How much does a bespoke hardwood kitchen extension cost?

Pricing depends on the footprint, timber specification, glazing performance, and the extent of structural work required to open the host building. Each project is tailored to the existing property's masonry and layout, so costs vary. We provide clear, itemized estimates following an initial site assessment and design brief.

Do I need planning permission for a hardwood kitchen extension?

Many single-storey rear extensions fall under Permitted Development, provided they meet strict criteria regarding ridge height, depth, and boundary proximity. However, if your property is listed, in a Conservation Area, or within an Area of Outstanding Natural Beauty (AONB), formal planning permission or Listed Building Consent is usually necessary. We manage all site surveys, architectural drawings, and planning submissions.

Does a timber kitchen extension need building regulations approval?

Yes. Removing exterior walls to create an open-plan kitchen and dining layout requires full Building Regulations compliance. This covers structural steel calculations, thermal insulation (U-values), ventilation, fire safety, and electrical installation.

What is the difference between a hardwood kitchen extension, a conservatory, and a brick extension?

A conservatory features a fully glazed roof, offering limited solid wall space for cabinetry. A traditional brick extension provides solid walls but relies entirely on standard vertical windows for natural light. A hardwood kitchen extension combines solid masonry or timber piers with insulated roof perimeters and glass lanterns, providing the necessary wall space for kitchen units and high-span openings while maximizing overhead daylight.

Can a hardwood kitchen extension be used comfortably all year round?

Yes. We engineer our extensions with high-density Sapele timber frames, insulated roof structures, and high-performance solar-control double glazing (incorporating Low-E coatings, argon gas, and warm-edge spacers). This combination prevents cold spots in winter and limits excess heat gain during summer.

Can I knock through and open my existing kitchen into a new hardwood extension?

Yes. Expanding ground-floor layouts to unify cooking, dining, and living areas is the primary goal for most of our clients. We design the timber framework alongside structural steelwork to safely remove existing external load-bearing walls, creating a clean, seamless transition between the original house and the new space.

Kitchen Extensions

James Alexander Garden Rooms designs, handcrafts, and installs bespoke hardwood kitchen extensions across the South of England (including Somerset, Dorset, Devon, and the Cotswolds). Using sustainably sourced, high-density Sapele timber, solar-control double glazing, and custom structural steelwork, we open up dark, segmented ground floors into bright, fully insulated, year-round kitchen, dining, and living hubs tailored to your home's character and planning requirements.
Kitchen Extensions

James Alexander Garden Rooms designs, handcrafts, and installs bespoke hardwood kitchen extensions across the South of England (including Somerset, Dorset, Devon, and the Cotswolds). Using sustainably sourced, high-density Sapele timber, solar-control double glazing, and custom structural steelwork, we open up dark, segmented ground floors into bright, fully insulated, year-round kitchen, dining, and living hubs tailored to your home's character and planning requirements.

HardwoodKitchen Extensions

The Heart of Your Home, Beautifully Reimagined

Custom-designed glass kitchen extensions and kitchen conservatories that transform the way your family lives. More light, more space and more room to breathe, whether that means a generous open-plan kitchen diner, a seamless indoor-outdoor living space or simply a kitchen that finally works the way your family does. Whatever you're imagining, we'll design it around you and build it to last.

GALLERY

Previous Kitchen Extension Projects

The Heart of Your Home: Our Partnership with Terence Ball Kitchens

A James Alexander kitchen extension is more than just an architectural addition; it’s a space designed for living. To ensure the interior matches the handcrafted quality of our timber frames, we are proud to work alongside our Somerset neighbours, Terence Ball Kitchens.

As a fellow family-run business with over 60 years of heritage in master cabinet making, Terence Ball shares our "built to last" philosophy. This relationship allows us to offer a seamless, end-to-end service where the design of your new oak or timber extension and your bespoke kitchen are developed in perfect harmony. From the first structural sketch to the final cabinet handle, we work together to create a space that is as functional as it is beautiful.

A terence ball kitchen with a james alexander garden room extension

Bright kitchen with large windows overlooking a snowy outdoor scene, featuring a kitchen island with a sink, a dining table with chairs, and a chandelier hanging from a skylight ceiling.

The heart of your home

The modern family kitchen is no longer just a place to cook. It's where the day starts, where homework gets done, where friends gather and where memories are made. It's the room that works hardest in your home and it deserves to be designed that way.

A James Alexander glass kitchen extension takes what you have and transforms it entirely. Cramped layouts become generous open-plan spaces. Dark corners give way to natural light. And a room you squeezed into becomes a room you never want to leave.

a light and airy Terence ball kitchen with a James Alexander lantern filling the room with light

Open-Plan Living, Designed Around Your Family

One of the things we love most about kitchen extensions is the opportunity they create, even in the most challenging spaces. We regularly transform:

Side returns; making use of narrow unused passages alongside the house
Shaded corners; brought to life with roof lanterns and full-height glazing
Lower ground floor spaces; opened up with wide French doors and considered light planning
Existing kitchen footprints; extended outward to create genuine indoor/outdoor living

We can also incorporate extractor fans directly into a solid roof keeping the space cool and completely free from cooking odours without compromising the design.

View of a backyard with an outdoor dining area, stone paving, and a building with a glass roof extension, fully open to reveal an interior kitchen and dining space.

Finding the Right Design Approach for Your Home

No two homes are the same, and no two kitchen extensions should be either. We work across three broad design approaches:

Contrasting style; a bold, contemporary extension built alongside an older home, confidently marking the difference between original and new.
Harmonising style; a modern extension or conservatory designed to sit naturally alongside a period property, using traditional materials like brick and timber to create a unified, considered look.
Feature-led design; using the extension to frame and celebrate the original architectural features of your home, such as exposed brick walls or original ceiling beams.

Our designers will help you find the approach that feels right for your home and then make it a reality.

HONEST FEEDBACK

Client Reviews

My experience was of a professional well organised company. At all stages of the build we felt completely confident that everything was been managed thoroughly- a pleasure to deal with.

Alan and Wendy

‘Exceptional service. The garage was completed on time and looks amazing. The team were great and very respectful to both of us and our property’

Abi H.

‘Fantastic company to deal with, Very professional. Attention to detail is excellent. Lovely team of people. Would highly recommend’

J Hynard.

Our hardwood kitchen extensions are designed to combine timeless craftsmanship, natural light and practical everyday living. Below, we answer some of the most common questions homeowners ask when considering a bespoke hardwood kitchen extension.

Pricing depends on the footprint, timber specification, glazing performance, and the extent of structural work required to open the host building. Each project is tailored to the existing property’s masonry and layout, so costs vary. We provide clear, itemized estimates following an initial site assessment and design brief.
Many single-storey rear extensions fall under Permitted Development, provided they meet strict criteria regarding ridge height, depth, and boundary proximity. However, if your property is listed, in a Conservation Area, or within an Area of Outstanding Natural Beauty (AONB), formal planning permission or Listed Building Consent is usually necessary. We manage all site surveys, architectural drawings, and planning submissions.
Yes. Removing exterior walls to create an open-plan kitchen and dining layout requires full Building Regulations compliance. This covers structural steel calculations, thermal insulation (U-values), ventilation, fire safety, and electrical installation.
A conservatory features a fully glazed roof, offering limited solid wall space for cabinetry. A traditional brick extension provides solid walls but relies entirely on standard vertical windows for natural light. A hardwood kitchen extension combines solid masonry or timber piers with insulated roof perimeters and glass lanterns, providing the necessary wall space for kitchen units and high-span openings while maximizing overhead daylight.
Yes. We engineer our extensions with high-density Sapele timber frames, insulated roof structures, and high-performance solar-control double glazing (incorporating Low-E coatings, argon gas, and warm-edge spacers). This combination prevents cold spots in winter and limits excess heat gain during summer.
Yes. Expanding ground-floor layouts to unify cooking, dining, and living areas is the primary goal for most of our clients. We design the timber framework alongside structural steelwork to safely remove existing external load-bearing walls, creating a clean, seamless transition between the original house and the new space.

READY TO SEE WHAT’S POSSIBLE?

Contact Us Today

Whether you have a clear vision or you're just beginning to explore what's possible, we'd love to help. Every James Alexander kitchen extension starts with a conversation and we think you'll be surprised by what we can create together.

Fill in the form to Book a Free Design Consultation Or call us on 01823 762176