House Extensions In Dorking
How much does a house extension cost in Dorking? As a starting point, single-storey building work usually costs between £1,500 and £2,500 per square metre. A double-storey extension costs about 50% more for the same footprint, but you gain twice the floor area. Allow for VAT at 20% and set aside 10 to 15% as contingency, and you have a sensible working budget.
Lemon Tree Construction, a family-run builder from Frimley, plans and builds single-storey, double-storey, side and wraparound extensions in Dorking. Many families use the extra space for a larger kitchen or an extra bedroom, the two changes that tend to add most value. We also explain how the build is sequenced, so you know when each part of the house will be affected.
Dorking sits at the edge of the Surrey Hills National Landscape, and that setting is worth bearing in mind when designing an extension. For many homes, a single-storey rear extension can still be built under permitted development, up to 3 metres from the original rear wall on a semi or terraced house, or 4 metres on a detached house. Two-storey, side and wraparound extensions are more likely to need planning permission from Mole Valley District Council, and we take care of the application. If your plans are ambitious, we will tell you early what is realistic.
We are fully insured, FMB members and use responsibly sourced timber. From the first site visit to building regulations sign-off, one team looks after your Dorking extension.
Single-Storey Extensions
Create additional living space on one floor that seamlessly blends with your existing home, tailored to your design preferences.
Double-Storey Extensions
Create spacious, multi-level additions that provide extra living space, blending with your home’s design, increasing its value.
Wraparound Extensions
Combine side and rear extensions to create a spacious, versatile living area that maximises your home’s footprint.
Side and Rear Extentions
Extend both the side and the back of the property for a larger, more open floor plan or for adding extra rooms.
More Details
Single-Storey Extensions In Dorking

At Lemon Tree Construction, we specialise in designing and building single-storey extensions that provide you with additional living space tailored to your needs. Whether you're looking to expand your kitchen, create an open-plan living area, or add a new room to suit your growing family, our single-storey extensions are a cost-effective and efficient way to enhance your home.
We work closely with you to create a design that complements your existing property, ensuring the extension blends seamlessly with the original architecture. Our experienced team manages every aspect of the project, from obtaining planning permissions and approvals to construction and final finishes, ensuring a smooth and hassle-free process.
Single-storey extensions are an excellent option for homeowners looking to increase floor space without the complexity of multi-storey additions. At Lemon Tree Construction, we pride ourselves on delivering high-quality craftsmanship and creating functional, beautiful spaces that enhance your lifestyle and add long-term value to your property.
Double-Storey Extensions In Dorking

At Lemon Tree Construction, we specialise in double-storey extensions that provide significant additional living space by expanding both the ground and upper floors of your home. Whether you're looking to create a larger kitchen, add extra bedrooms, or increase the overall functionality of your home, a double-storey extension offers a versatile solution that maximises your property’s potential.
Our team works closely with you to design a personalised extension that seamlessly integrates with your existing architecture while meeting your specific needs and budget. From planning and obtaining necessary permits to construction and final finishing, we manage every aspect of the project to ensure a smooth and stress-free experience.
Double-storey extensions not only enhance the usability of your home but also increase its value, making it a smart investment for the future. At Lemon Tree Construction, we are committed to delivering high-quality craftsmanship and creating beautiful, functional spaces that improve your home's layout and your everyday living experience.
Wraparound Extensions In Dorking

At Lemon Tree Construction, we specialise in wraparound extensions that combine both side and rear extensions to create a significant increase in living space. This type of extension wraps around two sides of your property, providing a versatile and spacious addition that can transform the layout and functionality of your home.
A wraparound extension is ideal for homeowners looking to create an open-plan living area, expand their kitchen, add extra rooms, or simply maximise the potential of their property. Our team will work closely with you to design and build an extension that blends seamlessly with your existing home, ensuring it complements both the architecture and style of your property.
From planning and design to construction and finishing, we handle every detail, including obtaining necessary planning permissions and ensuring compliance with building regulations. With a focus on quality craftsmanship and tailored solutions, our wraparound extensions provide the extra space you need while adding long-term value to your home.
Side and Rear Extensions In Dorking

At Lemon Tree Construction, we specialise in side and rear extensions that provide the perfect solution for homeowners looking to maximise space without moving. Our side and rear extension services are designed to expand your home by extending both the side and rear of your property, creating a seamless transition between new and existing spaces.
Whether you want to extend your kitchen, create a larger living area, or add an extra bedroom, we work with you to design a customised solution that suits your needs, lifestyle, and budget. Our team handles every aspect of the project, from planning permissions and architectural design to construction and finishing, ensuring a smooth and stress-free experience.
Side and rear extensions not only offer increased living space but also allow for creative, open-plan layouts that enhance the flow of your home. With a focus on quality craftsmanship and attention to detail, Lemon Tree Construction ensures your extension blends beautifully with your existing home while adding value and functionality.
