Stromwater fee
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hulevesimaksu@porvoo.fi
Email service for the stormwater fee. Service closed for summer break from June 29 to July 12, 2026.
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019 520 5507
Telephone service for the stormwater fee. Service hours: Tuesday, Wednesday, Thursday 9.30am–11am. Service closed for summer break from June 29 to July 12, 2026.
Stormwater management in areas covered by a detailed plan has been transferred from water utilities to municipalities due to legislative reforms. Previously, the stormwater fee was included in wastewater charges.
The stormwater fee funds the management of rainwater and snowmelt in Porvoo. This helps prevent flooding, protects the environment, and benefits all residents.
Stormwater fee billing 2026
Who will receive the invoice?
- The fee applies to built properties in areas with a detailed plan.
- The invoice is sent to the property owner or tenant.
- The fee is charged even if the property is not connected to the stormwater system.
- The fee is not charged for vacant plots or for properties where construction is still ongoing.
When is the invoice sent?
- The stormwater fee is invoiced once a year.
- Invoices are sent in several batches starting in September.
- The payment term is 14 days.
How much is the fee?
- The fee is based on the number of buildings, their floor area, and their purpose of use. See the price list below.
Do you want to request a revision of the invoice?
- If you request a revision, please pay the invoice by the due date. Any refund will be issued later.
- You can request a revision within 14 days of receiving the invoice by submitting a claim via the ePorvoo service.
- Before submitting a claim, review the conditions for possible exemptions or reductions.
Annual stormwater fee by property category 2026
Table A: Detached houses, holiday homes, semi-detached houses, terraced houses, apartment buildings
The fee is based on the number of buildings and their purpose of use. If a property has several buildings and/or different building types, the fee is calculated by multiplying the price for each building type by the number of buildings.
| Property category | Price € / building |
|---|---|
| Detached house or holiday home | 40 |
| Semi-detached house | 80 |
| Apartment building with up to two apartments | 80 |
| Terraced house | 150 |
| Apartment building with at least three apartments | 400 |
Table B: Industrial, commercial and other buildings
The fee is based on the total floor area and the building’s purpose of use.
Other building category:
- For buildings classified as “Other buildings”, the total floor area of all such buildings on the property is combined.
- A fee for this category is charged only if the property does not include buildings from other categories.
- If the property includes other building types, no fee is charged for “Other buildings”.
| Property category | 0 – 2999 m2 | 3000 – 4999 m2 | 5000 – 9999 m2 | 10000 –24999 m2 | 25000 –99999 m2 | 100000 m2 – |
|---|---|---|---|---|---|---|
| Industrial and commercial buildings | 400 | 600 | 800 | 1200 | 1400 | 2000 |
| Other buildings, total floor area under 150 m2 | 50 | 50 | 50 | 50 | 50 | 50 |
| Other buildings, total floor area 150 m2 or more | 200 | 300 | 500 | 700 | 800 | 1000 |
Examples of fee calculation
- Property 0 – 2 999 m2 with 3 detached houses, 4 semi-detached houses and 2 industrial buildings:
3 x 40 € + 4 x 80 € + 1 x 400 € = 840 € - Property 3 000 – 4 999 m2 with 1 detached house, 2 semi-detached houses and 1 auxiliary building (other buildings, total floor area under 150 m2):
1 x 40 € + 2 x 80 € + 0 x 50 € = 200 € - Property 0 – 2 999 m2 with only 2 auxiliary buildings (other buildings, total floor area under 150 m2):
1 x 50 € = 50 € - Property 3 000 – 4 999 m2 with 2 apartment buildings, 1 terraced house and 2 auxiliary buildings (other buildings, total floor area over 150 m2):
2 x 400 € + 1 x 150 € + 0 x 300 = 950 € - Property 5 000 – 9 999 m2 with 2 industrial buildings:
1 x 800 € = 800 €
Requesting a revision of the stormwater fee
You may apply for an exemption or a reduction under certain conditions. Even if you request a revision, please pay the invoice by the due date. Any refund will be issued later.
You can request a revision within 14 days of receiving the invoice by submitting a claim via the ePorvoo service. The same form can also be used to update your billing information.
Before submitting a claim, please review the conditions for granting an exemption or a reduction.
Questions and answers about the stormwater fee
What is the stormwater fee?
The stormwater fee is used by the City of Porvoo to fund stormwater management in public areas. Stormwater refers to rainwater and snowmelt that flows from surfaces such as roofs, yards and streets.
The city is responsible for managing stormwater in areas covered by a detailed plan. This includes, for example:
- construction and maintenance of stormwater sewer systems
- roadside ditches and drainage channels
- various structures for delaying, absorbing and treating stormwater.
Read more about stormwater management:
Why do I need to pay the stormwater fee?
- The stormwater fee is based on legislative reforms to the Land Use and Building Act and the Water Services Act in 2014. As a result, responsibility for stormwater management in areas with a detailed plan was transferred from water utilities to municipalities.
- In Porvoo, the stormwater fee was introduced at the beginning of 2025 by decision of the City Council.
- The stormwater fee is based on legislation. The fee must be paid even if the property is not connected to the stormwater system.
- The stormwater fee is a fee under public law and directly subject to enforcement.
Which areas and properties are subject to the stormwater fee?
- The fee applies to built properties located in areas covered by a detailed plan.
- Your property does not need to be connected to the stormwater system to be subject to the fee.
- If a building on the property is still under construction, the fee will not be charged. The property becomes subject to the fee once the commissioning inspection has been carried out.
- The fee is charged regardless of whether someone lives in the building or not, and even when the building is in bad repair.
Map of the area where the stormwater fee is applied
Who will receive the invoice for the stormwater fee?
- The stormwater fee is invoiced once a year. Invoices are sent in several batches starting in September.
- The invoice is sent to the property owner or to the tenant of a city-owned plot.
- The person responsible for the stormwater fee is the owner in the land register or the tenant recorded in the city’s invoicing system, as of March 2. If the property is sold after this date, the buyer and seller must agree between themselves who will pay the invoice.
Do I have to pay the stormwater fee if water is absorbed on my property or flows to a lake or a ditch?
The stormwater fee applies to all built properties in areas with a detailed plan, regardless of whether the water is absorbed into the ground or directed to a ditch, water body or stormwater system.
The property does not need to be connected to the stormwater system to be subject to the fee. The stormwater fee is a public law fee based on legislation, not on a contract.