Home Extensions
A well-designed extension can completely change the way you live. If you are looking for a larger kitchen, extra living space or a more open plan layout, we help you extend your home in a way that feels natural and adds real value.
Different Types of Home Extensions
All extensions are delivered in line with client and architect specifications, with full compliance to building regulations and the highest safety standards.
Single-Storey Extensions
A single storey extension transforms your home by adding bright, functional space tailored to the way you live.
Double-Storey Extensions
Double-storey extensions designed to add significant space, improve functionality, and seamlessly enhance your home.
Side, Rear & Wrap-Around Extensions
Side, rear, and wrap-around extensions designed to expand your home, improve layout, and create bright, spacious living areas.
Open-Plan Conversions
Open-plan conversions designed to create bright, spacious living areas with improved flow and modern functionality.
What a Single Storey Extension Brings to Your Home
A single storey extension transforms your home by adding bright, functional space tailored to the way you live. It’s a cost effective way to expand without the disruption of moving, giving you room to grow while increasing the value and comfort of your property.
More space that works for you
Whether you want an open plan kitchen, a larger living area, a home office, or a playroom, the layout is designed around your lifestyle.
A seamless match to your existing home
Thoughtful design, quality materials, and expert craftsmanship ensure the new space blends naturally with your property’s character.
Light filled, modern living
Options like skylights, bi fold doors, and large windows create bright, airy rooms that connect beautifully with your garden.
Energy efficient construction
Built with modern insulation and high performance materials to keep your home warm, quiet, and efficient year round.
Added value
A well designed extension can significantly increase your home’s market appeal and long term value.
Latest Residential & Commercial Projects
Take a look at some of our most recent residential and commercial projects.
How We Work
1 | Initial Visit & Conversation
The first step we take after enquiry about a home extension is an initial project consultation focused on understanding what you want to achieve and whether the extension is feasible.
This stage usually covers:
- Project goals — the type of extension being considered (rear, side, wrap around, two storey) and how you would like to use the new space.
- Existing property details — layout, structure, access, and any known issues that could affect design or construction.
- Budget and timescale — an early check to ensure the proposed extension aligns with what you can invest and when you need the work completed.
- Planning and regulatory considerations — whether the extension is likely to need planning permission, fall under permitted development, or require structural calculations and building control approval.
- Next steps — we typically arranging a site visit to take measurements, assess the property in person, and begin preparing an outline design or estimate.
This first process sets expectations clearly and ensures that we can give accurate guidance before moving into detailed design, pricing, and planning stages.
2 | Design & Planning
The design and planning stage shapes how the extension will look, feel, and function, and it sets the foundation for a smooth build. It turns early ideas into a clear, workable plan that meets regulations, fits your home, and reflects how you want to use the new space.
What happens during design and planning
- Understanding how you live — The process starts with a conversation about how you use your home now and what you want to improve. This defines the purpose of the extension and the features that matter most.
- Surveying the property — Accurate measurements, structural checks, and an assessment of access, drainage, and boundaries ensure the design is realistic and compliant.
- Developing the layout — Floor plans and elevations, show how the new space connects to the existing house, how light will flow, and how movement will work day to day.
- Refining materials and style — Choices for windows, doors, roof type, finishes, and energy efficient features are explored to create a cohesive look that blends with your home.
- Planning permission and building regulations — Guidance is provided on whether the project falls under permitted development or requires a full planning application. All drawings and documents needed for approval are prepared and submitted.
- Budget clarity — Early design decisions are aligned with your budget, helping avoid surprises later and ensuring the project stays financially realistic.
Why this stage matters
A well planned design reduces delays, prevents costly changes during construction, and ensures the finished extension feels intentional, practical, and beautifully integrated with your home.
3 | Construction
Construction begins once the design, permissions, and technical details are fully in place, turning the plans into a physical structure. This stage focuses on preparing the site, establishing the foundations, and setting up the framework that will support the entire extension.
What happens at the start of construction
- Site preparation and setup — The area is cleared, access routes are organised, and protective measures are put in place to keep the rest of your home safe and clean throughout the build.
- Groundworks and foundations — The ground is excavated, drainage is assessed or adjusted, and the foundations are poured. This ensures the extension is structurally sound and built to last.
- Setting out the build — Precise measurements are marked out on site so the walls, openings, and roofline align perfectly with the approved plans.
- Initial structural work — Brickwork or blockwork begins, and the base structure starts to take shape. If steel beams or supports are required, they are scheduled early to integrate smoothly with the existing building.
- Coordination with your home — Any necessary openings between the old and new spaces are planned carefully to minimise disruption, often leaving this step until the extension is weather tight.
Why this stage matters
A well managed start ensures the build progresses efficiently, safely, and accurately. Strong foundations and precise early work reduce the risk of delays later and set the tone for a high quality finish.
4 | Finishing Touches & Completion
Finishing touches and completion bring the extension from a functional structure to a polished, comfortable living space. This stage focuses on detail, quality, and ensuring every element works exactly as intended.
What happens during finishing and completion
- Internal finishes — Plastering, painting, flooring, and joinery are completed with precision. This is where the space gains its character and begins to feel like part of your home.
- Electrical and plumbing completion — Fixtures, sockets, lighting, radiators, and any appliances are installed, tested, and certified to meet safety standards.
- Kitchen or bespoke fittings — If the extension includes a kitchen, utility area, or custom storage, units and worktops are fitted and aligned with the final design.
- Doors, windows, and glazing — Final adjustments ensure smooth operation, proper sealing, and maximum energy efficiency.
- Exterior finishing — Brickwork, rendering, roofing details, gutters, and external lighting are completed so the extension blends seamlessly with the existing property.
- Snagging and quality checks — A thorough inspection identifies any small adjustments needed. These are resolved before handover to ensure a flawless finish.
- Final clean and handover — The space is cleaned, cleared, and presented ready for use. All certificates, warranties, and documentation are provided.
Why this stage matters
Finishing and completion ensure the extension not only looks exceptional but performs reliably for years to come. It’s the point where the project transitions from construction to a fully realised, ready to enjoy part of your home.
Why Choose KBI for Your Home Extension
We handle everything from initial design and planning to construction and finishing touches, ensuring a smooth, stress free experience. Every project is delivered with precision, transparency, and a commitment to exceptional quality.
Over 40 years of building expertise
Ongoing communication throughout the project
High-quality materials and workmanship
Friendly, respectful tradespeople
Why Choose KBI for Your Home Extension
We handle everything from initial design and planning to construction and finishing touches, ensuring a smooth, stress free experience. Every project is delivered with precision, transparency, and a commitment to exceptional quality.
Over 40 years of building expertise
Ongoing communication throughout the project
High-quality materials and workmanship
Friendly, respectful tradespeople
Ready to get started?
Get in touch with us today to discuss your project and see how we can help.
info@kbiprojects.co.uk
Call
02037 736 366
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