WAP Budget Structure
WAP budgets are structured around a per-unit cost model with separate allocations for training, administration, and health and safety. Understanding how these categories interact — and which costs count toward the per-unit average versus which are excluded — is essential for accurate budget planning and compliance. Getting this wrong is one of the most common issues identified during monitoring visits.
Average Cost per Unit
DOE establishes a maximum average cost per dwelling unit that limits how much can be spent on the actual weatherization work for each home. The key word is "average" — individual units may cost more or less than the limit, but the overall average across all completed units must not exceed the cap.
| Funding Source | Per-Unit Limit | Notes |
|---|---|---|
| Regular WAP appropriation | $8,009 | Adjusted periodically by DOE; this is the FY2024 limit |
| BIL-funded jobs | $12,000 | Higher limit reflects increased material/labor costs and expanded scope |
What Counts Toward the Average
Understanding which costs are included in the per-unit average calculation is critical. The average includes:
- Included: Labor costs for installation crews (including Davis-Bacon wages and fringe), materials and supplies, contractor costs for measure installation, energy audit costs, and quality control inspection costs
- Excluded: Training and technical assistance (T&TA) costs, administrative costs, and health and safety expenditures. These categories have their own separate allocations and are not counted in the per-unit average.
This distinction matters because an agency whose all-in cost (including H&S and admin) averages $10,000 per unit may still be compliant if the program operations portion (excluding H&S and admin) averages below $8,009.
Training and Technical Assistance (T&TA)
DOE allows states to allocate up to 20% of their WAP allocation for training and technical assistance under the regular appropriation. BIL provides additional T&TA funding beyond this percentage. T&TA funds support:
- Staff training: BPI certification courses, NEAT/MHEA auditor training, SWS installation training, lead-safe work practices, and Davis-Bacon compliance training
- Conference and workshop attendance: National and state weatherization conferences, DOE-sponsored technical training events
- Certification and testing fees: BPI exam fees, certification renewal costs, and continuing education
- Technical assistance to sub-grantees: State- provided field mentoring, audit review, and program development support
Administrative Costs
WAP administrative costs cover program management functions that are not directly related to weatherizing individual homes. DOE typically allows up to 5% to 10% for state administration, with sub-grantee administrative percentages set by the state. Administrative costs include:
- Executive and management staff time on program oversight
- Accounting, payroll, and human resources functions
- Office rent, utilities, and supplies not allocable to production
- IT systems, data management, and reporting infrastructure
- Insurance, legal, and audit costs
As with all federal awards, administrative costs must comply with 2 CFR 200 cost principles — they must be necessary, reasonable, allocable, and adequately documented.
Health and Safety Spending
Health and safety (H&S) expenditures have their own separate allocation within the WAP budget. These costs cover activities needed to protect occupant health and worker safety during and after weatherization, but that do not directly produce energy savings. Typical H&S spending is 15% to 20% of program operations, though the exact percentage varies by state and is defined in the state's health and safety plan.
Allowable Health and Safety Expenditures
| Category | Examples | Cost Consideration |
|---|---|---|
| Combustion safety | CO detectors, smoke alarms, combustion appliance testing and repair | Required on every job; relatively low cost per unit |
| Lead-safe work | Containment, HEPA vacuuming, clearance testing, disposal | Can add $500–$2,000+ per job in pre-1978 homes |
| Ventilation | Bath fans, range hoods, mechanical ventilation where needed post-air-sealing | Increasingly common as air sealing reduces natural ventilation |
| Minor electrical | Junction box covers, GFCI outlets, knob-and-tube isolation | Limited to what is needed to safely perform weatherization |
| Moisture management | Vapor barriers, drainage improvements, minor plumbing repairs | Addressed when moisture issues would be worsened by weatherization |
Materials vs. Labor Breakdown
A typical WAP job's cost splits roughly as follows, though the exact proportions vary by region, dwelling type, and local labor rates:
- Labor (40%–55%): Crew wages and fringe benefits, including Davis-Bacon prevailing wage rates. Labor is typically the largest single cost component.
- Materials (30%–40%): Insulation, caulk, weather stripping, duct mastic, furnace components, water heater parts, CO detectors, smoke alarms, and other installation materials.
- Contractors (10%–25%): HVAC contractors for furnace replacement, electrical work, and specialized tasks that in-house crews cannot perform.
- Vehicle and equipment (5%–10%): Fuel, vehicle maintenance, blower door calibration, insulation blower rental or depreciation, and diagnostic tool maintenance.
Davis-Bacon Wage Calculations
Davis-Bacon compliance has a direct impact on WAP budgets because prevailing wage rates often exceed the standard wages agencies would otherwise pay. Accurate budgeting requires understanding the wage determination structure:
- Basic hourly rate: The minimum hourly wage for each job classification (e.g., insulator, carpenter, laborer) in the county where work is performed. Rates vary significantly by county and classification.
- Fringe benefit rate: The required fringe benefit amount, which may be paid in cash (added to the hourly rate) or through bona fide benefit plans (health insurance, retirement, etc.).
- Total prevailing wage: The sum of the basic hourly rate plus fringe. This total represents the minimum compensation that must be provided to the worker for each hour of covered work.
For agencies serving multiple counties, Davis-Bacon rates may differ by job location. Budget accordingly by estimating the weighted average rate based on your anticipated production distribution across counties. For detailed guidance on Davis-Bacon compliance procedures, see the compliance section.
Leveraging Other Funding
Effective weatherization agencies supplement WAP funds with other resources to maximize the number of homes served and the comprehensiveness of each job. Common leveraging strategies include:
- LIHEAP transfers: States may transfer up to 15% of their LIHEAP allocation to WAP. This is the single largest source of leveraged WAP funding nationally and can increase a state's weatherization budget by 30% to 50%.
- Utility-funded programs: Many utilities operate energy efficiency programs that can fund measures not covered by WAP (window replacement, appliance upgrades) or supplement WAP work on the same home.
- State appropriations: Some states appropriate additional state general fund or energy-related revenue to weatherization, often with different eligibility criteria or spending limits.
- Private contributions: Partnerships with materials suppliers, contractors willing to provide discounted services, and community organizations that contribute labor or funds.
When blending funding sources on a single job, maintain clear cost allocation documentation showing which fund paid for each component. Monitoring visits will verify that no funding source was charged for costs that should have been allocated to another program.
BIL Cost Category Changes
The Bipartisan Infrastructure Law made several changes to WAP's cost structure that affect budget planning:
- Higher per-unit limit ($12,000): Allows more comprehensive treatments per home, accommodating rising material and labor costs and enabling deeper energy retrofits.
- Enhanced T&TA funding: Additional training resources to support workforce expansion, including new crew training, certification programs, and apprenticeship development.
- Separate fund tracking: BIL funds must be tracked separately from regular WAP appropriation funds. This means separate production counts, separate per-unit averages, and separate financial reporting.
- Capacity-building investments: BIL funds may be used for one-time capacity investments (vehicles, equipment, facility upgrades) that support the production scale-up.
Budget Management Best Practices
Sound budget management in WAP requires balancing production goals against cost constraints while maintaining compliance with multiple funding source requirements. These practices help:
- Track per-unit averages monthly: Do not wait until the end of the year to discover your average cost is too high. Monthly tracking allows you to adjust — by completing simpler units to bring the average down or by using leveraged funds for expensive jobs.
- Maintain a cost allocation plan: When blending WAP with LIHEAP, utility, and state funds, a written cost allocation plan documents which fund covers which cost on each job. This is your primary defense during monitoring.
- Budget for Davis-Bacon from the start: Prevailing wage requirements are not optional. Build Davis-Bacon wage rates into your initial budget, not as an afterthought. Under-budgeting for labor is a common cause of production shortfalls.
- Monitor expenditure rates against production: If you are spending faster than you are completing units, your per-unit average is trending too high. If you are completing units but expenditure is lagging, you may have unreported costs or data entry delays.
- Plan for seasonal variation: Production typically peaks in spring and fall. Budget your cash flow accordingly, and communicate with your state if expenditure patterns differ from a linear projection.
For guidance on financial reporting requirements related to your WAP budget, see the reporting section. For common budget-related compliance pitfalls, see common mistakes. For Single Audit requirements that apply to organizations expending $750,000+ in federal awards, see our compliance hub.