Solar Panel Installation in Longmont, CO
Local sun, utility rules, permits and installers
Longmont has about 1,340 kWh a year per kW of rooftop solar (our estimate). Your utility decides what exported power earns, so see the rules for Longmont Power & Communications and United Power, below, then get quotes.
Longmont solar at a glance
Utility rules and programs for Longmont
Longmont Power & Communications and United Power, serve Boulder County, so which rules apply depends on your address.
| Utility | Type | Solar export rule |
|---|---|---|
| City of Longmont | city-owned | Not confirmed: the Longmont Power & Communications pages we read did not state its net-metering credit. Call LPC at 303-651-8386 for the written rule. |
| United Power, Inc | member-owned cooperative | Not confirmed: United Power’s website blocked our reader, so we could not read its net-metering credit. State law lets co-ops net meter small home systems; ask United Power for its written rule and any yearly payout rate. |
Program details are from each utility’s own pages (read October 2026). See the Colorado incentives table for statewide credits and a status for every program.
Permits and approvals in Longmont
- City of Longmont Building and Inspection Services: permit information
- Inside city limits, apply for the solar building permit through the city’s online portal and send the interconnection checklist to Building Services. A licensed solar installer is required; outside city limits, Boulder County issues the building permit.
- The utility must approve the connection before you switch on: Longmont Power & Communications · your own utility’s interconnection page.
- Check any contractor on the Colorado State Electrical Board (license verification) before you sign.
- Colorado law (C.R.S. 38-30-168) voids rules that effectively prohibit solar, but allows reasonable size, placement and look rules that do not raise cost or cut performance by more than 10% or delay review beyond 60 days.
Fees and steps change; confirm with the office before you start. We have not verified timelines for Longmont.
Costs and savings
We do not have verified installed prices for Longmont alone. The Colorado figures above show what to expect; real quotes depend on your home, equipment and installer. Try the solar savings calculator, and get at least two written quotes.
Choosing an installer
- License: check the contractor on the Colorado State Electrical Board (license verification) and that the license covers this work.
- Quote: ask for an itemized written quote that names the equipment, warranties and who pulls the permit and handles the utility approval.
- Compare: get two or three quotes and compare them line by line, not only the total.
Get solar quotes in Longmont
Tell us about your project in Longmont. We reply ourselves and match you with a licensed installer who serves your area. It is free, with no obligation, and nothing is shared with an installer unless you choose one.
More for Longmont
Home Battery Installation in Longmont · Backup Generator Installation in Longmont · Home EV Charger Installation in Longmont · Longmont energy guide · Colorado energy guide.
Solar Panel Installation in Longmont FAQs
Is solar worth it in Longmont?
The sun is strong (about 1,340 kWh a year per kW, our estimate), but export credits are low, so solar pays most when sized to what you use at home or paired with a battery. See the Colorado incentives for the state credit.
Is there a federal solar tax credit in 2026?
No. The federal 25D credit ended for expenditures after December 31, 2025. Colorado has no state solar income tax credit that we could confirm; its state benefits are the residential property-tax exemption and sales and use tax exemptions for solar components and home batteries.
Do I need a permit for solar panels in Longmont?
Usually yes, and the utility may need to approve solar and batteries. City of Longmont Building and Inspection Services handles permits in Longmont; see the permit information above.
How do I find a licensed installer in Longmont?
Use the quote button on this page. We reply ourselves and match you with a licensed installer who serves your area; you can check any contractor on the Colorado State Electrical Board (license verification).
Sources: sunshine and climate NASA POWER; hazards FEMA National Risk Index; utility numbers EIA-861 (2024); prices EnergySage (October 2026) and Generac (U.S.); credits IRS and the Colorado Division of Property Taxation; permit information from the city or town’s own page; utility programs from each utility’s own pages (October 2026). General information, not financial, tax, legal or electrical advice. See our editorial policy.
Where to buy
Amazon shows many brands. Use the checklist to compare them.
What to check before you buy:
- Rated watts and connector type match your power station
- Folding panels: weight and weather rating are listed
- Reviews from people using it for the same job