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This profile was last updated on 6/23/14  and contains information from public web pages and contributions from the ZoomInfo community.


Local Address: Philadelphia, Pennsylvania, United States
Onion Flats
111 West Norris St.
Phila, Pennsylvania 19122
United States


Employment History

Board Memberships and Affiliations


  • Masters Degree
  • Bachelors of Architecture degree
    Penn State University
92 Total References
Web References
Tim McDonald, head of ..., 23 June 2014 [cached]
Tim McDonald, head of Onion Flats, a green architecture and construction firm in Philadelphia, said he's been waiting a long time for what he calls "responsible" legislation like this.
"Bills that both create jobs for this Commonwealth, as well as create an environment in Pennsylvania which makes it what Philadelphia is trying to be - the greenest city and state in the country," he said.
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
Intus Windows Blog - Passive House Windows | Triple glazed windows | Intus windows - Passive House Windows | Triple glazed windows | Intus windows, 8 April 2013 [cached]
"We like to think this way because most developers don't," said Timothy McDonald, a principal at Onion Flats, "for us, it's not something new."
"Sustainability is what we are working on and well known for," said Timothy McDonald, "it's time to take it to the next level."
House energy monitoring system installation in every house will help homeowners to be a part of the ongoing process and follow energy consumption in their home. Super insulated exterior envelopes will significantly reduce the need for heating and cooling and thus decrease the overall operating costs. Combining all those factors together the project will reach its goal and reduce its environmental impact almost to zero."The houses are going to be completely energy sufficient by themselves, occupants will be responsible for energy use-what's called net-zero energy possible," said Tim McDonald.
Completion nears for the first 3 homes in the 27 unit Stables townhomes project. The primary project was significantly downsized from 70 to 27 units from the original plans - "the money issue for larger residential projects still remains relevant," said Tim McDonald. "It's been taking us to go to many different banks and every time to come up with something that would make it work, but it won't stop us" he said. According to Tim McDonald the first unit should be completed by May.
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