No Photo Available

Last Update


This profile was last updated on .

Is this you? Claim your profile.

Wrong Timothy McDonald?

Mr. Timothy E. G. McDonald

President and Chief Executive Officer

Onion Flats

Direct Phone: (215) ***-****       

Get ZoomInfo Grow

+ Get 10 Free Contacts a Month

Please agree to the terms and conditions

I agree to the Terms of Service and Privacy Policy. I understand that I will receive a subscription to ZoomInfo Grow at no charge in exchange for downloading and installing the ZoomInfo Contact Contributor utility which, among other features, involves sharing my business contacts as well as headers and signature blocks from emails that I receive.

Onion Flats

111 W. Norris St

Philadelphia, Pennsylvania 19122

United States

Company Description

Onion Flats has been practicing in Philadelphia as developers, architects and builders since 1997. Our work has been published widely and has won national and international awards, focusing on innovated solutions for highly sustainable urban communities, ... more

Find other employees at this company (19)

Background Information

Employment History

Adjunct Professor of Architecture

Temple University

Adjunct Professor of Architecture

University of Pennsylvania

Adjunct Professor of Architecture

Philadelphia University


City of Wilton

Bulk Distribution Driver Trainer

Linde AG


Advanced EMS


Board Member
Northern Liberties Neighbors Association

Founder and President Inc

Board Member
City Civic Association

Plumbob , LLC

JIG , Inc.


Bachelors of Architecture degree

Penn State University

Masters Degree

master's degree


Web References (50 Total References)

APLA Fall Lecture Series, Unfolding ... [cached]

APLA Fall Lecture Series, Unfolding Narratives, Continues January 23-3:30 pm with Timothy McDonald, Founding Principal of Onion Flats.

2016 Jury | AIANY COTE Awards [cached]

Timothy McDonald

Timothy McDonald
President, Onion Flats
Timothy McDonald, LEED AP, CHPC, is a Registered Architect in Pennsylvania and New Jersey, LEED AP, Certified Passive House Consultant and Tradesman (CPHC) and President of Onion Flats LLC, an award winning development/design/build collective centered in Philadelphia. He has been teaching and practicing for over 20 years with a focus on community development, multidisciplinary thinking and making, high-performance building technologies and alternative construction methodologies. Through his research and practice, Tim, along with his partners at Onion Flats, has developed, designed and built some of the first LEED Gold and Platinum projects in the country and the First Certified Passive House, Net-Zero-Energy-Capable project in Pennsylvania.

Onion Flats [cached]

Timothy McDonald

Timothy McDonald is the President and CEO of Onion Flats LLC. more

Onion Flats [cached]

Timothy McDonald

Timothy McDonald is the President and CEO of Onion Flats LLC. Tim is a licensed architect in Pennsylvania and New Jersey. In 1997, with his brother Patrick, he co-founded Onion Flats LLC; a Philadelphia based real estate development/design/build firm. Tim has been an adjunct Professor of Architecture at Philadelphia University,Temple University, University of Calgary, and University of Pennsylvania. His service and experience extends into his community by holding current positions in the Northern Liberties Neighbors Association Zoning Committee, the Philadelphia Sustainability Advisory Board, as well as a previous position on the Old City Civic Association Board of Directors. Tim is also Founder/President of FAARM, a non-profit organization dedicated solely to the exhibition of art and architecture in Philadelphia. As a partner in Onion Flats, Tim's role is Lead Architect and Construction Manager for many of Onion Flats' projects. In 2005, Tim and his brothers Pat and John, in conjunction with Howard Steinberg formed the architecture firm Plumbob, LLC and JIG, Inc., a General Contracting, Construction Management and Green Roof company, allowing this team to provide full design-build services for both clients and their own developments.
Additionally, Tim is a Certified LEED Accredited Professional and Passive House Certified Consultant and Tradesman.

Herring was joined in the presentation ... [cached]

Herring was joined in the presentation by Tim McDonald, a partner at OnionFlats in Philadelphia, and Ken Levenson, a Brooklyn, New York-based architect and partner at 475 High Performance Building Supply, an e-commerce supplier of energy-efficiency products.

"By 2030, 900 billion square feet of new and refurbished buildings will be constructed in cities worldwide," according to McDonald.
Belfield Townhomes in Philadelphia were designed to Passive House standards by OnionFlats.
Belfield Townhomes in Philadelphia were designed to Passive House standards by OnionFlats.
Building solutions to meet both carbon reduction goals and the demand for housing will have to be "radical, affordable, and scalable," according to McDonald, who believes that passive structures can accomplish both objectives. His firm is currently pursuing multiple residential projects in the market-rate and affordable/workforce categories, all of which meet the certification criteria for Passive House-the U.S. version of Passivhaus. One project, Belfield Townhomes, is a set of three and four-bedroom affordable-rate townhomes built for three formerly homeless families in a blighted section of Philadelphia. The buildings were built off site in a modular fashion with solar panels and their own energy recovery system.
"It elevates the standard for affordable housing in this country" and could be a scalable prototype, McDonald said.
The Pennsylvania Housing Finance Agency (PHFA) recently added Passive House certification as an incentive to developers when submitting applications to receive low-income housing tax credits. This year, 30 percent of PHFA-financed projects are expected to be built to passive standards, McDonald said.

Similar Profiles

Other People with this Name

Other people with the name McDonald

David McDonald
Lamson Airtubes LLC

Maria McDonald
McDonald HR Law

Lorna Mcdonald
Chisholm Institute

Tami McDonald
DeBellis Catherine & Morreale

Craig McDonald
Aquatic Elements Pty Ltd

City Directory Icon

Browse ZoomInfo's Business Contact Directory by City

People Directory Icon

Browse ZoomInfo's
Business People Directory

Company Directory Icon

Browse ZoomInfo's
Advanced Company Directory