Loft Conversion Vs Extension | Amazing Loft Conversions

Loft Conversion Vs Extension

Loft Conversion Choices to Make
Should I Design My Own Loft Conversion?
Show all

Which is better, a loft conversion or an extension? 

The answer to that will ultimately depend on the property being converted/extended as some properties will automatically lend themselves to one or the other. 

Extensions will usually be built on the land around the existing house, most often in the back garden; if the back garden is tiny or if an extension has already been built in the garden, it might be better to convert the loft. 

Conversely, some properties may have lots of land around them and a relatively small roof to convert, which would lend them more to being extended. 

If a client has sufficient budget and space around the property, the best option is to do both at the same time! 

Pros and Cons 

Here is a list of items which apply to both loft conversions and extensions with comparisons. 

Getting approval 

Both loft conversions and extensions can be completed under what is known as ‘permitted development’, whereby you don’t need to make a planning application to the local authority as long as you meet certain criteria. 

For an extension, this means limiting the extension at the rear of the property and single storey only. The extension cannot take up more than 50% of the empty land around the property, which includes previous extensions if they have been made since 1948. 

A loft conversion under permitted development can only have roof lights at the front of the house, but dormers at the back. Dormers, hip-to-gable or mansard conversions which affect the shape of the front or sides of the roof require planning permission, as do balconies. 


Every project is different, but on balance, the design of a loft conversion is probably trickier because there are more constraints on space and where things like windows and stairs can go. There are, however, fewer things to design in a loft conversion. 

An extension will usually need not just walls and windows but: 

  • Drainage 
  • Foundations 
  • A Roof 
  • Steel beams to support new entrances in the existing property 


The construction pros and cons will vary drastically depending on the size and complexity of a project. 

A simple loft conversion will be cheaper and quicker to build than a large extension and vice versa. 

Loft conversions will usually require scaffolding to at least one elevation of the property and may need the whole house to be completely covered for a sufficiently large project.  

Mansard and hip-to-gable loft conversions require the removal of a lot of the existing roof, replacing the old timber rafters with new ones which provide more space inside. Timber has become very expensive over the last five years and has increased in price more than any other product in construction. 

An extension will also require timber for the roof in most cases, but flat roofs will be much cheaper and simpler to build than a dormer or mansard roof on a house. 

Extensions may still need scaffolding if they are two storeys in height, but they will also need foundations, which can be quite substantial if the ground is poor or contains lots of clay. 

An extension will often connect to the existing property through a new opening in a wall which will need to be supported by a steel beam in most cases. 

If you are not sure whether your house would suit an extension or a loft conversion more, give us a call and we can help you, as we have a great deal of experience with both! 


Amazing Loft Conversions
Amazing Loft Conversions
We help people live their dreams by converting their dream space into reality, we will convert all types of loft spaces into amazing dream spaces. For every loft space we have a creative design and for every loft challenge we have a creative solution. South Yorkshires premium loft conversion specialists delivering highest standard workmanship, and values, will help you convert your empty unused loft space in your dream space, big or small, large or tiny we will convert to suite your needs. We work with wealthy homeowners all around South Yorkshire and help them convert unused loft space into amazing dream space. If you want a basic loft, loft with a dormer and ensuite or install a Velux cabrio balcony, we have a solution for you. It's about the little things. It's about our customers being at harmony with their home from the moment they walk through the door. It's about the feeling they get when sitting with their morning coffee looking out from their newly built home extension. And it's also about waking up, opening the loft room balcony doors and enjoying the morning sun. You see, at Amazing Spaces, we consider the emotions involved when renovating homes. We think about how our customers will feel not just what they will see. Gone are the days where a loft conversion was typically for a child's bedroom or office. New technology allows us to turn unused space into a dream location with a walkout balcony and extended roof. Wake up or work in harmony with a room that inspires. With over 20 years of my personal experience converting spaces all around the world I have set up and build loft conversion business. I am passionate about converting loft space into something beautiful and wonderful in all areas. Within my journey I have built a team of strong and hard-working man who help us deliver the service and bring the values to all our clients and meet all their needs. Most of team members have over 15 years of experience in all types of works. All our combined experience is over 100 years. Having multiskilled people working along side is the key for our success in loft conversions. Working on lofts in past few years I have developed best ways to make sure your journey with us is easy and joyful. With many types of lofts and challenges we have all the right and best solutions for all your needs. We say that words don’t speak but your action will speak about you.

Leave a Reply

Your email address will not be published. Required fields are marked *

Start a Project Call 0114 3999 817