The Saku municipal council approved the detailed plan for Tänassilma development on 14 June, 2002. The area of about 20 hectares is planned to be divided into 20 plots of production or commercial land ranging from 2.846 to 12.163 sq m. The development shall include only commercial land with possible co-use for associated manufacturing that does not harm the environment, such as logistics, warehousing and low-scale production. Assemblage, packaging and light industry are favoured whereas businesses involving large-scale pollution and production noise are not recommended.
Plans include installation of all the necessary utilities:
Heating: gas heating is possible at very favourable conditions. A gas boiler house can be built if needed.
Power: five new transformer substations will be built for electric energy consumers. Separate plots of 60 sq m each have been set aside for the transformer substations, so that a 2-transformer substation with transformers up to 1.000 kVA can be set up on the plot.
Water for fire extinction is supplied from waterworks built separately from the main water pipeline. The diametre of the fire water pipes is DN100-DN150. Hydrants will be installed as well. In the development's centre there will be a separate fire water tank of 400 m³ useful capacity.
Lighting will be installed for the streets and roads built. Jälgimäe road will also be lit after its reconstruction. Lighting will feature high pressure Na-bulb streetlamps mounted on conical steel masts about 9-10 m from the ground.
Communications will be based on the Laagri automatic telephone exchange (RSS). Communication lines within the development are in an underground pipeline. Each plot will have an individual entry from the main pipeline. Each plot will also get a communication cable of required capacity from the main communication cabinet on Jälgimäe road or from the low-scale communication cabinet (pillar) to be installed.