SipCon
Construction & Building Services
Building Quality. Creating Space. Delivering Excellence.

Question 1

How much does a house extension cost?

Answer

The cost depends on the size, design, specification, and ground conditions. As a guide, single-storey extensions typically start from around £2,000–£3,000+ per square metre. We provide detailed quotations following a site visit and consultation.

Question 2

Do I need planning permission?

Answer

Many extensions fall under permitted development rights and may not require full planning permission. However, this depends on the size and location of the project. We can advise you and manage the application process if required.

Question 3

Will I need Building Regulations approval?

Answer

Yes. Almost all extensions require Building Regulations approval to ensure the work meets current structural, thermal, and safety standards. We can arrange and manage this on your behalf.

Question 4

How long does an extension take to build?

Answer

A typical single-storey extension takes between 8–16 weeks, depending on size, complexity, weather conditions, and material lead times.

Question 5

Can I stay in my home during the build?

Answer

In most cases, yes. We work to minimise disruption and maintain a safe working environment throughout the project.

Question 6

Do you provide design services?

Answer

Yes. We can work with your existing plans or assist with the design process, helping you develop a practical and attractive extension that suits your home and budget.

Question 7

What types of extensions do you build?

Answer

We construct: * Single-storey extensions * Double-storey extensions * Rear extensions * Side-return extensions * Wrap-around extensions * Kitchen extensions * Orangery-style extensions

Question 8

Will my extension match my existing house?

Answer

Absolutely. We carefully source matching bricks, roof tiles, and external finishes wherever possible to ensure the extension blends seamlessly with your property.

Question 9

Do you handle the entire project?

Answer

Yes. We offer complete project management, including groundworks, structural work, roofing, plumbing, electrics, plastering, and finishing trades.

Question 10

Can you install bi-fold or French doors?

Answer

Yes. We regularly install bi-folding doors, French doors, sliding patio doors, roof lanterns, and rooflights

Question 11

Why are proper foundations so important?

Answer

Foundations support the entire structure and transfer the building’s load safely into the ground. Correctly designed and installed foundations are essential for the long-term stability and safety of your property.

Question 12

How deep do foundations need to be?

Answer

Foundation depth varies depending on ground conditions, nearby trees, drainage runs, and Building Control requirements. Typical domestic foundations are often between 900mm and 1.5m deep, but each project is assessed individually.

Question 13

Do you carry out site investigations before starting?

Answer

Yes. We assess ground conditions during excavation and work closely with Building Control to ensure foundations are suitable for the proposed structure.

Question 14

What types of foundations do you install?

Answer

We install a range of foundation systems including: * Traditional strip foundations * Trench-fill foundations * Reinforced concrete foundations * Raft foundations * Foundations for garden rooms and outbuildings

Question 15

What happens if poor ground conditions are discovered?

Answer

If unexpected ground conditions are found, we will discuss the options with you and work with Building Control and structural engineers to determine the most suitable solution before proceeding.

Question 16

Do I need Building Control approval for foundations?

Answer

Yes. Building Control inspections are required at key stages, including foundation excavations before concrete is poured.

Question 17

Can you carry out all excavation work?

Answer

Yes. We undertake all excavation and site preparation works using appropriate machinery and experienced operators.

Question 18

Do you install drainage systems?

Answer

Yes. We install foul and surface water drainage systems, soakaways, inspection chambers, land drains, and drainage connections in accordance with current regulations.

Question 19

What is a soakaway and do I need one?

Answer

A soakaway allows rainwater to drain naturally into the ground rather than entering the main drainage system. Whether one is required depends on your site’s drainage arrangements and local regulations.

Question 20

Can you remove existing structures before starting groundworks?

Answer

Yes. We can safely demolish garages, conservatories, patios, sheds, walls, and other structures as part of the site preparation process.

Question 21

What types of refurbishment projects do you undertake?

Answer

We carry out a wide range of refurbishment and renovation works, including full property renovations, kitchen and bathroom upgrades, structural alterations, internal reconfigurations, flooring, plastering, decorating, and complete property modernisation.

Question 22

Can you renovate older properties?

Answer

Yes. We have experience working on period and older properties, carefully balancing modern building standards with the character and features of the existing home.

Question 23

Do you offer complete property refurbishments?

Answer

Absolutely. Whether you’re updating a single room or renovating an entire property, we can manage the project from start to finish.

Question 24

Can you remove internal walls?

Answer

Yes. We can remove non-load-bearing walls and, where required, install structural steelwork to create larger open-plan living spaces. Structural calculations and Building Control approval can be arranged where necessary.

Question 25

Do I need planning permission for a refurbishment?

Answer

Most internal refurbishment projects do not require planning permission. However, listed buildings and certain structural alterations may require approvals. We can advise on your specific project.

Question 26

Can I live in my home during the refurbishment?

Answer

In many cases, yes. We work closely with homeowners to minimise disruption and keep the property safe and functional wherever possible.

Question 27

Do you install new kitchens and bathrooms?

Answer

Yes. We provide complete kitchen and bathroom refurbishment services, including plumbing, electrics, tiling, flooring, and finishing works.

Question 28

Can you upgrade insulation and energy efficiency?

Answer

Yes. We can improve insulation, upgrade windows and doors, enhance ventilation, and recommend energy-efficient solutions to help reduce running costs.

Question 29

Can you repair damage caused by water leaks or structural issues?

Answer

Yes. We regularly carry out remedial works following water damage, structural movement, ageing, or general wear and tear.

Question 30

Do you manage all trades involved in the refurbishment?

Answer

Yes. We coordinate all aspects of the project, ensuring each stage runs smoothly and to schedule.

SipConConstruction & Building ServicesBuilding Quality. Creating Space. Delivering Excellence.

Extensions • New Builds • Garden Rooms • Groundworks • Refurbishments

Extensions

Transform Your Home With a Bespoke Extension.

Garden Rooms

Create Additional Space Without Moving

New Builds

Building Your Vision From The Ground Up

Groundworks

Strong Foundations For Every Project

Refurbishment & Renovations

Bringing Existing Properties Back To Life

FAQ

House Extensions