The Newhouse Replacement Building on Washington State’s historic Capitol Campus represents a significant milestone in sustainable civic construction. Designed by The Miller Hull Partnership as part of the Legislative Campus Modernization (LCM) initiative, this project demonstrates how public sector buildings can achieve ambitious environmental goals while preserving architectural heritage. Building professionals looking for proven strategies in sustainable government construction will find valuable lessons in the Newhouse project’s approach to mass timber, net-zero readiness, and locally sourced materials. The project draws clear parallels to other forward-thinking developments such as the Catalyst Building in Spokane zero carbon mass timber construction, which similarly demonstrates how Washington State is leading the way in low-carbon civic architecture.
Project Background and Historical Context
From Temporary Structure to Civic Landmark
Originally constructed in 1934 as a temporary building, the original Newhouse structure became an integral part of Washington’s Capitol Campus in Olympia. What was intended as a short-term solution served the state government for nearly nine decades, housing critical administrative functions. By the time planning for replacement began, the building had far outlived its originally intended lifespan, presenting both challenges and opportunities for the design team.
The Legislative Campus Modernization (LCM) initiative provided the framework for reimagining the site. Rather than simply constructing a new office building, the state and Miller Hull recognized an opportunity to create a civic workplace that bridges past and present. The new structure honors the campus’s architectural legacy and historic significance while setting a new standard for sustainable public building design.
Design Philosophy: Where Past Meets Present
The design approach for the Newhouse Replacement Building centers on three interconnected priorities:
- Historical continuity: Respecting the Capitol Campus architectural language while introducing contemporary sustainable systems
- Ecological stewardship: Minimizing the building’s environmental footprint through material selection and energy performance
- Functional efficiency: Creating a workplace that serves the needs of state government employees for decades to come
This tripartite philosophy informed every decision from site planning through material procurement, ensuring that sustainability was not an add-on but a foundational principle.
Mass Timber Strategy and Structural Innovation
Locally Sourced Douglas Fir as a Low-Carbon Solution
At the heart of the Newhouse project is its commitment to mass timber, specifically locally sourced Douglas Fir. Washington State is one of the nation’s premier sources of this valuable softwood species, and the project team made a deliberate choice to leverage this regional resource. The use of mass timber serves multiple sustainability goals simultaneously:
- Carbon sequestration: Wood stores carbon dioxide removed from the atmosphere during the tree’s growth, keeping it locked in the building structure for the life of the building
- Reduced embodied carbon: Manufacturing mass timber requires significantly less energy than steel or concrete production
- Regional economic support: Sourcing from Washington mills directs state funds toward local economies
- Renewable resource: Douglas Fir is harvested from sustainably managed forests with replanting programs
The project’s use of mass timber aligns with broader trends in Washington State, where building codes have been updated to accommodate taller wood structures. The Washington State mass timber building codes set a precedent that made innovative projects like Newhouse feasible within the regulatory framework.
Steel and ADLT Floor Deck Assembly
One of the most technically notable features of the Newhouse project is its hybrid structural approach. Steel columns and beams form the primary framing system, while the floor decks use Acoustic Dowel Laminated Timber (ADLT). This composite system combines the strength and span capabilities of steel with the sustainability and aesthetic warmth of timber.
The ADLT system works through an innovative assembly process:
- Solid wood members are precisely doweled together to create structural floor panels
- Precision-milled grooves are cut into the wood members during fabrication
- Acoustical insulation is inserted into these grooves to enhance sound absorption between floors
- The completed panels are installed atop the steel framing system
The Newhouse Replacement Building establishes itself as the first known building to feature an ADLT assembly that eliminates all known chemicals of concern. This represents a meaningful advancement in healthy building materials, demonstrating that high-performance acoustic separation can be achieved without relying on chemical additives that may pose health risks during manufacturing, installation, or occupancy.
Energy Performance and Net-Zero Readiness
LEED Platinum Certification
The Newhouse Replacement Building achieved LEED Platinum certification, the highest rating offered by the U.S. Green Building Council. This places the project among the top tier of sustainable buildings nationally and demonstrates that civic construction can meet the same rigorous standards as private sector green building projects. The certification process required the design team to integrate sustainability across all aspects of the building, from site development to indoor environmental quality.
For context on the highest benchmarks in this category, the LEED Platinum integrated campus at Loyola University Seville demonstrates how similar certification standards have been achieved internationally in institutional settings.
On-Site Renewable Energy Generation
A roof-mounted photovoltaic (PV) array forms the cornerstone of the building’s on-site energy strategy. The solar installation accounts for approximately 20 percent of the building’s total energy demand, significantly reducing reliance on grid-supplied electricity. While the building is classified as net-zero ready rather than fully net-zero at this stage, the PV infrastructure positions the project to achieve full net-zero status as grid decarbonization progresses or additional renewable capacity is added.
Natural Ventilation and Passive Strategies
Every office in the Newhouse Replacement Building features operable windows, a design choice that enhances energy efficiency while improving occupant comfort and well-being. Natural ventilation reduces the mechanical cooling load during moderate weather months, cutting both energy consumption and operational costs. This passive strategy is complemented by:
- Green roof system: Located on the fourth floor, the vegetated roof reduces stormwater runoff, provides insulation, mitigates the urban heat island effect, and offers aesthetic and recreational value for building occupants
- Daylighting optimization: Building orientation and window placement maximize natural light penetration, reducing artificial lighting requirements
- High-performance envelope: Continuously insulated building enclosure minimizes thermal bridging and uncontrolled air leakage
Local Material Sourcing and Economic Impact
Washington-First Procurement Strategy
The Newhouse design team implemented a deliberate Washington-first procurement strategy. The goal was to ensure that state funds invested in the project benefited Washington’s economy and supported its environmental priorities simultaneously. This approach resulted in nearly all building materials, from exterior cladding to interior finishes, being sourced within the state.
This local emphasis creates a cascade of benefits beyond transportation emissions reduction:
- Supports local manufacturing jobs and skilled trades
- Reduces transportation-related carbon emissions
- Ensures materials are suited to the regional climate conditions
- Creates a replicable model for other state-funded construction projects
Douglas Fir: Washington’s Indigenous Resource
Douglas Fir holds a special place in Washington’s natural and economic history. As one of the state’s most valuable renewable resources, it has been central to the region’s forestry and building industries for generations. By making mass timber central to the building’s low-carbon strategy, the Newhouse project elevates this traditional material into a modern high-performance application. The exposed timber interiors also contribute to biophilic design principles, connecting occupants to the natural environment and improving overall workplace satisfaction.
The thoughtful integration of wood as both a structural and aesthetic material in civic buildings has parallels in other projects across the region. The timber office building design strategies employed in contemporary workplace architecture demonstrate how mass timber can be applied across building typologies for both performance and occupant well-being.
Quantified Local Sourcing Impact
| Material Category | Sourcing Strategy | Environmental Benefit | Economic Impact |
|---|---|---|---|
| Mass Timber (Douglas Fir) | Washington state mills | Carbon sequestration, low embodied carbon | Supports regional forestry and manufacturing |
| Exterior Cladding | In-state suppliers | Reduced transport emissions | Directs funds to local contractors |
| Interior Finishes | Washington vendors | Lower supply chain carbon footprint | Strengthens local material supply chains |
| HVAC and MEP Systems | Regional distributors | Familiarity with local climate conditions | Supports Washington-based trades |
This systematic approach to local procurement demonstrates that large public building projects can achieve economic and environmental goals simultaneously. For building professionals involved in specifying materials for government projects, the Newhouse model offers a clear template for integrating sustainability criteria into procurement decisions without sacrificing performance or budget.
Lessons for Building Professionals
Key Takeaways for Sustainable Civic Construction
The Newhouse Replacement Building offers several actionable lessons for architects, engineers, specifiers, and construction managers working on civic and institutional projects:
- Start with local resources. The Washington-first procurement model worked because the team committed to it early in design development. Specifying local materials requires advance coordination with regional suppliers and may affect construction sequencing, but the combined environmental and economic dividends justify the effort.
- Embrace hybrid structural systems. The steel-plus-ADLT approach demonstrates that mass timber does not need to be an all-or-nothing choice. Hybrid systems can optimize structural performance while maximizing the sustainability benefits of wood.
- Design for net-zero readiness. Even where full net-zero energy performance is not immediately achievable, designing the building shell, roof structure, and electrical systems to accommodate future PV expansion is a cost-effective strategy that preserves long-term options.
- Prioritize chemical transparency. The elimination of chemicals of concern in the ADLT assembly sets a new benchmark. Specifiers should request health product declarations and pursue material transparency as a standard practice.
- Integrate passive strategies from the start. Operable windows, green roofs, and daylighting are most effective when integrated into the building massing and orientation decisions made during schematic design.
The Future of Civic Building Construction
The Newhouse Replacement Building is not an isolated achievement but part of a broader movement toward sustainable public infrastructure. As state and local governments increasingly adopt climate action plans with specific targets for building performance, projects like Newhouse provide tested models for meeting those goals. The combination of mass timber construction, on-site renewable energy, rigorous local sourcing, and chemical transparency represents a replicable framework that can be adapted to civic projects of varying scales and budgets.
For building professionals, the message is clear: sustainable civic construction is not only feasible but increasingly expected. The Newhouse project proves that with deliberate planning, cross-disciplinary collaboration, and a commitment to local resources, public buildings can achieve the same level of environmental performance as the most ambitious private sector projects, while also strengthening regional economies and preserving architectural heritage.