Building Extensions

Home and Office Building Extensions in Sussex


From building a little porch or patio extension for your home to constructing a two-storey office building to help your business to expand, there are many reasons why you might want to consider a home or office extension.


Extending your property is often the only way, apart from moving house, to accommodate a growing family. Other extensions that are popular are uPVC, aluminium or timber conservatories or the more substantial ‘orangery’, both ideal for creating a warm, attractive space during the spring and summer months.


The prices of an extension can put some homeowners off considering one while others are daunted by the planning and building regulations hoops they anticipate having to jump through.





However, building an extension can be much more economical than moving house and has the added benefit of increasing the value of your home while giving you full control over your new living space. In fact, building an extension can be an exciting time for your family as work nears completion.


In addition, you may not need Planning Permission, even for larger extensions.


Home and office building extensions Sussex – Planning Permission
The rules for planning permission vary depending on your specific area, so be sure to check with your local planning office, details of which can be found on the Local Authority website.


In general, extensions are Permitted Development as long as all of the following constraints are in place:


  • The property is not extended forwards (or sideways if this faces a main road)
  • The extension covers no more than half of the land around the original building (inclusive of existing extensions)
  • The extension is no more than 3m from the original wall (4m if detached)*
  • The materials used are similar in appearance to the original building
  • Windows of side extensions are obscure-glazed and non-opening (below 1.7m)
  • The extension is no taller than the existing roof and no more than 3m tall if multi-storey
  • There are no verandas, balconies or similar raised platforms


*A concession is currently in place (until May 2016) allowing larger extensions to be considered Permitted Development, subject to a Neighbourhood Consultation Scheme


If Planning Permission is required, expect to wait at least eight weeks for a decision.



Home and office building extensions Sussex – Building Regulations
Apart from the simplest type of porch or patio extension, any home or office extension will need to be given Building Regulations approval. This will involve looking at aspects such as:


  • Foundations
  • Flooring
  • Sub-structure (underground walls)
  • Support of structural openings (e.g. doors and windows)
  • Energy efficiency
  • Ventilation
  • Drainage


Technical Building Regulations approval can take a further six weeks or more before work can begin.


Please call us on Eastbourne Office – 01323 472 726 or Brighton and Hove – 01273 468 255 .