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Detailed plans and maps for builders

The City of Helsinki’s Map Service features many types of maps, including local detailed plans that govern specific areas and cadastral maps of land parcels. Construction drawings stored in the City of Helsinki's Building Control Services Archives can be bought from the online permit service Lupapiste’s shop. Source material for building permits can also be ordered from the Karttakori service. For underground cabling information, you can use the cabling information service, while the Soili e-service has information on soil surveys.

The Helsinki Map Service can provide you with a free copy of the valid detailed plan governing your area.

Follow these steps to access a map in the service:

  1. Select "City and Traffic Planning" from the directory
  2. Select “Valid”
  3. Select "Detailed plan".

The Helsinki Map Service also offers a wide range of other city maps and resources, including:

  • Background maps: Guide maps, cadastral maps, aerial photographs, 3D city models and historical materials.
  • City and Traffic Planning: Under planning and valid detailed plan, master plans and traffic plans.  
  • Real Estates, Unseparated Parcels and Buildings: Real estates, plot divisions index, buildings, etc.
  • Available Plots: Commercial and residential plots available in the city.
  • Environment and Nature: Protected attractions, valuable nature areas, Siberian flying squirrel habitat network, etc.

Go to the Helsinki Map Service 


Lupapiste is a nationwide online permit service. Accessing drawings that are stored in the service is subject to a charge. 

You can buy the following construction drawings from the Helsinki Building Control Service Archives in the Lupapiste shop:

  • layout plans
  • master drawings
  • façade drawings
  • special plans (water, sewer and ventilation systems and structural plans).

Go to the Lupapiste shop (link)

Drawings associated with permits defined as confidential under the Act on the Openness of Government Activities are not available at Lupapiste. These include, for example, building plans for schools and daycare centres. Drawings of buildings used by the armed forces, police, rescue services, social services, health services and education providers, among others, are likewise not available in the service. 
Visit the Building Control Services Archives to view material free of charge. 

Read more on the Building Control Services Archives homepage

Go to the Lupapiste shop


Karttakori is an online service (in Finnish) that allows you to obtain source material for construction planning, in addition to other digital map material.

The following maps are available in the Karttakori service:

  • A building permit map is a mandatory attachment to a building permit application. Building permit maps contain a variety of PDF map extracts, as well as base map and underground pipes and cable map data in a digital format, which is necessary for the preparation of a site plan. A building permit map is valid for 12 months.
  • Digital material for planning and drawing up a site plan. Base maps, underground pipes and cable maps, orthophotographs, lidar datasets and elevation models are also available.
  • A statement of ownership, which identifies a project's neighbours for the purpose of consulting them before the project begins. This applies to those builders who wish to carry out the consultation or “hearing” of the neighbours themselves.

Karttakori is linked to the Lupapiste online permit service, which means that the material ordered does not need to be transferred or printed separately for Lupapiste. The project number of your Karttakori order is the only information stored in Lupapiste, under the “Suunnitelmat ja liitteet (Plans and Attachments)” tab in "Suunnittelun lähtötietoaineisto (Planning source material)".

Go to the Karttakori service (in Finnish)

Contact information: or tel. +358 (0)9 310 22111.

Check the City Survey Services price list for Karttakori material prices (PDF) (in Finnish) 


The city's centralised underground cabling and structure location service, the Cabling Information Service (JOPA), serves those involved in excavation, boring, quarrying and planning work. You must request a cabling survey from the service before starting excavation work. The cabling survey shows the location of cables, pipes and other underground structures in the excavation area.
The service is provided free of charge for necessary excavation works. For other purposes, the cabling information extracts are subject to a charge.
Order a cabling survey via e-services

Order a cabling survey electronically


The Soili service for ground survey information is intended for planning offices only. There you can retrieve soil- and ground surveys and base maps for the area you need, diagrams and cross-sections printed in image file for the area you need, ground survey-  and groundwater data in infra format for the area you need, and rock-reinforced boreholes in CSV format.

Go to the Soili service


The Helsinki coordinate system is the ETRS-GK25 (EPSG:3879) and the height system is N2000.

The coordinate system of the City of Helsinki geographical  data is the ETRS-GK25 coordinate system (EPSG:3879) and the height system is N2000. The systems have been in place since December 2012. The height figures of the previous NN height system will be changed to the N2000 system by adding 305 mm to the height figure.


You can find the following contents on the old webpages: