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This profile was last updated on 11/19/15  and contains information from public web pages and contributions from the ZoomInfo community.


Phone: (215) ***-****  
Local Address:  Philadelphia , Pennsylvania , United States
Onion Flats
111 W. Norris St.
Phila , Pennsylvania 19122
United States


Employment History

Board Memberships and Affiliations


  • Masters Degree
  • Bachelors of Architecture degree
    Penn State University
103 Total References
Web References
Tim McDonald of Onion Flats ..., 21 Nov 2012 [cached]
Tim McDonald of Onion Flats and its affiliated building and manufacturing firms in Philadelphia presented the ambitious and affordable modular approaches his firm is utilizing in a variety of passive house projects for both low-income and market rate housing. "What struck me about the event," he observed, "was that we're no longer talking about Passive House as a 'new', 'European', 'expensive' and 'boutique' approach to designing and thinking about buildings in the US. It's on the verge of being 'mainstream'! Noting that passive house principles are "common sense," he cited Ben Franklin's dictum "The trouble with common sense is that it's not all that common," acknowledging that "we still have much work to do."
Timothy McDonald, RA, CPHC, is the President and CEO of Onion Flats LLC, a Philadelphia based real estate development/design/build firm. Tim is a licensed architect in Pennsylvania and New Jersey. He has served a variety of architectural, civic and educational institutions. Tim's role is Lead Architect and Construction Manager for many of Onion Flats' projects. In 2005, Tim and his partners have formed a family of related firms including Plumbob, LLC and JIG, Inc., allowing this team to provide full design-build services for both clients and their own developments.
NLNA » Get Involved, 2 May 2014 [cached]
Tim McDonald
Tim ..., 1 April 2009 [cached]
Tim McDonald
project designer: Tim McDonald, PLUMBOB LLC
photography: Tim McDonald, except where noted.
product specs bathroom fittings: Caroma USA, Liz Kinder Ceramics; bathroom fixtures: Grohe America, Kohler Co., MTI Whirlpools; bathroom cabinets: Christopher Kircher Design by Process; ceiling fans: The Modern Fan Co.; countertops: DuPont (Corian), Lamacraft; dishwasher: Fagor America; doors, windows: JELD-WEN; exterior siding: James Hardie Building Products, Trespa North America; flooring (ceramic tile/stone/concrete): Glassar S.R.L. (Trilogika), LAUFEN USA; flooring (wood): EcoTimber; garbage disposer: In-Sink-Erator; hardware: Omnia Industries; hvac equipment: LAARS Heating Systems Co.; kitchen cabinets: MODULNOVA s.r.l.; kitchen fittings: Elkay USA; kitchen fixtures: Grohe America; lighting control: Colorado vNet; lighting fixtures: EGLO USA, Forecast, LBL Lighting; oven/range: Jenn-Air; paints/stains/wall finishes: Duron Paints & Wallcoverings; refrigerator: The Liebherr Group; roofing: CertainTeed Corp.; skylight/roof windows: Wasco Products; solar energy system: Chromagen, Hickory Ridge Construction Services; ventilation system: Fantech
The third standout of the Passive ..., 17 Aug 2015 [cached]
The third standout of the Passive House case studies is of two projects in Philadelphia, Pennsylvania by Timothy McDonald of Onion Flats.
"It's full of triple-paned windows that ..., 23 July 2015 [cached]
"It's full of triple-paned windows that are like freezer doors," says Tim McDonald, president of Philadelphia-based development company Onion Flats LLC and an associate professor of practice at Temple University. Builders also remove "thermal bridges," which conduct heat into or out of a home. These features can add up to 10 percent to the cost of construction, says McDonald.
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