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House extension planning

We design all types of house extensions for any house type; be detached, terraced, semi detached or bungalow.

They can be categorised as single or two storey extensions, a loft conversion as well as minor structures such as porches and domestic buildings.

We will take you through the whole process starting with the design and planning permission, right through to building regulations and construction stage.


House design plans

See how we can bring your house extension dreams to reality.  Our house plans provide detail down to the very last millimeter.

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Why you should choose us for your house extension planning

No stress

We take the stress out of the whole process for you

Expert advice

With 15 years experience we will help you achieve the development you desire

Planning permission

We help you navigate the pitfalls of the planning permission process

Building regulations

We are by your side up until the construction phase and ensure all building and engineering requirements are met

Considerations of House extension planning

New house


Extending your home is a popular way to increase space and add value to your property. With the hassle and costs of moving house - from legal fees to stamp duty - the reasons to stay put soon mount up.

Family house


Extending your property makes the most of outdoor space, it will be designed bespoke to meet your needs, it will increase property value and it is easier than moving home!

Contract Signature

Lawful development certificate

Subject to certain parameters, householder extensions may constitute Permitted Development.  Atrium will provide a full appraisal of your requirements and ascertain whether you fall into the Permitted Development thresholds and if so will assist in obtaining for you the Legal Document known as a Lawful Development Certificate.

Luxury House

Full planning permission

In some circumstances, the need for planning permission will be unavoidable.  Atrium will guide you through the process and enable you to get the conversion you desire, ensuring  the development is aesthetically pleasing as well as meeting all of your practical and functional needs in terms of living space.

Our house extension planning process

Survey and existing drawings

Accurate measured drawings are required as a basis for design.

Sketch design stage

Design floor elevation plans examining all possible realistic options for design until a favoured scheme emerges.


Developed design to planning including submission of Planning Application / Lawful development certificate.

Technical design

Full specification and working drawings for building regulations

* Structural calculations may be required for wall removals / foundation design, vaulted ceilings etc and enabling works for loft conversions


Completed house extension projects


Outbuilding extension


Single storey house extension


House extension

Our house extension planning in numbers


Over 90% success rate on planning application submission since company inception

14 days

Extremely fast end to end service.  Measured surveys completed on the same day with draft proposal ready within 14 days.

100% UK

We cover all over the United Kingdom, far and wide.  No job too big or too small.  Site visits are available or work can be carried out remotely if necessary.

Client Testimonials for home extensions planning

Matt and his team have been brilliant. He has been very informative throughout the whole house extension planning process. I would definitely recommend to family and friends.

Sian Higgins

Get a FREE quote for your house extension today

We respond within 1 hour

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