
In Portland, renting a diesel generator in 2025 typically costs between $150 and $400 per day, $600 to $1,500 per week, and $2,000 to $4,500 per month. These rates vary based on the generator's power capacity and additional features. Leading rental companies in Portland provide a wide range of options suitable for electrical panel upgrades and other projects.
| Vendor | Daily Rate | Weekly Rate | Review Score | Website |
|---|---|---|---|---|
| Equipment Rental Pros | $124 | $312 | 8 | Visit |
| United Rentals | $180–$350 | $540–$1,050 | 8 | Visit |
| Sunbelt Rentals | $180–$350 | $540–$1,050 | 8 | Visit |
| Herc Rentals | $180–$350 | $540–$1,050 | 7 | Visit |
Several factors affect the rental costs of diesel generators, including the generator's size, duration of rental, and any additional services such as delivery and setup. It's crucial to consider these elements when planning your budget.
When renting a diesel generator, be aware of potential hidden fees. These may include delivery or pick-up charges, which can be flat rates or based on mileage. Fuel surcharges, damage waivers, and cleaning fees for returning the equipment in less-than-pristine condition are also common. Understanding these fees can help avoid unexpected expenses.

The demand for diesel generators in Portland is expected to remain steady, driven by ongoing construction and infrastructure projects. Rental companies are likely to offer competitive rates and flexible terms to attract clients. Staying informed about market trends can help you secure the best deals.
Ensure that any rented diesel generator complies with local emissions and noise regulations. This is particularly important in urban areas like Portland, where environmental standards are strictly enforced.