Since the inception of The Green Mission Inc., Probity Appraisal and recently GM-ESG, I have had the privilege of working alongside an exceptional colleague and friend, Jennie Lumpkin. From the very beginning, Jennie has been an integral part of our organization’s growth and success, shaping our approach to client service, operational excellence, and industry leadership.

My recent visit to Madrid was built around a dual focus: studying architectural salvage traditions through the city’s premier museums and buildings, and understanding how Spain is embedding deconstruction and circularity into its building sector. The combination offers a compelling case study in how a city can value its past while engineering a lower-carbon, resource-conscious future.

During my recent meetings in Chicago for both MAS LLC, my tax consultancy, and The Green Mission Inc., our sustainability and valuation firm, I was reminded why the city and the broader Upper Midwest remain national leaders in the deconstruction and reuse movement. From forward- thinking policy to grassroots innovation, this region fosters one of the most engaged and thoughtful circular economies in the country. The partnerships I have developed here over the years continue to inspire me, as do the organizations and individuals leading this work.

At The Green Mission Inc., we specialize in the valuation of architectural elements salvaged from historically significant commercial and residential properties across the United States. These include entire limestone and terracotta facades, carved friezes, monumental cornices, and ornate window surrounds—as well as interiors composed of antique hardwood millwork, decorative lighting, reclaimed wood flooring, and vintage plumbing fixtures.

The construction industry is undergoing a fundamental transformation—one driven not only by climate urgency but by market logic. According to McKinsey & Company’s recent article, “How Circularity Can Make the Built Environment More Sustainable,” the adoption of circular practices in construction could reduce up to 75 percent of embodied carbon emissions by 2050 and create as much as $360 billion in net value gains across key building materials. These gains are not speculative—they are grounded in realistic shifts in material sourcing, reuse, and system redesign.

For over two decades, advocates of “deconstruction” and material reuse have touted the environmental and economic benefits of salvaging building components. Yet the secondary market for used building materials and furnishings has remained stubbornly underdeveloped, with low demand and low value relative to new goods. Today, however, a new factor is emerging that could tip the scales: escalating U.S. tariffs on a wide range of imported goods. As trade barriers drive up the cost of new building materials, appliances, and household items, the enormous price gap between new and used goods presents a timely opportunity to finally make reuse mainstream. But seizing this moment will require overcoming long-standing supply chain challenges through unprecedented coordination between nonprofits and for-profit firms.

The choice of lumber used in residential home construction in the United States is heavily influenced by regional forest resources, climate conditions, and supply chain logistics. While most homes utilize standard dimensional lumber, the species and grades vary considerably based on location. This article outlines the most commonly used framing lumber types across major U.S. regions.