Only in suburban and rural locations, where there was less demand on land during the Victorian period, did residences have bigger gardens, sometimes with a high wall, hedge, or set of railings to provide seclusion and mark the house's borders from its neighbors and the outside world. In cities and suburbs, where most people lived in apartments or row houses, they got the idea of keeping things tight and trim by renting out the extra space under their feet. So urban homes had lots of little windows and doors which provided access to owners who might live or work on the third floor.
They also had small gardens because that's all the space you were given. Apartments and townhouses were built with limited yard capacity so if you wanted a garden, you needed to be creative about how you used what was available. Some people created flowerbeds inside their apartment buildings, but that wasn't always easy or convenient. Others built raised beds or terraces, but that took time and effort too. Still others bought plants at a grocery store and brought them home stuck between the layers of their luggage, but even those options were limited compared to people who had yards to grow flowers and vegetables for food.
In the country, where land is more plentiful, people tend to build larger homes with room for family and friends. They also keep them natural looking with the assumption that people will want to get close to it!
Victorian terraced houses, no matter how well they were built, are likely to have very thin walls, and their general proximity will produce some noise pollution in many circumstances. The main sources of noise are the traffic on nearby roads and pedestrians walking past your window.
If you live in a Victorian terrace then you should know that there is a chance that someone else may not like the way you cook or party at home, and they might try and complain about it to your landlord or house management company. Any complaints made against you will be written up in what is called a 'letter of objection'. These letters are easy to find if you search through old newspapers online.
A lot of the time tenants will just make things up about their neighbours so they can be moved out of their apartment. This is especially common with people who want out because of the noise pollution from parties or drunk people. If this happens then you will probably get a letter too. Even if you aren't complained about directly, your landlord will still write to you and tell you that there are problems with other tenants' activities that they are worried you will take part in.
In conclusion, Victorian terraces can be noisy due to the thin walls and general population of people living in them.
Terraced housing was ubiquitous before the Victorian era, contrary to popular opinion, with many Georgian buildings in London built inside a terrace. The Victorians improved on this design by adding upper floors and new rooms within the existing houses, creating more spacious homes for their families.
They were also much cheaper to build than single-family homes, which is probably why they were used so widely. A terrace of four similar houses cost about the same as a house with a garden, but you could easily rent out these rooms. This is how the middle class lived until around 1850, when the first true suburbs were developed. After this time, only very rich people could afford to live outside the city limits.
The cheapest way to build a house in the Victorian era was in brick or stone with a flat roof. The average price of a house in London in 1851 was £5,000 (about $500,000 today), but a terrace could be bought for as little as £120 ($12,500).
You can see examples of Victorian terraces in London at the Greenwich Park Museum. This area of London was called St. George's Yard, and it was originally laid out in 1616 as an airfield for flying machines!