House extensions
Services
Extend your home with a bespoke design that adds space, comfort, and value — all tailored to your lifestyle.
Why Choose a House Extension?
Running out of space but love your home? A house extension is the perfect way to expand your living area and enhance the way you live — without the stress of moving.
We specialise in single-storey, double-storey, side, rear, and wrap-around extensions, designed to blend seamlessly with your home’s existing structure and style. From concept and planning to construction and finishing, we manage every step — ensuring your new space is built with precision, care, and long-term durability.
Adding an extension is one of the most effective ways to improve both your home’s functionality and its market value. Here’s why homeowners choose this investment:
- Create open-plan kitchens, extra bedrooms, or family rooms without needing to move.
- A well-designed extension can increase your home’s resale value by up to 25%.
- Smart designs maximise light and flow, improving how your home feels and functions.
- More affordable and rewarding than the costs of moving to a larger property.
- Extensions built to complement your existing home architecture perfectly.
Conversions, built to last
Why homeowners choose us?
Full design & planning service
We produce measured surveys, 3D concept plans and handle planning or permitted development paperwork where required.
Turnkey build
Structural work, roofing, insulation, electrics, plumbing and finishes — managed by our experienced project managers.
Transparent pricing & guarantees
Clear fixed quotes, milestone payments and a warranty on structural works.
Local, reliable craftsmen
Our craftsmen take pride in every detail — delivering high-quality workmanship, honest communication, and results you can trust.
Free survey & brief
We visit, measure and confirm feasibility.
Design & estimate
Concept drawings, layout options and a fixed price.
Approvals & structural design
Building regs drawings and any required planning.
Build & project management
Site set-up, structural works, roofing, windows, insulation and finishes.
Handover & guarantee
Snagging, client walkthrough and warranty documentation.
Recent projects
Gallery
Take a look at some of our recent projects to see the quality of our work and the transformations we’ve achieved for our clients.
FAQ's
Questions our clients ask
Have questions about how our process works, what to expect, or how to get started? We’ve answered some of the most common queries below to help you plan your project with confidence.
Contact UsDo I need planning permission for a house extension?
Many home extensions can be built under permitted development rights, depending on size and location. We’ll advise you on any permissions or approvals required before work begins.
How long does a typical house extension take?
Most single-storey extensions take 8–12 weeks to complete, while larger or double-storey projects may take longer. We’ll provide a detailed schedule before starting.
Will an extension add value to my home?
Absolutely — high-quality extensions are among the best home investments, often increasing property value by 15–25%.
Can I stay in my home during the build?
In most cases, yes. We work carefully to minimise disruption, keeping your home safe and accessible throughout the project.
How much does a house extension cost?
The cost varies based on size, materials, and design. We provide a clear, fixed-price quote after your free consultation — no hidden fees.
What our clients say
Customer reviews
Don't just take our word for it - hear from our satisfied customers
reviewed on
26 reviews
This was the second time we worked with ICS, having completed a loft conversion with them in 2023. This time they built our kitchen extension and once again the quality of their work was extremely high. Would not hesitate to recommend ICS or to work with them again.
Ella Kahn
London
We have been really very happy with ICS. The company provided a reasonable quote, detailed information on the process and was very responsive to queries. They provided an online portal which helped us to track stages of the build itself as well as finance.
Michael Thompson
London
ICS were such a good choice. Absolutely professional and meticulously honest from start to finish. Site manager Stas was always available to smoothly handle any issues that arose. Builders all friendly and competent. Happy with our experience and our new loft.
Adam Rasmussen
London
I had the pleasure of working with ICS for a series of projects on my property (SE6), including a sideways rear extension, bathroom refit, the addition of a laundry room, complete replumbing, and the removal of an old chimney. The entire crew was not only skilled but also friendly and punctual.
George Randerson
London
We recently had ICSolutions complete a loft conversion, adding two spacious bedrooms and a shower room. From start to finish, the experience was excellent. The team was professional, respectful, and a pleasure to work with. They were always prompt with their timing and kept us well-informed.
Fatima Ali
London
We just finished a loft conversion with ICS, and I can’t say enough good things about them. They were absolutely amazing from start to finish! Stas, the project manager, was fantastic – completely on top of everything and led the project with such competence and attention to detail.
Natasha
London
Ready to work together?
Let’s bring your vision to life
Whether you’re planning a loft conversion, extension, or full renovation, our expert team is here to make it happen — on time, on budget, and with exceptional quality.
