At the end of 19th century, Slupsk was harassed by threatening epidemics of infectious diseases. In 1886 cholera epidemic, in 1872 smallpox, in 1899 measles. An increasingly greater problem was tuberculosis. In 1900 68 people died on tuberculosis, i.e. 0,25% populations. The Slupsk's health service had at disposal with lazar house (1844) on today's Kilinskiego Street. In next years, town councilors raise built of small municipal hospital (Copernicus Street today's). The hospital was enlarged twice- in 1883 and 1904. The city had at its disposal two agencies of closed medical care- till 1897 (build-up of Town Hall) St. Spirit Hospital and St. George Chapel - together 70 hospital beds.

The suburban area in front of New Gate along way to Slawno grew most quickly. From 1850 new building also embraced a right-bank field of Slupia River. In 1854 the Smith's Gate was decomposed, however the Carpenter's Gate was surrendered to demolition in 1867. The spatial city-planning development lasted in 1868-1874. About 100 buildings were built at that time. While in next ten years, above 250 ones were built. An enterprise construction colony of workmen's flats arose from initiative municipal clerks towards way on Slawno. In following year, a housing association was created.

Along main streets of the city representative tenements were built; Wojska Polskiego Avenue and Anna Lajming Street. In 1867 district court and lands tribunal buildings were given to use. In 1876 a branch of Bank of Reich were located at crossroads of Partyzantow and Armi Krajowej Street. From 1898 the town hall was being built. In 1911, in the corner of guildhall square, the Bank of Slupsk stood up. The sacral building was represented by evangelical church of St. Peter (1860), catholic church of St. Otto (1873) and synagogue built in 1902 on today's Niedzialkowskiego Street. Indispensable investments from of public utilities areas were also undertaken.

In 1862 the institution of gasworks was given into service; the water mains (pumping station) together with sanitary sewage system in 1898; and in December 1900 - city electric power plant, powered of steam. In 1910 Slupsk used up 1 million kWh (most of hydroelectric power station in Zgojewo), town gaseous lighting (722 lanterns) was replaced by electrical. The new electricity generating board was built 1912, in 1917-1918 was given 4,4 millions kWh by it. The city received tram communication, which transported about 690 thousands of people in 1913.