Loudoun County, Virginia · Tax exemption
Tax Exemption for Certified Solar Energy (Loudoun County)
Run by Loudoun County Commissioner of the Revenue
Loudoun County takes the value of certified solar equipment off your property's taxable value. Home systems up to 25 kW get 100% for as long as they're in service; larger home systems get 80%, then 70%, then 60%.
Amounts
How much you get
Reduces the taxable value of the real estate by a percentage of the certified equipment's value, which lowers the tax bill. The amount depends on which of these fits your install.
| What you install | You get |
|---|---|
| Up to 25 kW DC, all years in serviceResidential | 100% |
| Over 25 kW and under 5 MW, years 1-5Residential | 80% |
| Over 25 kW and under 5 MW, years 6-10Residential | 70% |
| Over 25 kW and under 5 MW, after year 10Residential | 60% |
Eligibility
Do I qualify?
You need to meet all 4 of these.
Your home is in Loudoun County, Virginia.
Owner of the Loudoun County real estate where the equipment is located.
Equipment certified by the Department of Building and Development as used primarily to collect, generate, transfer or store thermal or electric energy.
The system must be operating and have passed all required Building & Development permits before the application can be processed.
What to doFinish installation and pass final permit inspection before applying.
Equipment
What equipment counts
Applying
How to apply
You apply online. Apply any time after permits are complete; the exemption begins the following tax year.
- Install the system and pass all required permits.
- Apply by webform, or upload the PDF application through the Document Upload Portal.
Include the equipment's plans and drawings and the final invoice or contract showing total cost (parts and labor).
- Exemption starts the next tax year.
The tax year after you apply or after all permits are complete, whichever is later.
- Tell the Commissioner of the Revenue if the system stops operating.
You may be asked from time to time to prove it is still in service.
Plans and drawings
Final invoice or contract showing total cost (parts and labor)
Questions about applying703-737-8557
Stacking
Use it with
Your address
Next steps
Check that it covers your address. Then, if you want, ask for a contractor quote.
Is it available at your address?
Before anything else
Your quote request is in If a contractor we work with serves your ZIP, they can contact you. We take one request per person; contact us to change it.
Get an email if this program changes
We'll write if its amount, status or deadline changes. Nothing else.
FAQ
Questions
How much does Tax Exemption for Certified Solar Energy (Loudoun County) pay?
Up to 100% off. Reduces the taxable value of the real estate by a percentage of the certified equipment's value, which lowers the tax bill. Residential systems up to 25 kW DC: 100% of the system's value during its years in service. Residential systems over 25 kW and under 5 MW: 80% for the first five years, 70% for the next five, 60% after that.
Do renters qualify?
Owner of the Loudoun County real estate where the equipment is located.
Do I need approval before I buy?
The system must be operating and have passed all required Building & Development permits before the application can be processed. Finish installation and pass final permit inspection before applying.
What’s the deadline?
No fixed deadline. Apply any time while it’s open.
Is it still available?
Yes. It was open when we last checked, on October 20, 2026.
Plain words
Words used on this page
References
Sources
This page is built from these official pages, run by the program itself.
When one of these pages changes, we re-check this page against it.
Nearby
More in Virginia
All of Virginia
Exemption for solar facilities of 25 kW or less (Va. Code § 58.1-3661 A)
Amount varies
Statewide, a home or farm solar system of 25 kW DC or less, installed as Virginia's solar zoning law allows on residential or agricultural property, is wholly exempt from state and local taxes, including property tax on the equipment.
Checked Oct 20, 2026
Arlington County, Virginia
Arlington County Solar Exemption Tax Credit Program
Amount varies
Arlington County credits the assessed value of certified solar equipment against your real estate tax bill every year for five years, starting January 1 after approval.
Checked Oct 21, 2026
Mecklenburg Electric Cooperative and Craig-Botetourt Electric Cooperative customers, Virginia
ElecTel Energy Efficient Loan (Mecklenburg and Craig-Botetourt Electric Cooperatives)
Up to $30,000 loan
Fixed-rate loans of up to $30,000, covering up to 100% of the cost, for heat pumps, insulation, windows, doors, electric or solar water heaters and other ENERGY STAR upgrades, offered through ElecTel credit union to co-op members who own their homes.
Checked Oct 20, 2026