What Is an Energy Efficient Mortgage?

An energy efficient mortgage (EEM) lets you finance the cost of energy-saving home improvements directly into your purchase or refinance loan — without a separate home equity loan, personal loan, or line of credit. The average U.S. household spends $2,200 per year on home energy costs, and homes with certified energy-efficient improvements reduce those costs by an estimated 20%–30% annually (U.S. Department of Energy, 2026). For a homeowner buying a $350,000 property, a Fannie Mae HomeStyle Energy mortgage can finance up to $52,500 in energy upgrades — solar panels, geothermal systems, high-efficiency HVAC, insulation, and windows — as part of the same mortgage used to purchase the home, with no second loan, no separate closing, and no additional application process.

energy efficient mortgage

Five major loan programs offer energy efficient mortgages in 2026: the FHA Energy Efficient Mortgage, the VA Energy Efficient Mortgage, Fannie Mae’s HomeStyle Energy mortgage, Freddie Mac’s GreenCHOICE Mortgage, and the USDA Rural Energy Savings Program. Each has different loan limits, credit requirements, property eligibility rules, and improvement scope — and the right program depends on your existing loan type, your property, and the specific improvements you plan to make. This guide covers all five programs in full, with verified 2026 requirements, qualification thresholds, and the step-by-step process for integrating energy upgrades into your mortgage.

What Qualifies as an Energy Efficient Improvement?

Before examining specific program requirements, it is important to understand what upgrades qualify across all EEM programs — because lenders and agencies do not finance every improvement labeled “green.”

Universally eligible improvements across all five programs:

  • Solar panel systems (photovoltaic and solar thermal)
  • Geothermal heat pump systems
  • Wind energy systems
  • High-efficiency HVAC systems (heating, ventilation, and air conditioning)
  • Insulation (attic, wall, floor, and crawlspace)
  • Energy-efficient windows and doors (double or triple-pane)
  • Water heater upgrades (tankless, heat pump, solar)
  • Air sealing and weatherization

Commonly eligible at select programs:

  • Smart thermostats and energy management systems
  • Energy-efficient appliances (ENERGY STAR certified)
  • Duct sealing and repair
  • Roof upgrades with cool-roof materials
  • Existing PACE (Property Assessed Clean Energy) loan payoff — Fannie Mae HomeStyle Energy specifically

The cost-effectiveness test: Most EEM programs require that improvements be “cost-effective” — meaning the projected energy savings over the useful life of the improvement must exceed its installation cost. A home energy assessment (typically a HERS — Home Energy Rating System — report) establishes both the projected savings and the recommended improvements, and serves as the documentation lenders need to approve the EEM add-on amount, according to ENERGY STAR and RESNET.

The Home Energy Assessment: The Gateway to Every EEM Program

With limited exceptions, every energy efficient mortgage program requires a home energy assessment completed by a certified energy rater before the additional financing is approved. The assessment does three things:

  1. Establishes the home’s current energy efficiency rating on the HERS Index (lower numbers = more efficient; a score of 100 represents standard new construction; ENERGY STAR homes score 85 or below)
  2. Identifies specific recommended improvements with cost estimates
  3. Calculates projected monthly and annual energy savings for each improvement

The assessment typically costs $300–$500 and can be included in the total EEM financing package on most programs. A certified HERS rater or DOE Home Energy Score assessor can be located through the RESNET directory at resnet.us.

The Freddie Mac GreenCHOICE exception: Improvements costing less than $6,500 do not require a formal energy assessment on GreenCHOICE mortgages — the broadest assessment waiver of any program. Fannie Mae HomeStyle Energy waives the assessment for weatherization improvements under $3,500.

Program 1: FHA Energy Efficient Mortgage

Best for: First-time buyers, borrowers with 580+ credit scores, and lower-income buyers seeking maximum financing flexibility on older homes needing significant energy improvements.

The FHA Energy Efficient Mortgage is available as an add-on to any FHA-insured purchase or refinance loan — including FHA 203(b) standard loans and FHA streamline refinances. The EEM financing rides on top of the standard FHA loan and does not require a new appraisal if the energy improvements are cost-effective per the HERS assessment (HUD, 2026).

FHA EEM loan limit calculation (the lesser of A or B):

Option A: The actual dollar cost of the energy-efficient improvements, plus the cost of the energy inspection report and any required inspections.

Option B: The lesser of:

  • 5% of the property’s appraised value, or
  • 115% of the median area price of a single-family home in that county, or
  • 150% of the conforming Freddie Mac loan limit for that area

In most markets this produces a practical FHA EEM improvement limit of $8,000–$15,000 depending on local home values — sufficient for insulation, HVAC upgrades, windows, and weatherization, but typically not sufficient for a full solar panel installation.

FHA EEM 2026 requirements:

  • Minimum credit score: 580 (for 3.5% down); 500–579 (for 10% down)
  • Down payment: 3.5% of the home’s purchase price (not including EEM improvements)
  • DTI adjustment: Monthly energy savings from improvements are added to the borrower’s qualifying income for DTI purposes — effectively expanding purchasing power
  • Eligible properties: 1-4 unit existing and new homes; individual condo units meeting FHA guidelines; cooperative units are not eligible
  • Energy inspection cost: Up to $200 of the inspection report cost may be rolled into the mortgage
  • Improvements timeline: Must be completed within 90 days of closing

For a complete overview of all FHA home loan programs available in 2026 — including standard purchase, 203(k) renovation, and streamline refinance options — RefiGuide’s FHA guide covers every program with current rates and qualification thresholds. An FHA streamline refinance paired with an EEM add-on is particularly powerful for existing FHA borrowers who want to lower both their rate and their utility bills simultaneously with a single transaction — learn more in the FHA streamline refinance guide.

Program 2: VA Energy Efficient Mortgage

Best for: Eligible veterans and active-duty service members purchasing or refinancing a primary residence who want to finance energy improvements with zero down payment.

The VA Energy Efficient Mortgage is available as an add-on to any VA-guaranteed purchase loan or VA Interest Rate Reduction Refinance Loan (IRRRL). The VA EEM is one of the simplest programs in terms of documentation — but it also carries the most restrictive loan limit of any EEM program.

VA EEM specifics (2026):

  • Maximum EEM amount: $6,000 for energy-efficient upgrades — a limit unchanged from prior years and the most restrictive cap of any major EEM program (U.S. Department of Veterans Affairs, 2026; Guild Mortgage, 2022)
  • Down payment: $0 for eligible veterans with full entitlement
  • Energy assessment required: Yes — a HERS report or equivalent energy audit must be completed
  • Improvements must be completed: Within 6 months of closing
  • Eligible improvements: Heating and cooling systems, insulation, weatherization, solar water heaters, and other cost-effective upgrades
  • Funding fee: The standard VA funding fee applies to the base loan amount; no additional funding fee on the EEM portion

The $6,000 VA EEM limitation: For veterans planning significant energy improvements — a full solar installation averaging $20,000–$35,000, for example — the VA EEM’s $6,000 cap is insufficient. Veterans in this position should consider the VA cash-out refinance to access equity for larger energy improvements, or layer a VA EEM with a separately financed solar lease or PACE loan (where available and permissible under VA guidelines).

The full scope of VA home loan benefits — including zero down payment, no PMI, competitive rates, and unlimited reuse of entitlement — makes the VA EEM the most accessible energy improvement program for eligible veterans, despite the lower dollar cap. A $6,000 investment in insulation, air sealing, and a programmable thermostat can realistically produce $600–$900 per year in energy savings — a 10–15% annual return on the improvement investment.

Program 3: Fannie Mae HomeStyle Energy Mortgage

Best for: Conventional loan borrowers seeking the highest improvement dollar limits, the broadest eligible improvement scope, and the ability to pay off existing PACE loans.

The Fannie Mae HomeStyle Energy mortgage is the most flexible and highest-limit EEM available to non-government-backed borrowers. It allows energy improvements to be financed as part of any Fannie Mae-eligible purchase or refinance mortgage — including the HomeReady low-down-payment program (Fannie Mae, 2026).

HomeStyle Energy 2026 specifications:

  • Maximum improvement amount: Up to 15% of the home’s as-completed appraised value — on a $350,000 home, this means up to $52,500 in energy improvements
  • LTV maximum: 97% (HomeReady) — one of the highest LTV options for any energy mortgage
  • PACE loan payoff: Eligible — HomeStyle Energy can pay off existing PACE loans, which is unique among EEM programs
  • Energy assessment requirement: Required for most improvements; waived for weatherization improvements under $3,500
  • Solar and renewable energy: Fully eligible — solar PV, geothermal, wind power
  • Improvement timeline: For existing homes, improvements may be completed before or after closing
  • DTI flexibility: Monthly energy savings may be applied toward the borrower’s maximum monthly mortgage payment, allowing qualification for a larger loan
  • Minimum credit score: 620 (standard); 660+ for best pricing

The PACE loan payoff feature is particularly valuable in California, Florida, and other states where PACE financing is common. Homeowners who used PACE programs for solar or efficiency improvements and are now facing high interest rates or difficult-to-subordinate liens can use HomeStyle Energy to consolidate that debt into a conventional mortgage at a lower rate with a clear lien position.

Program 4: Freddie Mac GreenCHOICE Mortgage

Best for: Borrowers with higher DTI ratios seeking flexible improvement financing without a dollar cap tied to appraised value percentage — and those making smaller improvements under $6,500 who want to skip the energy assessment.

The Freddie Mac GreenCHOICE Mortgage offers the broadest assessment waiver and the most DTI-flexible structure of any conventional EEM program (Freddie Mac, 2026).

GreenCHOICE 2026 specifications:

  • Maximum improvement amount: No strict percentage cap — improvement amounts can exceed 15% of property value in qualifying scenarios, unlike Fannie Mae’s 15% ceiling
  • Assessment waiver: Improvements under $6,500 require no formal energy report
  • LTV maximum: 97%
  • Loan term: Up to 30 years for improvement financing — matching the primary mortgage term
  • DTI adjustment: Lenders may use projected utility savings to offset increased housing expense ratios for borrowers near DTI limits
  • Eligible properties: 1-4 unit primary residences and second homes; investment properties with restrictions
  • Minimum credit score: 620 standard

The GreenCHOICE Mortgage is particularly effective for borrowers who are borderline on DTI qualification — the projected monthly energy savings can legitimately expand the qualifying payment ceiling, allowing a borrower to purchase a larger or better-located home than their unadjusted DTI would otherwise permit.

Program 5: USDA Rural Energy Savings Program

Best for: Rural homeowners in USDA-eligible areas seeking energy efficiency improvements with no down payment and the lowest rates available.

The USDA Rural Energy Savings Program (RESP) provides loans to rural electric cooperatives and other utilities, which in turn offer low-cost energy efficiency loans to rural households. While not a traditional mortgage add-on, RESP financing can be combined with USDA home loans and offers 0% or below-market interest rates on energy improvements through participating utility cooperatives (USDA Rural Development, 2026).

RESP specifications:

  • Rate: 0% to below-market depending on the participating utility
  • Geographic requirement: USDA-eligible rural areas only
  • Income limits: Apply — consistent with USDA Section 502 program thresholds
  • Eligible improvements: Full range of energy efficiency upgrades
  • Repayment: Typically structured through utility bill assessments or direct repayment to the cooperative

Side-by-Side EEM Program Comparison: 2026

Program Max Improvement Limit Min. Credit Score Down Payment Assessment Required PACE Payoff
FHA EEM ~$8,000–$15,000 (formula-based) 580 3.5% Yes No
VA EEM $6,000 None (lender min: ~580) 0% Yes (HERS) No
Fannie Mae HomeStyle Energy 15% of appraised value 620 3% (HomeReady) Yes (waived under $3,500) Yes
Freddie Mac GreenCHOICE No strict cap 620 3% Yes (waived under $6,500) No
USDA RESP Varies by utility None mandated 0% (USDA eligible) Varies No

The Financial Case for an Energy Efficient Mortgage in 2026

The financial rationale for an EEM has strengthened significantly in 2026 for three reasons:

1. Energy costs are rising. The U.S. Energy Information Administration projects residential electricity prices will rise 3%–5% per year through 2028 — meaning every year of delay on energy improvements increases the cumulative cost of inaction (EIA, 2026).

2. Improvement costs qualify for the 25C federal tax credit. The Inflation Reduction Act’s Section 25C Energy Efficient Home Improvement Credit, extended through 2032, provides a 30% federal tax credit on qualified energy improvements up to $3,200 annually — including insulation ($1,200 cap), heat pumps ($2,000 cap), and windows/doors ($600 cap) (IRS, 2026). A borrower financing $15,000 in qualifying improvements can receive up to $3,200 in direct federal tax credits in the year of installation — partially offsetting the improvement cost independent of energy savings.

3. Energy-efficient homes sell faster and for more. A 2024 Fannie Mae analysis found that homes with ENERGY STAR certification sold for an average 2.7% premium over comparable non-certified homes, and spent an average of 11 fewer days on market (Fannie Mae, 2024). On a $400,000 home, a 2.7% premium represents $10,800 in additional resale value — directly attributable to energy certification.

For buyers evaluating whether to add EEM financing to their purchase loan, the combination of monthly energy savings, federal tax credits, and resale premium frequently produces a positive net present value within 5–8 years, even at today’s mortgage rates.

For buyers exploring the full range of home improvement loan options — including home equity loans, HELOCs, and personal loans for improvements that do not qualify for EEM financing — RefiGuide’s home improvement loan guide compares all available programs with current rate ranges.

How to Apply for an Energy Efficient Mortgage: Step-by-Step

Step 1: Choose your base loan program. The EEM program you can use depends on your primary mortgage type. FHA borrowers use the FHA EEM. VA-eligible veterans use the VA EEM. Conventional borrowers choose between HomeStyle Energy and GreenCHOICE.

Step 2: Identify your energy improvements. Research the improvements you want to make — solar, HVAC, insulation, windows — and get preliminary cost estimates from licensed contractors before the energy assessment.

Step 3: Schedule a HERS energy assessment. Find a certified energy rater through RESNET.us. The assessment costs $300–$500 and produces the documentation your lender requires: the HERS score, recommended improvements, cost estimates, and projected savings.

Step 4: Provide the assessment report to your lender. The lender reviews the report, confirms cost-effectiveness, and adds the approved improvement amount to your base loan. For Fannie Mae HomeStyle Energy and Freddie Mac GreenCHOICE, improvements under $3,500/$6,500 respectively skip this step.

Step 5: Close the mortgage and fund improvements. Energy improvement funds are typically held in escrow at closing and disbursed to licensed contractors as work is completed. Most programs require improvements within 90–180 days of closing depending on program.

Step 6: Claim federal tax credits. After improvements are complete, consult your CPA to ensure you claim the Section 25C Energy Efficient Home Improvement Credit on your federal tax return for the year of installation.

FAQs About Energy Efficient Mortgages

Can You Add an Energy Efficient Mortgage to an Existing Home Loan?

Yes — all five major EEM programs are available as refinance transactions, not just purchases. An FHA borrower can add an EEM to an FHA streamline refinance; a VA borrower can add it to a VA IRRRL; a conventional borrower can refinance into a Fannie Mae HomeStyle Energy or Freddie Mac GreenCHOICE loan. The refinance simultaneously lowers the mortgage rate (if applicable) and finances the energy improvements. For existing homeowners without an eligible refinance opportunity, home improvement loan options — including home equity loans and HELOCs — provide alternative financing for energy upgrades outside the EEM framework.

Does an Energy Efficient Mortgage Require a Higher Down Payment?

No — the energy improvement portion of an EEM does not require a separate down payment. The down payment requirement applies only to the base home purchase price under the standard program guidelines: 3.5% for FHA (580+ credit score), 0% for VA (eligible veterans), and 3%–5% for conventional (HomeStyle Energy / GreenCHOICE). The EEM improvement amount rides on top of the base loan without a corresponding down payment requirement — which is one of the primary advantages of integrating improvements into the mortgage rather than financing them separately.

What Is a HERS Score and Why Does It Matter for EEM Qualification?

A HERS (Home Energy Rating System) score is a standardized numerical rating of a home’s energy efficiency produced by a certified RESNET energy rater. The scale runs from 0 (net-zero energy home) to 150+ (extremely inefficient older construction). A score of 100 represents standard new construction energy performance; ENERGY STAR certified homes score 85 or below. The HERS assessment identifies recommended improvements, their installation costs, and projected energy savings — the three data points lenders need to verify cost-effectiveness and approve the EEM add-on amount. Most EEM programs require the HERS report to be completed by a RESNET-certified rater before the improvement financing can be added to the loan.

Can Solar Panels Be Financed Through an Energy Efficient Mortgage?

Yes — solar photovoltaic systems are explicitly eligible under Fannie Mae HomeStyle Energy, Freddie Mac GreenCHOICE, and the FHA EEM programs. The VA EEM’s $6,000 cap makes it insufficient for a full solar installation, which averages $20,000–$35,000 before tax credits nationwide (Solar Energy Industries Association, 2026). For veterans wanting solar financing beyond the VA EEM limit, a VA cash-out refinance to access home equity — or a separately financed solar loan — is the more practical path. Fannie Mae HomeStyle Energy’s 15% of appraised value limit is typically sufficient for solar on most mid-range homes: on a $350,000 property, up to $52,500 is available, covering the average solar installation cost even before the 30% federal Investment Tax Credit reduces the net cost to approximately $14,000–$24,500.

Energy Efficient Mortgage Improvements Increase Your Home’s Appraised Value?

In many cases — yes, but the recognition varies by market and appraiser. Fannie Mae’s 2024 analysis found certified energy-efficient homes sell for an average 2.7% premium over non-certified comparables (Fannie Mae, 2024). The challenge is that traditional appraisal methodology uses comparable sales — and in markets where few comparable energy-efficient homes have sold recently, appraisers may struggle to quantify the value contribution. The Residential Green and Energy Efficient Addendum (Fannie Mae Form 820) was developed specifically to help appraisers document energy efficiency features in their valuation. Requesting that your appraiser complete Form 820 and providing the HERS report documentation can improve the likelihood that energy improvements are reflected in the appraised value — which directly affects the LTV calculation and maximum EEM financing available.

Can You Use an Energy Efficient Mortgage on an Investment Property?

Limited options exist. FHA EEMs are restricted to primary residences — investment properties are not eligible. VA EEMs require owner-occupancy. Fannie Mae HomeStyle Energy allows energy improvement financing on second homes, and some lenders apply it to investment properties on a case-by-case basis at lower LTV tiers. Freddie Mac GreenCHOICE permits second homes with restrictions but is generally restricted for pure investment properties. For investment property owners seeking energy improvement financing, a DSCR cash-out refinance or conventional investment property cash-out refinance — with proceeds applied to energy improvements — is typically the most accessible path.

How Do Energy Efficient Mortgages Interact With Federal Tax Credits in 2026?

The two programs stack — meaning you can receive both EEM financing advantages and federal tax credits on the same improvements. The IRS Section 25C Energy Efficient Home Improvement Credit provides a 30% tax credit on qualifying improvements up to the following annual limits: $1,200 for insulation, air sealing, windows, and doors combined; $2,000 for heat pumps; total maximum $3,200 per year (IRS, 2026). Separately, the Section 48 Investment Tax Credit covers 30% of solar PV system costs with no dollar cap for residential installations through 2032. The EEM finances the improvement cost into the mortgage at the mortgage rate; the tax credit reduces your federal tax liability in the year the improvement is installed. A borrower financing $20,000 in solar through a Fannie Mae HomeStyle Energy mortgage and claiming the 30% ITC receives a $6,000 federal tax credit — effectively reducing the net solar cost to $14,000 while spreading the repayment over the mortgage term.

Takeaways on Energy Efficient Loans

Energy efficient mortgages in 2026 are more financially compelling than at any point in the program’s history — driven by rising energy costs, extended federal tax credits through 2032, documented resale premiums for certified homes, and loan programs with limits high enough to fund meaningful improvements including full solar installations. The right program depends on your primary loan type: FHA EEM for FHA borrowers, VA EEM for eligible veterans, HomeStyle Energy for conventional borrowers seeking maximum flexibility and the highest dollar limits, and GreenCHOICE for borrowers with higher DTI ratios or smaller improvement needs below $6,500.

RefiGuide can connect you with energy efficient mortgage lenders experienced in FHA EEM, VA EEM, Fannie Mae HomeStyle Energy, and Freddie Mac GreenCHOICE programs at no cost and with no obligation.

Updated by Bryan Dornan, Mortgage Lending Expert | CA DRE: #01203791 Reviewed and Verified: May 2026 | Co-Reviewed by Peter Miller, Nationally Syndicated Real Estate Columnist

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