British made certain charges in the streets of Galle fort. Due to development of areas which were not developed during Dutch period and construction of buildings in those areas, Streets spread there. New roads came up in the areas left abandoned during Dutch period having been developed
* Street known as new Leyn Baan Street became Hospital street with the commencement of the.
* Rest of Parwa street became Modara Bay
* Kuda Veediya and Nava Veediya were made connecting Lighthouse Street and Lehn Baan Street through several unpopulated land areas.

With the expansion of harbour operation, two jetties were added to Galle harbour in the 18th century. Old jetty made of wood was developed as a passage jetty. One jetty was developed as an import jetty and the other was developed as an export jetty. By the time British governance ended, Galle harbour was equipped with 05 jetties. It appears that British mostly used bricks, cement, steel and iron to construct jetties. For construction of an additional jetty, Galle customs had spent Rs.66,000/- in 1913AD. In the year 1927AD a cost of Rs.10,800/- was incurred to widen no 03 jetty, or the import jetty of Galle harbour. Similarly, to develop the passenger jetty and export jetty British government had spent Rs.44,000/-
Concurrent with the expansion of harbour activities buildings to provide harbour related services were newly built and some old buildings also were renovated to suit that purpose. During mid 18th century, Harbour Master’s office was located in the right hand side first floor of the old warehouse building near the old gate and the office was then called master’s Attendance office. Office of the collector of customs was in the first floor of the left hand side of the same building. That part of the warehouse building had been reinforced with flight of steps strengthened with arches and large windows were felted to the warehouse building. Those can be quoted as architectural alterations done by British to renovate the building to suit the requirements.
Coal stores owned by private shipping companies supplying naval services; granaries and board yard associated institutions were housed in some of those buildings.

* Entrance road through old fort gate took the name “Custom Road’’
* With the construction of the lighthouse near Kodigala at the end of the road known earlier as De zee Berg straat in 1848, it was named Light House Street.
* In 1873, that road was further extended between sun tower and moon tower and a new gate was opened to pettah.
* Open spaces in the middle of groups of buildings in the old Galle fort gradually became service streets or “Ally streets’’ later.

It was in 1894Ad the dry toilet system was introduced to residents of Galle fort. That toilet system was tried out for 08 days on Cando Street and Parwa. Street by sanitary officers of Galle municipal council. Until that time sewage from house in Galle fort were disposed through an underground drainage system constructed from under the streets by Dutch. The drainage system was above sea level and cleaning drainage was carried out daily. It is clear that the initial constructions of the sewage disposal system dates back to Dutch period.
Due to emission of stink as a result of dried up sewage inside the underground ditches for a long time since mid-19th century sea water was put into the drainage system using carts to clean those underground drains water for that work was procured from a windmill installed near Triton watch tower. Instead of transporting water from the windmill using carts, Galle municipal council made arrangement to lay 2000 reef clay pipes to underground drains through streets where needed from Triton watch tower thus facilitating the cleaning of those underground drains.
Leaving the Dutch sewage disposal system to dry up for long durations formed breeding places to harmful insects and accumulation of refuse continued resulting a cause for diseases. Galle municipal council taking steps to change the swage disposal system at a cost of Rs.3,280/- can be cited as an example of showing the influence of British architectural techniques. The construction of the sewerage at that time above 4 feet sea level can be identified. The sewerage was completely repaired by municipal council charging its shapes to circular cross sectional form after removing coral, giving it an arch shape with brick and cement sides and laying a stone base. Side drains of Lighthouse Street and peddler street also were re constructed using cut granite.
Use of sewerage system went out of use with introduction of the dry toilet system by Galle municipal council after 1894 AD. That was a cause directly influenced to changes in structural plans of buildings in Galle fort and also the town plan. The old toilet system in the old house in Galle changed with this new system particularly due to introduction of Bucket toilets the house owners had to provide a separate side way adjacent to houses along outside for the scavenger to carry away the bucket full of excreta. This passageway is constructed in each shape or rectangular shape. As a special feature it had a small door to enter. Specs left an open land within groups of building also had to be converted to service passages or “alley ways’’ for the use of scavengers and that was a major reason for the change of Dutch architectural plan in the Galle fort’ Old residents of fort way that until the water seal toilet system was introduced to the buildings in Galle fort by Galle municipal council, that old system of disposing excreta was in use.
British government collected from resident in Galle for lightning streets from 1824AD. Lamps were mounted on wooden posts spaced about 200feet and those posts were replaced later with cast iron posts imported from England. This system of Lighting Street continued till 1925AD.

It was in Ceylon the British colonists first started the horse coach service. This service was started in 1832AD from Colombo to Kandy during the period of governor Robert William Horton (1832-37AD). Similarly the speed postal bag service from Galle to Colombo was started during British period. The pioneer of this service operated as pigeon express by server newspaper was a businessman named Dr. Elliot.