If market trends are observed keenly, then you may notice that bungalows are the most sought type of property in the UK. So, from the investor's point of view or general perspective, bungalow extensions pave the way for one of the healthiest returns on investment. Generally, the bungalow extension may cost £20,000, but this cost may go up based on luxury or different options embedded into the property. Due to the degree of luxury, it is quite difficult to define the minimum increase such extension would bring to the property. However, it is generally observed that returns are substantial and quite decent.