An extension is a building project that involves adding space to an existing building. When you are looking for a loft conversion, you are going to be adding your own loft area to the top of an existing house. The loft spaces can be used as additional bedrooms or living rooms. Loft conversions often cost more than house extensions because they involve constructing new floors, walls and ceilings in addition to installing new windows and doors.
The difference between loft conversion and house extension is that a loft conversion involves the converting of an existing building into a new residence, whereas house extension involves the construction of a new building on an existing site.
Loft conversions are often used to create multi-purpose spaces, such as lofts within houses, but they can also be used to create more spacious living areas, such as lofts within apartments. Loft conversions are particularly common in London and other parts of the UK where there is a large demand for affordable housing, particularly in inner-city areas where there is little room for further development.
Loft conversion is the process of converting a loft into a habitable room by adding walls, ceilings and flooring. Loft conversion is a popular way of increasing the usable area in an existing room or building. When you convert a loft into a habitable space, you can increase the number of rooms in your home without having to add on to it.
House extensions are often used to increase the size and/or specification of an existing property. They can also be used to provide additional space at the rear or side of a property, or even to create extra bedrooms in a two-bedroom property. House extensions are most commonly found in rural areas where there is less demand for housing than in urban areas where there is a high level of demand for housing.
House extension is the process of extending an existing building beyond its current footprint, usually by adding extra rooms or using unusual building materials. House extensions are typically not as expensive as loft conversions because they require less work and planning than an entire new build with all new plumbing, wiring and roofing systems.
House extensions are most commonly found in rural areas where there is less demand for housing than in urban areas where there is a high level of demand for housing.
Find more differences here at https://www.judgesbuildingservices.uk/loft-conversion-vs-house-extension-which-one-should-i-choose.