The landscape of construction specifications is set to shift dramatically as embodied carbon requirements transition from policy discussions to enforceable standards. By 2027, specifications for new construction projects will be required to document, verify, and enforce embodied carbon thresholds, moving carbon accountability from optional best practice to a regulated, auditable project requirement. This marks a new phase for the built environment, demanding a clear framework for how materials are selected, quantified, reported, and approved—all driven by local, state, and federal mandates, and shaped by tools able to coordinate complex data at scale.

For architects, specifiers, contractors, manufacturers, and owners, this is a defining moment: construction documents will evolve beyond describing performance and durability to include strict carbon disclosure, mandatory Environmental Product Declarations (EPDs), whole building life cycle assessments (WBLCA), and clear procedures for meeting global warming potential (GWP) limits. The clarity and enforceability of these requirements hinge on precision in construction specifications and robust data management across every material and project phase.

Definition: Embodied Carbon and Its Role in Specifications

Embodied carbon is the total greenhouse gas emissions generated by building materials throughout their lifecycle—from extraction, manufacturing, transport, and installation through to end-of-life. As governments adopt policies to reduce the built environment’s climate impact, embodied carbon is moving to the forefront of project sustainability requirements. Specifications will have to capture, verify, and enforce carbon-related data for every major project, with EPDs and WBLCA set to become mandatory submittals in many regions.

Step-by-Step: How Embodied Carbon Requirements Will Change Specifications in 2027

1. EPDs Move from Optional to Required

By 2027, most specifications will require EPDs for high-impact materials such as concrete, steel, wood, and asphalt. Previously, EPDs were supplemental and often left to contractor discretion. Now, specifications will:

• Clearly identify products needing product-specific EPDs
• Define when industry-wide or regional EPDs are allowed
• Assign responsibility for collecting, submitting, and reviewing EPDs
• Specify protocols when compliant EPDs are unavailable

2. Quantity Reporting Becomes Compliance-Driven

Specifications will no longer treat take-offs and quantity tracking as back-office estimating. Carbon compliance requires accurate material quantity reporting aligned with project as-built conditions. Specifiers are now expected to:

• Require bill of materials data be verified and submitted with EPDs
• Coordinate documents and schedules to ensure final quantities match carbon calculations
• Mandate reconciliation of actual vs. estimated material usage at project closeout

3. Whole-Building Life Cycle Assessment (WBLCA) as a Standard

Public clients and state agencies are embedding WBLCA into their standards. Specifications will have to:

• State which baseline method and software must be used
• Define submittal deadlines for WBLCA results
• Outline re-analysis procedures post-major design revisions

4. Carbon Limits Set as Product Selection Criteria

State and local policies are preparing to set embodied carbon budgets, moving beyond disclosure. Specs will require contractors and suppliers to prove that their materials meet GWP thresholds, with clear substitution review for alternates. This will influence:

• Selection and procurement of products based not just on performance but also verified carbon intensity
• Written processes for substitution requests impacting embodied carbon
• Mandatory documentation hierarchy to handle noncompliant products

Key Material Categories Most Impacted

The greatest immediate shift will occur in ready-mix concrete, precast concrete, structural steel, steel reinforcement, structural wood, asphalt, and window assemblies. Draft policies and industry guidance repeatedly identify these as priorities due to their high embodied carbon and standardized EPD infrastructure. Future specs will include:

• Section-specific EPD submission and approval requirements
• Maximum GWP for each material or assembly
• Review protocols for substitutions exceeding carbon thresholds

Framework: What a 2027 Specification Will Include

• Division 01: Administrative requirements for sustainability, EPDs, WBLCA, and closeout
• Product sections: Accepted materials, required documentation, GWP limits, protocols for alternates
• Procurement language: Submittal timing, mandatory verification steps, consequence of noncompliance
• Quality control: Methods for verifying quantities and reviewing data integrity
• Recordkeeping: Closeout documentation tying installed products to EPD/GWP submission

Why These Changes Matter—Risks and Opportunities

The risk of not adapting is both practical and strategic. Projects without robust carbon documentation risk noncompliance, change-orders, and delays during procurement and closeout. However, teams that adapt early will gain:

• More effective bid packages with fewer disputes
• Faster compliance review and approvals
• Market advantage as sustainability becomes a primary selection factor for public and private clients

For a practical perspective on the data foundations and workflows needed to avoid costly mistakes, see our discussion on why clean project data is essential for AI, compliance, and sustainability.

Real-World Preparation: What Owners and Project Teams Should Do Now

Owners and project leads should begin integrating carbon-related requirements into specifications for projects breaking ground after 2027. Key steps include:

• Mandate product-specific EPDs where possible
• Permit regional/industry EPDs only if compliant with jurisdictional rule
• Assign data management responsibility for material quantities
• Include early-stage carbon review before construction documents or GMP
• Require final carbon reporting at project closeout

This proactive approach is necessary, especially for public projects and projects likely to be covered under new state/federal standards.

Implementation Considerations for Contractors, Manufacturers, and Suppliers

For Contractors

• Develop a practice-ready EPD library organized by product category
• Integrate carbon data collection into early procurement rather than after award
• Institute review workflows for substitutions impacting embodied carbon
• Establish robust communication with suppliers to guarantee complete documentation
• Keep a detailed change log connecting procurement, installation, and final reporting

For Manufacturers and Suppliers

• Maintain product-specific, updated EPDs—and reduce EPD preparation time
• Coordinate technical, sales, and sustainability teams on a unified compliance response
• Be prepared for customer requests for project-specific carbon documentation tied to facility, mix, or product family
• Provide guidance and technical support to specifiers and contractors navigating new carbon rules

How Hubexo Equips the Industry for This Transition

Hubexo is positioned at the intersection of construction intelligence, sustainability, and digital specification. Our tools deliver the project visibility, product intelligence, and procurement integration necessary to navigate embodied carbon requirements.

• ConstructionWire: Track project leads and market trends at scale, ensuring early awareness of projects with new carbon rules.
• Product Intelligence: Access verified data on facility products, including supplier and specification insights, to ensure products meet evolving EPD and carbon requirements.
• NAPC: Streamline procurement and product selection with advanced search, custom alerts, and documentation management tied to specification compliance.
• Pantera: Connect project management, submittals, and field-office workflows for seamless, compliant project execution.

With deep data roots and a commitment to sustainability, Hubexo offers expertise and integrated digital solutions for industry leaders facing the embodied carbon transition. Learn more about our story and upcoming resources here.

Best Practices for Embodied Carbon Specifications

• Collaborate early between architects, contractors, and suppliers to define clear carbon data workflows
• Use specification templates that require product-specific EPDs and GWP documentation
• Coordinate bill-of-materials authentication with procurement and field teams
• Schedule interim WBLCA reviews at design and post-bid
• Maintain up-to-date submittal libraries to reduce risk of documentation delays

Frequently Asked Questions

What triggers embodied carbon requirements in specifications?

New regulatory frameworks often trigger embodied carbon requirements based on project type, size, public funding, or material category. Specifications are required to include EPDs, GWP thresholds, and WBLCA once a project is covered by jurisdictional policy.

Who is responsible for verifying carbon compliance?

Typically, the specification will delegate data collection to the contractor and documentation review to project administrators, while product data is provided by manufacturers and suppliers. Third-party verification may be required for WBLCA or carbon budgets depending on project scope and funding source.

How should substitutions be handled when a product lacks compliant carbon data?

Specifications should include protocols that require documentation review and approval before any substitution, prioritizing compliance with established carbon thresholds and disclosure requirements.

What happens if project documents are missing required EPDs or carbon reports?

Without complete documentation, projects may face compliance penalties, slowed procurement, delayed approvals, and additional costs to replace nonconforming materials. Proactive coordination and documentation management are the best defenses.

How can digital tools help meet new specification requirements?

Digital platforms like those from Hubexo centralize project information, product intelligence, and procurement workflows, making embodied carbon compliance more efficient and transparent.

Is there guidance for integrating carbon requirements into existing project workflows?

Many businesses find that early adoption of updated specification templates and centralized digital documentation gives project teams a significant head start ahead of new regulations.

Conclusion: Future-Proofing Project Specifications

By 2027, construction teams will need to reimagine specifications as tools for both quality and carbon compliance. The shift to embodied carbon reporting and reduction is more than a policy change—it touches every aspect of specification writing, procurement, submittal review, and final documentation.

Teams who prepare by integrating carbon data requirements today will unlock smoother project delivery, fewer delays, and market advantages as sustainable practices become the norm. To learn how Hubexo can help you lead this transition with project intelligence and integrated digital workflows, explore our full suite of solutions or contact our team directly.