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The Extension House Ltd

Based in Liverpool we are a reputable local business specialising in domestic extensions and conversions in Merseyside and the surrounding counties. We offer a friendly and accessible service that is fast and easy to understand.


We are qualified Building Surveyors with extensive experience throughout a wide range of domestic and commercial projects.  We have unique expert knowledge in Construction, Fire Safety, Planning and Building Regulations.


We are best placed to provide a reliable and speedy design service that enables you to start building quickly.




We offer accurate advice and guidance to all of our customers to help them  achieve their ideal space and fulfil their legal obligations.


We provide high quality, fully-scaled plans with technical specifications. Our plans will be suitable for Planning and Building Control approval. Builders will be able to provide quotes from our drawings.


Your complete drawing pack will include:

  • Existing & proposed floor plans

  • Existing & proposed elevations

  • Technical specifications

  • Key construction details


All of our plans will be designed to comply with the latest Fire Safety regulations as standard to ensure that you and your family are safe. We will always offer free advice on how best to upgrade your property as an integral part of our service.  


- Single storey extensions

- Double storey extensions

- Garage conversions

- Loft conversions & dormers

- Outbuildings and garden rooms

- Internal & structural alterations

- Fire safety upgrade works


We recognise that all businesses, including The Extension House, have an effect on the environment. In order to minimise our environmental impact, we have taken the following steps:

  • We reduce waste through recycling.

  • Whenever possible we reduce travelling and reduce air pollution.

  • Paperless office.

  • We aim to continually improve our environmental performance and sustainability as a priority.

54 St James Street Outside - Womens orga

The Extension House Ltd

54 St James Street


L1 0AB

United Kingdom

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