The price list and ser­vice fee price list for HSY Wa­ter Ser­vices 2027

The HSY water services price list includes metered charges, basic rates and connection fees. You can read more about the water rates on our website at hsy.fi/en/water-and-sewers/water-rates.

The basic rates and connection fees are based on the property type and the floor area of the property.

The property type refers to the property’s purpose of use. If the property has several purposes of use, the rates will be calculated using the coefficient of the main purpose of use. The main purpose of use is the use which most of the property’s floor area is defined to be used for in the building permit.

The floor area of the property is the total floor area of all the building floors inside the external walls. All of the buildings are counted regardless of whether they have a water connection point. The floor area of the property is defined in section 9 of the Construction Act. The floor area information is determined according to the information in the authorities’ register of property information. The property floor area together with the property type best describe the potential water consumption of the property. Potential water consumption, on the other hand, affects the size and cost of the waterworks network.

You can estimate the amount of your annual water rate with the water rate calculator. You can find the water rate calculator at hsy.fi/vesimaksulaskuri.

Billing for basic and metered charges for the property will start once the connection and use agreements have been signed by both parties and HSY’s water meter has been installed. When a new connection type (water, wastewater, stormwater) has been added to the connection and use agreement, billing for basic and metered charges according to the new connection types will start once the agreement has been signed.

HSY calculates the prices shown in the price list and on invoices excluding tax and using four decimals. Prices including VAT presented in the price list are rounded to two decimals in accordance with the general rounding rules. VAT is charged in accordance with the law in force at the time.

The fees will be valid as of 1 January 2027.

1 Metered charges

The metered charge is based on the amount of water used by the property. It is measured using a water meter installed and owned by HSY. The metered charge is charged separately for water use (water rate) and sewage (wastewater rate).

HSY has the right to invoice on the basis of an estimate before the actual water consumption is obtained from the meter reading (see chapter 6 for general terms and conditions for HSY water services).

2 Basic rates

Basic rate for water and wastewater and the basic rate for stormwater

The basic rate is charged on water and wastewater on the basis of the water supply services used by the property. The unit price of water and wastewater is determined by the use of the services and by the property type and floor area defined in the building permit.

The basic rate for stormwater is charged if the property is located in a stormwater sewerage area or combined sewerage area or has joined HSY's stormwater sewer from outside the stormwater sewerage area. Read more about stormwater at hsy.fi/en/water-and-sewers/tips-for-water-use/stormwater.​

2.1 Small residential buildings (floor area 0–350 floor area-m²)

The basic rate is divided into basic charges for water, wastewater and stormwater by fee category. Small residential buildings include single dwelling houses, double dwelling houses, holiday homes, holiday cottages for rent and condominiums, as well as other detached houses.

2.2 Small residential buildings (floor area over 350 floor area-m²) and other properties

The basic rate P (€/month) is calculated as follows:

P = p x k x PAL
p = service coefficient (0.2–1.0)
k = property type coefficient (1.0–3.0)
PAL = fixed basic rate (€/month) within the floor area categories (A–L

Service coefficient

The basic rate is divided into basic charges for water, wastewater and stormwater according to the following service coefficients (p):

Property type coefficient

Fixed basic rate (PAL)

The fixed basic rate depends on the floor area of the property. Properties are divided into payment classes A–L by floor area. The fixed basic rate for the payment class is calculated by multiplying the floor area shown in the table below by the unit price of the basic rate.

If the floor area of the property changes, for example, through additional construction, so that its payment category changes, the fixed basic rate is calculated according to the new payment class.

3 Connection fees

The connection fee entitles you to connect to the HSY network. The connection fee is based on floor area and the purpose for which the building is used which are determined by the building permit.

The connection fee is separately charged for water, wastewater and stormwater and the service coefficient is the same as applied to the basic rate. In addition to the connection fee, connection work fees are charged according to service fee price list.

Read more about our connection services at hsy.fi/en/water-and-sewers/connecting-to-the-water-and-sewer-networks. You can read more about the costs of connecting at hsy.fi/en/water-and-sewers/connecting-to-the-water-and-sewer-networks/how-much-does-it-cost-to-join-the-water-services and estimate the amount of the connection fee with the connection fee calculator.

The connection fee is always at least on the level of the connection fee category P1 (0–250 m²). More information on connection fee categories can be found in section 3.1.

3.1 Connection fees for small residential buildings (floor area 0–350 m²)

Connection fee

For small residential buildings (floor area 0–350 m² per floor), the connection fees are charged per payment category based on the size of the property and the use of the services. You can check the payment category from the table below.

3.2 Connection fees for small residential buildings (floor area over 350 m²) and other properties

Connection fee

The total price of the connection fee is calculated as a result of the property type coefficient, floor area, service coefficient and unit price.

Connection fee L = h x A x d x yL
k = coefficient according to property type (1.0–6.0)
A = floor area according to building permit (floor area-m²)
p =service coefficient (0.2–1.0)
yL = unit price (€/floor area-m²)

If the property has multiple uses, the connection fee is calculated using the principal use coefficient. The main purpose of use is determined by the building permit.

3.3 Additional connection fee

An additional fee is charged when the floor area of the property determined by the building permit has increased by more than 10 per cent.

In the case of small residential buildings, the additional connection fee also requires the property to move to the next payment class. An additional connection fee is also charged if the services in use on the property or property type change after the connection fee has been determined. An additional connection fee is charged even though there is no water supply point in the floor area.

The customer must notify HSY of changes in the purpose of the property or part of the property or extensions or building additions at least one (1) month before the premises are taken into use or the change otherwise occurs.

4 Special cases

For buildings with no floor area (for example, car parks), the connection fee is primarily calculated on the basis of the total area. If the property does not have a floor area or total area, the payments are determined on a case-by-case basis.

5 Other fees​

A paper invoicing surcharge as specified below will be charged for invoices delivered by mail. In future, the invoicing surcharge will be shown on all of your invoices if you use a paper invoice.

We recommend switching to electronic invoicing, in which case no invoicing surcharge will be charged. Electronic invoicing methods include email invoices, e-invoices ordered from online banks and electronic invoices for companies.

We will charge a payment reminder fee of EUR 5.00 per reminder for late payments. VAT will not be added to the payment reminder. In addition, we charge interest on overdue receivables in accordance with the Interest Act in force at the time.