which communities grow.
Company Milestones
Projects That Define Regions
Great Valley Corporate Center
Full 22-acre site package including mass grading, stormwater management, utilities, and paving for a 4-building class A office campus.
Route 422 Interchange Upgrade
Logistics Center at Oaks
Devon Medical Campus Phase II
Main Street Streetscape Renovation
Stormwater Basin Complex
Numbers that reflect thirty years of keeping promises.
From Concept To Completion
A disciplined six-step process refined over 30 years of Pennsylvania site contracting. Every project follows this framework — no exceptions.
Consultation
We begin every engagement with an in-depth owner consultation to fully understand project goals, budget parameters, timeline constraints, and site challenges.
Consultation
We begin every engagement with an in-depth owner consultation to fully understand project goals, budget parameters, timeline constraints, and site challenges.
Site Evaluation
Our team performs a thorough site walkthrough, reviews available survey data, geotechnical reports, and utility records to identify risks and opportunities.
Engineering
Licensed engineers produce or review civil drawings, develop a detailed construction methodology, and confirm feasibility and regulatory compliance.
Construction
Our self-performing crews mobilize with owned equipment, GPS-guided machines, and a dedicated project superintendent to execute on schedule.
Inspection
Ongoing third-party testing, municipal inspections, and our internal QC protocol ensure every system installed meets specification and code.
Completion
We deliver a full closeout package including as-built drawings, warranty documentation, permits, and final inspections — handing you a complete, certified site.
What Our Clients Say
“Mayfield handled our 28-acre site in Malvern from raw land to finished grade. Their self-performance model was the differentiator — no layers of subcontractors, no finger-pointing. The superintendent ran it like a military operation. We were three weeks ahead of our GC's start date. We've used them on four projects since and won't use anyone else.”
Frequently Asked By Property Developers
Twelve of the most common questions we receive from commercial developers, property owners, and municipal clients.
Schedule A Consultation
Tell us about your project and we'll get back to you within one business day with a preliminary assessment and scheduling availability.
Let's Start Your Project
Use our consultation scheduling form above or call us directly. We respond within one business day.