Average building footprint
93.3 m²
50.1 m² less than the Oulu average
Postcode area · Oulu
Drainage renovation in postcode area 91200 Yli-Ii
Local buildings, soil conditions and rainfall affect how perimeter drainage, stormwater and ground grading should be designed in 91200 Yli-Ii. Enter your address to see a property-specific plan, a binding price and the option to order the renovation online.
Enter address and see priceBuilding stock
3,223
Buildings
Area
382.9 km²
Streets
101
Residential buildings
15.8 %
Annual rainfall
608 mm
23.3 mm more than the Oulu average
Average temperature
3.1 °C
0.6 °C lower than the Oulu average
Building types
What types of residential buildings are found in 91200 Yli-Ii?
Low-rise residential buildings are divided into detached, semi-detached and terraced houses by dwelling count. Apartment buildings follow the open Ryhti building classification.
Detached houses
430
88.7 % of these residential buildings
12.1 percentage points above the share in Oulu
Semi-detached houses
7
1.4 % of these residential buildings
5.2 percentage points below the share in Oulu
Terraced houses
25
5.2 % of these residential buildings
4.2 percentage points below the share in Oulu
Apartment buildings
2
0.4 % of these residential buildings
6.5 percentage points below the share in Oulu
The classification covers 45.1% of buildings in the area. A more precise type could not be assigned to 21 low-rise residential buildings because dwelling-count data was missing. The classification describes building type, not ownership or housing-company status.
Local rainfall
What does 608 mm mean for a house?
Water does not disappear from a property on its own. Roof water needs a stormwater system, surface water needs correctly graded ground and water in the soil needs perimeter drainage to carry it away from the foundations.
The area managed by the drainage and stormwater systems receives an average of
218,000 litres
per year. The estimate is based on an average detached house in 91200 Yli-Ii, with a building footprint of 166 m², plus the three-metre zone around the building.
Where does the water go at your home?
Ground grading directs rain and meltwater away from the building. The stormwater system carries roof water away in a controlled manner, while perimeter drains remove water accumulating beside and below the foundations. All three need a safe, working discharge route.
One less worry for your home
When water flows the right way, home can feel like home
Working perimeter drainage, a properly designed stormwater system and correct ground grading carry water away from the building. Good moisture management is almost invisible in daily life. That is exactly how it should be.
Salaojapiste also makes buying the renovation clear. You see the solution for your home and the price in advance. Every Salaojapiste renovation has a clear beginning and end, and you can continue online all the way to the contract.
See the solution for your homeFinland's first online store for drainage renovations
From price directly to order
This is more than a price calculator. We have already reviewed the building and checked the soil, where water loads the property, where it can naturally discharge and how the buildings are positioned on the plot. See what we found.
- 01
Choose your building
Enter the address and select the building on the map that the renovation concerns.
- 02
See the plan and price
You receive a site-specific renovation plan and a clear total price.
- 03
Order the renovation online
When you are ready, approve the contract and buy the renovation directly without intermediaries.
Price, plan and order
See the price and order a drainage renovation 91200 Yli-Ii
Enter the address and choose the building. With a few additional details, you receive the total price and can continue all the way to the contract if you wish.
Start here
Enter your address
Select your address to see how easily you can get a price for your renovation from us. Welcome to renovation buying done one step better!
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Soil data from GTK
What soil types are found in postcode area 91200 Yli-Ii?
3,208buildings
Coarse-grained soil60.5 %
Mixed-grained soil15.4 %
Sandy till6.3 %
Fine sand4.6 %
Thick peat layer4.6 %
Other soil types8.7 %
The most common surface soil type is Coarse-grained soil. This soil underlies 60.5 % of the buildings in 91200 Yli-Ii. the Oulu average the corresponding share is 4.7 %.
Area ranking in the municipality
How does 91200 Yli-Ii compare within Oulu?
91200 Yli-Ii is compared with the municipality's 47 postcode areas.
01
Number of buildingsRanked 14
02
Average building footprintRanked 36
03
Annual rainfallRanked 4
04
Average temperatureRanked 44
Location on the map
91200 Yli-Ii
The map shows the postcode area's official Paavo boundary. Use the address search to open the building, property and property-specific planning flow.
See the price for your addressDrainage renovation street by street
Choose a street to explore its building stock and local rainfall. From the street page, continue to the plan and price for your exact address.
Other postcode areas in Oulu
Compare building stock, soil and moisture-management conditions across the municipality's postcode areas.
Frequently asked questions
What does a perimeter drainage renovation cost in 91200 Yli-Ii?
The price depends on the building's size, drainage length, soil, working space, surfaces to be reinstated and the water discharge route. Enter the exact address to receive a property-specific plan and price.
How does soil affect a drainage renovation?
Soil affects excavation, trench construction, water movement and the machinery that can be used. Area data provides local context, but each property is always analysed separately.
Why does rainfall management matter?
Perimeter drainage, roof water, ground grading and a safe discharge route form one moisture-management system. Replacing drainpipes alone does not address every source of water load around the foundations.
Sources: the Finnish Environment Institute's Ryhti building data, Posti (postcodes, postal towns and BAF address ranges), Statistics Finland's Paavo data (postcode area boundaries), the National Land Survey of Finland (buildings), the Geological Survey of Finland GTK (surface soil) and the Finnish Meteorological Institute (rainfall and temperature data for 2016–2025).