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Home Extensions

Impressive Home Extensions Package

Home Extensions.

At Southeast Windows Ltd, we offer an exceptional home extension package. Established in 1999 and based in London, we provide complete single-storey extensions from start to finish. Investing in home improvements enhances your living experience and boosts your home’s value, size, and curb appeal.

Tailored Service from Start to Finish

Our service begins with a FREE site survey to discuss your requirements for the new building. Our skilled tradespersons, based in London and Essex, hold relevant qualifications and take pride in their craftsmanship. We are confident you will be delighted with the final result.

Custom Designs with 3D CAD Drawings.

Side view 2 LivinRoof

Each extension is unique, based on the building’s shape, size, roof design, and your specific needs. Using our 3D CAD drawing facility, we can show you a detailed design of your new extension, allowing you to make adjustments and visualise the final product from inside and outside.

Versatile Design Options

Our flexible design options include French Doors, Bi-Folding Doors, Glass roofs for Conservatories, Hybrid roofs of both Glass and Insulated panels, Solid Roofs for better insulation, and Velux-style windows for added light and ventilation. You can choose from various brick colours, window styles, and RAL colours to match your preferences, ensuring complete satisfaction with the results.

Base Options for Building Regulations

We offer two base options for extensions, updated to meet the latest building regulations as of June 15, 2022: the U-values requirements for building regulations have changed in England. Floors changed from; 0.22W/m2K to 0.18W/m2K.

Digging metre deep footings

Traditional Build: This method removes a large quantity of dirt and requires a 600mm wide by a minimum of a 1-metre deep trench filled with C20/25 concrete. It requires significant excavation and waste removal. If trees are nearby, this can increase to 1500mm deep depending on building inspectors’ recommendations.

The DurabasePlus 100 system is designed for single-floor Extensions and Conservatories. The picture shows weed anti-membrane and steel module frames bolted together and sitting on padstones.

home extension DurabasePlus 100 Base installed
100mm PIR insulation in the floor

Insulated floors and walls exceed building regulations requirements. DurabasePlus 100 offers a quicker, cleaner, and more cost-effective alternative to traditional building techniques. Designed to meet England’s building regulations with a total U-Value of 0.17 W/m²K. It provides better U-Values than traditional building methods, is cleaner and quicker, and comes with a manufacturer’s 25-year guarantee.

Drains.

home extension Drain cover cut out

Building regulations stipulate that you must contact your sewerage company if you plan to build over or close to a public drain. Unfortunately, you cannot build your Extension over a manhole using conventional concrete foundations since manholes need to be accessible by the Water Authority. They need to have full access to the sewer system. Also, internal systems such as manholes have an increased risk of flooding; therefore, building over one would never be advised. Instead, you could look to relocate your manhole if it is affecting your extension building plans. A cheaper alternative is the DurabasePlus 100 system, which can be installed with a cutout in the steelwork for easy access to the drain with a double-seal inspection chamber.

Want to know More?

Call us today for your FREE, no-obligation quotation or fill out our Contact Form! For the most modern, energy-efficient replacement Windows with a 10-year Insurance Backed Guarantee for complete home Comfort & Designed to Keep You Warm, Safe, & Secure.

Alternatively, call your local number below to arrange an appointment.

London East: 020 8472 4088 (head office)
London South: 0203 856 6667
London North: 0203 856 6669
Chelmsford: 01245 208 058
Romford: 01708 202 457
Great Dunmow: 01371 704 771