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Ҵýapp Ҵýapp Construction

Ҵýapp Construction has a long-standing track record of building exceptional construction projects and great relationships in Pennsylvania, Delaware, Maryland, Virginia, New Jersey, Connecticut and beyond.

Our customized services run the gamut, from preconstruction and construction project management, to Design-Build construction, and post-construction services.Our work ranges from the construction of global and regional headquarters to the expansion and modernization of occupied existing spaces, including historic structures.

An ENR Top 400 builder, our experience in various markets, including senior living, healthcare, and higher education, is sure to make your project a success.


We are passionate about everything we do, from our commitment to sustainable practices and continuous improvement to the use of virtual design technology and our promise of community involvement to support the neighborhoods where we work and live.


We are proud of the relationships we forge and we believe this is why so many of our clients return. We do more than build a building; we create a relationship based on trust and expertise.That is the Ҵýapp Way.

Our History

In 1877, a 16-year-old carpenter named Herman F. Ҵýapp left Germany and settled in Central Pennsylvania. He began to apply his craft with much success and in 1890, at age 29, he started Ҵýapp Construction Company in Lancaster.

Mr. Ҵýapp quickly earned a reputation for his efficient work ethic and attention to quality and detail. More than 130 years later, his legacy continues today in a company that has grown to serve the Mid-Atlantic and Northeast regions.

Our Vision & Values


Work smart. 
Think safe.


Do the right thing.


We do what we say.


Get better every day.


Stronger together.


Invested in people.

A relentless pursuit of excellence.

Regional Offices

Ҵýapp Construction began in 1890 as the dream of a single carpenter in Lancaster, PA. In the century-plus since, we have grown into a regional full-service construction firm with an annual volume of $400 million delivered throughout the Mid-Atlantic and Northeast. Ҵýapp operates locally with offices in PA, DE, MD, VA, NJ, and CT, providing seasoned team members with experience delivering projects for more than a dozen unique markets.  


Our quality, craftsmanship, and creativity have been honored numerous times since our humble beginnings.Ҵýapp has been frequently recognized on both the national and regional levels for excellence in construction by various trade associations, includingthe;; the former Mid-Atlantic BX; andthe(ABC),a national organization consisting of over 25,000 contractors. Since the ABC award program inception in 1990,Ҵýapp Construction has received honors regionally over 319 timeswith 173 Awards of Excellence, 116 Awards of Merit, and 13 LEED/Sustainable Green Awards. Additionally, Ҵýapp has been honored 19 times Nationally with 8 Awards of Excellence and 11 Awards of Merit.

These honors are a testament to Ҵýapp’s commitment to continuous improvement and the opportunities we offer for our team members to grow their skills and advance in their careers.