Changing a roof pitch can have a remarkable impact on your home, improving both its appearance and functionality. This process offers numerous benefits, such as enhanced insulation and the addition of extra living space. However, before embarking on this project, it is crucial to understand the associated costs and the entire process involved in changing your roof’s pitch.

Do I Require Planning Permission for Changing My Roof Pitch?

One of the major considerations when altering your roof pitch is acquiring the necessary planning permission. The government mandates these permits for any changes that increase the roof’s height by 150 mm or more. It is important to note that alterations affecting less than 25% of the roof’s structure are exempted and do not require planning permission.

How to Increase the Pitch of an Existing Roof

Changing the pitch of your roof is a delicate process that demands meticulous attention to detail. Here are the steps you should follow to ensure a smooth process:

  • Evaluate the existing roof structure and determine the desired pitch while considering the implications.
  • Prepare the roof deck, rafters, and internal walls accordingly.
  • Change the pitch while carefully maintaining the structural integrity.
  • Install the roofing materials and assess the insulation requirements.

Do not hesitate to seek assistance from a roofing expert such as Multiform Roofing, especially when positioning the trusses over the existing rafters. This task requires at least two people to ensure safe execution.

Factors Influencing the Cost of Changing a Roof Pitch in the UK

The cost of replacing or changing a roof pitch in the UK is primarily influenced by labour and time. Additionally, the steepness of the pitch plays a significant role. A steeper pitch necessitates more safety precautions, resulting in higher project expenses. Take ample time to choose construction materials, as your choices will greatly impact your budget.

Converting a flat roof into a pitched roof typically costs between £3,000 and £5,000. For relatively shallow pitches, expect to allocate approximately £25 per square meter. Although this may require a considerable investment, it is important to note that changing the roof pitch can lead to substantial savings. It improves the insulation of your house, resulting in lower energy bills. Furthermore, if you are experiencing issues such as rot or water pooling, altering the pitch of a roof to pitch becomes a financially sensible solution.

Benefits and Considerations of Changing a Roof Pitch

Changing the roof pitch offers several advantages and considerations worth noting:

  1. Energy Efficiency: A pitched roof reduces the exposed roof surface, thereby reducing heat loss from the house.
  2. Improved Water Runoff: A pitched roof facilitates efficient water drainage, reducing the risk of leaks and interior damage.
  3. Increased Living Space: Altering the roof pitch can provide additional usable space within your home.
  4. Enhanced Aesthetics: The visual appeal of your house can be significantly improved with a roof pitch change.

Expert Recommendations and Additional Tips

If you are considering any roofing project like changing your roof pitch, meticulous planning is essential. By aligning your goals with the project, you can determine the most suitable approach for your specific needs. Do not overlook the cost of materials, as seeking guidance from an expert can be beneficial in this regard. Drawing upon their experience in the field, they can assist you in finding materials that align with your budget. Additionally, ensure that you obtain the necessary permits to avoid future inconveniences.


Changing the pitch of your roof may require a significant investment, often amounting to several thousand pounds. However, the benefits you will reap are well worth it. Improved home insulation and increased living space are just a few of the advantages you’ll enjoy. When it comes to new roof construction, it is advisable to hire an experienced contractor. This ensures not only lower costs but also a smoother and more convenient process overall.

Optimisation by
Call us on 07831 467 878