Give your home a new life
Call us:
01604 591 211
07900 950 618

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Why Choose Rigas?

If you are happy with the location of your home, but need more space the ideal solution is to have a house extension. This will allow you to create the perfect space you need and add value to your property.

At Rigas Building Contractor we specialise in creating functional and practical home extensions and loft conversions to the highest standards that meet your requirements and your budget.

All contracts we undertake are overseen at every stage of the project ensuring that attention to detail is paramount and that you are always happy with the progress of your  extension.

We involve the local authority at every stage of your project, ensuring that it is fully compliant with current regulations.

If you would like to discuss having an extension added to your property with our builders please call us or fill in our call back form.

Step by step guide


When you call us we will arrange a free consultation at your home and will make a quick survey to your house. Then we will advice you on what is most suitable for your property.

Planning Permission and Building Regulation Approval

Some house extensions require planning permission but all of them require plans and building regulation approval. We can prepare all architect drawings and submit a planning application and Building Regulation application on your behalf.

Building your house extension

When all drawings and structural calculations are ready and approved, the work begins:



installing damp proof course and ventilation

construction of walls



installing the windows

insulation and ventilation – we’ll fully insolate and ventilate your extension to Building Regulation

plumbing, heating and electrical – You will be supplied with all relevant certificates

walls and ceilings- lined with plasterboards internally and finished with skim coat of plaster

installing doors and all joinery

painting and decorating

completion certificate

How long will it take?

Design, drawings and structural calculations – 2 to 3 weeks

Planning permission (if required) – 7 to 9 weeks

Building Regulations approval – 1 to 8 weeks

Construction of Single rear extension – 8 to 9 weeks

Construction of Double rear extension – 12 to 13 weeks

Construction of Single site extension – 9 to 10 weeks

Construction of Double site extension – 13 to 14 weeks

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For a free, no obligation estimate call us
01604 591 211
07900 950 618
alternatively, complete the form and we will call you!


Have a look at some of our recent house extensions or go to our facebook page to see some videos of our work.

House Extensions in Northampton