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Side Return Extension

This video presentation profiles the work required for the design and construction of a single storey side return extension. ...more info >

Side Extension

Side Extension Many terraced houses have a side extension that's usually used for garden storage, but which could be used to widen what is often a long, narrow kitchen. The biggest benefit of a side extension is the additional width gained for the kitchen. ...more info >

Kitchen Extension

Side Return Kitchen Extension This is a visualization of a kitchen extension in the Fulham area that we will begin in the New Year. Our architect worked closely with the client in the production of these images to ensure their satisfaction with all aspects of the design. ...more info >

Rear Extension

Rear Extension If you have sufficient space in your back garden, a rear extension has enormous potential to change the dynamic of your home. For example, this type of home extension utilises internal alterations to create an open plan living area with a pleasing prospect of your garden. ...more info >

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House Extension

Sigma Construction specialise in house extensions.

We have many years’ experience in building house extensions. Together with our architects and structural engineers we work to create the perfect extension, constructed to your specifications, and designed to fit in with the style of your property.

Whatever your needs we can help:

single storey house extension
double storey house extension
garage extension
dining/kitchen area extensions
bedroom extension
conversion houses to flats
loft conversions

Building an Extension Process

Our experienced team will arrange at your property Free Initial discussion and consultation. This will allow us gain understanding of the site, your requirements and project potential and it’s feasibility.
Within a week Free no obligation fixed price quotation will be sent to you.
Once you are happy and you want to place an order, written contract will be drawn up for your project which will explain responsibility of both parties and set out payment schedule, a deposit will be taken.
Our in-house architect will visit your property and carry detailed survey. He will produce specifications and drawings, once you completely happy with the plans we will move to the next step.
Plans will be submitted on your behalf to the Local Authority for approval; we will monitor progress, and update you. On acceptance of planning consent we will agree building work commencement date.
During the course of construction works. A director of the company acts as a project manager and makes regular visit to the site to monitor progress, safety, cleanliness, adherence to building regulations and quality control. We understand that most of our customers need to living in their home while the work is happening. We carry the work in the way to cause minimal disruptions.
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020 7461 0506