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What We Do
- Easements
- Extant Magazine
- Business Partner Directory
- Preservationist Bookstore
- Planning & Research
- - Preservation Alliance Publications
- - African American Heritage
- - Historic Religious Properties
- - Midcentury Modern Initiative
- - Nomination and Report Library
- - Preservation Plan for Philadelphia
Advocacy
- Advocacy and Legal Defense Fund
- Designations
- Philadelphia Neighborhoods
- Preservation Toolkit
- Philadelphia Resources
Events
- View All Events
- Building Philadelphia 2023 Spring Speaker Series
- The C-PACE Program: Is It Right for Your Historic Property?
- 2023 Preservation Achievement Awards – Nomination Info
- - 2022 Preservation Achievement Awards
- - 2021 Preservation Achievement Awards
- - 2020 Preservation Achievement Awards
- - Past Preservation Awards
Walking Tours
- Neighborhood Walking Tours
- Become a Tour Guide
- Self-Guided Walking Tours
- Resources for PAGP Guides
Support
- Membership Programs
- - Cornerstone Society
- - Alliance Partners
- - General Membership
- - Young Friends
- Ways To Give
About Us
- Alliance Staff
- Board of Directors
- Young Friends of the Preservation Alliance
- Financial Reports
O’Donnell & Naccarato Structural Engineers
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O’Donnell & Naccarato Structural Engineers
Business Name
O’Donnell & Naccarato Structural Engineers
Creative Structural Engineers striving to provide the most in-depth analysis to support each building's unique architectural expression and purpose.
Category
Engineering & Structural Services
Website
http://o-n.com
Phone Number
(215) 925-3788
Business Tags
Facade Restoration
,
Historic Preservation
,
Parking Restoration
,
Philadelphia Facade Inspection Ordinance
,
Structural Engineering
