Do your most inspired work

Since its days as the Lee Tire and Rubber world headquarters, the people who work here have been reinventing the wheel. Since acquiring Spring Mill in 2019, Alliance HSP has spent an excess of $15M to redevelop, rebrand, and reimagine, the Spring Mill Campus to form a creative workplace that inspires and connects those within it.


Right where you want to be

Spring Mill Campus breathes new life into the suburban workplace—offering urban walkability and creativity in the heart of Conshohocken. Plus, just a short walk from SEPTA’s Spring Mill Station and Schuylkill River Trail, the campus is accessible by car, train, or bike.

Spring Mill Main Entrance

555 E North Lane

When your main entrance is an old stone water tower you are off to a great start.

Building A

555 E North Lane

Spring Mill's main entrance and main lobby area.

Building B

1100 East Hector Street

Four stories of creative space beneath the iconic Spring Mill sign visible from I-76.

Building C

555 E North Lane

Part three-story building, part two-story building, and part one-story building: each level is unique and inspired.

Building D

555 E North Lane

Two stories of light-filled space underneath the hopper that once held the rubber that made America’s finest “puncture-proof” tires.

Building E

1010 Spring Mill Avenue

Three stories of creative space in the repurposed old boiler house.

Building F

1020 Spring Mill Avenue

Once used for warehousing tires, this building is now Conshohocken’s premier single-story office space.

The Mansion

446 East North Lane

The Mansion, also known as the Peter Legaux Mansion, is on the National Register of Historic Places. It dates back to 1735.

featured spaces

The flexibility and capacity to grow with your team.

Spring Mill is ideal for companies that want to scale their business without uprooting their staff. By reviving original design elements like exposed ductwork, polished concrete, wood beams, and black steel, tenants can enjoy Spring Mill’s historic charm while still having access to modern comforts and amenities.

Spring Mill Facts & Figures

Square feet of industrial office space
Total number of parking spaces
Alliance Redevelopment to date
Years at Spring Mill for longest tenured tenant
Smallest tenant size in square feet
Largest tenant size in square feet
Distance to train station in miles
Distance to closest craft brewery in miles

Landlord Office

40 Morris Ave, Bryn Mawr, PA

Landlord Office

Spring Mill

555 E North Lane, Conshohoken, PA

Spring Mill


Bring life to your work

With hospitality-driven service and curated programming, Spring Mill blurs the line between work and life. Here, you’ll find a full service restaurant, healthy grab-and-go food options, a fully renovated boutique fitness center, monthly events, and distinct social spaces that build community.


An Old Tire Factory, Revived.

J. Ellwood Lee opened his first factory in Conshohocken, Pennsylvania, in 1887 selling medical supplies.

Lee believed in the future of the automobile industry and decided to merge his medical supply company with Johnson & Johnson.

The Lee Tire and Rubber Company was opened in 1914 and became a staple of the industry until its decline in the 1960s.

Lee Tire and Rubber Co. began to decline in the early 1960s and was taken over by a New York firm, which changed the name to Lee National Corporation.

In 1965 the company was sold to Goodyear Tire and Rubber Company, which restored Lee’s original name. The changes delayed the company’s demise, but it went out of business in 1980.

The main building of Lee’s Tire and Rubber Co. was added to the National Register of Historic Places in 1984.

Lee’s Tire and Rubber Co. was transformed into office space, renamed Spring Mill Corporate Center, and passed between a handful of real estate investment companies.

Spring Mill was sold to boutique real estate company, Alliance HP, and reinvented to reflect the campus’s industrial history and creative future. Today, the workspace is referred to as Spring Mill Campus.


Regional Connectivity

Just 0.2 miles from Spring Mill. Septa Station and with multiple routes to major interstates, Spring Mill offers urban connectivity away from the congestion of downtown Philadelphia.

Become part of Spring Mill’s History

If you are interested in leasing office at our newly renovated creative campus, please contact the team to schedule a tour.

Spring Mill of Conshohocken
555 E. North Lane
Conshohocken, PA

Leasing Team

Patrick Brady
D. 215-771-0108

T. Ryan FitzPatrick, Esq.
D. 610-639-8980

Property Management Team: JLL

Alliance HP

Alliance HP is a boutique real estate investment and operating company focused on the Eastern United States. Alliance invests in properties that create value for our tenants, integrate into the community, and generate superior investment returns for our investors. Alliance HP is headquartered in Bryn Mawr, PA.