DESIGN & BUILD HOUSE EXTENSION COMPANY

We are Design & Build home and kitchen extension company in London specialising in Rear, Side Return, Wrap Around extensions. Our thorough tailor-made service combines planning, design stage through full completion.

KITCHEN & HOUSE EXTENSIONS COMPANY LONDON

Design & Build LONDON is London’s leading side infill, rear and wrap around kitchen extension company. We  successfully completed bespoke house extension projects to achieve extra space and breathe new life in to your home in London; Our thorough tailor-made service combines planning, Architectural design stage through full construction. 

We will help you PLAN, DESIGN and BUILD your house extension project!

WHAT WE DO

Concept

Capturing your vision

We apply innovative architectural design solutions to building projects to develop a concept design, sketching layout of your house extension and options to explore the potential of the property. We are prepared to spend as long as you require on this process, to ensure that all issues and alternatives are considered.

Design

Bringing your ideas to life

Our creative Architectural & Interior designers will begin producing concept designs and sketches. This is a collaborative process where we work closely with you to develop ideas into a final set of plans for the kitchen extension build phase. You can also hand-pick materials, fixtures and fittings with guidance from our experts.

Build

Construction and sign-off

You can look forward to the final result as the build teams begin construction under the orchestration of your personal Project Manager. The detailed program will ensure that the right people, tools and materials will be on-site at the right times for a seamless build.

Contact Us

Meet With Us

At the early stages of enquiry about your house extension project, most questions we receive are about feasibility and cost. We respond to this need by booking a free design consultation with a member of our Architectural Team. This consultation typically takes around 20- 30mins and following the meeting we will send you a tailored, fixed fee Design Proposal, along with an outline quotation for the works. If you prefer, we can also arrange a site visit to your home, and with our Premium visit the fee is refundable in full should you instruct us within 30 days of the visit.

Free Consultation

What’s included?

  • Discussion about the project brief,
  • Design fee proposal
  • Build Quotation (Ballpark figure or detailed quotation)
Book now

Architectural Design – £125+VAT

What’s included?

  • Discussion about the project brief,
  • Design fee proposal
  • Build Quotation (Ballpark figure or detailed quotation)
  • On site survey of proposed floor area
  • Cost advice and optimising your budget
  • Specialist planning advice
  • Party Wall advice and guidance

*£125 + VAT fully refundable within 30 days on Design instruction

Book now

Concept – £200+VAT

What’s included?

  • Discussion about the project brief,
  • Design fee proposal
  • Build Quotation (Ballpark figure or detailed quotation)
  • On site survey of proposed floor area
  • Cost advice and optimising your budget
  • Specialist planning advice
  • Party Wall advice and guidance
  • Creative design ideas
  • Follow up meeting & plans

*£200 + VAT fully refundable within 30 days on Design instruction

Book now

PORTFOLIO

Take a look at some of home extensions

Contemporary Home Extension – Ealing

Home Renovation – Primrose Hill, NW3

Loft Conversion – Pimlico, SW1V

Loft Conversion & Extension – Fulham SW6

Side Infill Extension – Fulham, SW6

Contemporary Renovation – Battersea, SW11

Architectural Design Bundles

Whether you need some planning feasibility advice or a full Building Control drawing set, we offer a variety of Design Packages which can be adapted to suit you. You can commit to everything from the very beginning, or build your package as you go.

Pre-Planning Advice
Explore feasibility options via your local council

What’s included?

  • Expert advice on planning
  • Drawings and design development
  • Preparation in advance of attending the Pre-planning Application meeting

Ground Floor Extension – £795

Ground Floor Extension & Loft Conversion – from £995

Loft Conversion – from £895

Ground Floor & First Floor Extension – from £995

Something Else? Contact us for a quote

BOOK NOW

Design & Planning
Finalise your design and obtain planning consent

What’s included?

  • Discussion about the project brief
  • Drawing amendments
  • Planning advice and submission of application
  • Cost advice and optimising your budget
  • Party Wall advice and guidance

Ground Floor Extension – from £1,595

Ground Floor Extension & Loft Conversion – from £1,995

Loft Conversion – from £1,595

Ground Floor & First Floor Extension – from £1,995

Something Else? Contact us for a quote

BOOK NOW

Ready to Build
Get ready to build with planning submission, building regs pack and full structural engineering.

What’s included?

  • Full measured survey
  • Drawing amendments
  • Planning advice and submission of application
  • Full Building Reg. Pack
  • Structural calculations
  • Detailed schedule of works
  • Party Wall advice and guidance
  • Creative design ideas
  • Follow up meeting & plans

Ground Floor Extension – from £3,995

Ground Floor Extension & Loft Conversion – from £4,995

Loft Conversion – from £3,495

Ground Floor & First Floor Extension – from £4,995

Something Else? Contact us for a quote

BOOK NOW
Kitchen and house extension company

Design & Build London is London’s leading house, kitchen and side return extension company. We design, manage and build a wide variety of bespoke extension projects; we offer services to extend your living space, with maybe a bigger kitchen, an extra bedroom, or simply a renovation to create more living space for your growing family. Whether it is with a rear home extension or a wrap-around kitchen extension, we will maximise the space in your home.

Design & Build London team can provide you with the extension in London that you desire, Our industry leading experience in quality builds is recognised throughout South West and Central London. Our in-house architectural designers and builders can not only enhance the beauty of your existing home – a quality rear extension will also add value to your property.

A home extension project within your budget will meet your need for extra living space, as well as enhancing the appearance of your home. Our home remodelling experts at Design & Build London are able to deliver a seamless transition from your property in London as it currently is, to the larger and more spacious home that you desire – and all within the contracted time frame, working with you throughout the process.

We would be happy to provide you with a free estimate, and then get started on your house extension – we are ready when you are!

Share your ideas with us, and we can make them become a reality.

Why us

A truly personal experience

Most architects and other companies which claim to be ‘design & build’ do not have the necessary in-house knowledge to accurately estimate the cost of a project until the initial design is complete. Usually, these companies rely on third party contractors to provide quotations which can result in budget creep, design amendments and delays. Our design & build process has been refined to deliver projects extremely efficiently with award winning results. Please feel free to contact us if you have a project in mind which you would like to discuss.

Get in touch
We are always happy to chat. Contact us to arrange an initial meeting or you can use our project enquiry form.

Full Name: (required)
Address and Postcode:
Your Email (required)
Telephone: (required)
Brief Description of your project

A truly personal experience

Our services designed to expand your space and built around your desired interaction with it. We will ensure to cover your aspirations, requirements and patterns of habitation.

Design Considerations

Roof Form

Flat? Pitched? Or a combination of both

Design Considerations

Windows Types

Openable? Fixed? Sliding or folding?

The Process

1.

Free, no-obligation site visit

This is the opportunity for us to get to know you, and to form a picture of your precise requirements. It is also the time for you to get answers to any questions you might have.

2.

Feasibility assessment

The next step will be for us to make a closer analysis of your proposed project. Our assessment will be informed with photographs and detailed measurements. We will also carefully consider any legal issues that might be involved, and, importantly, we will assess whether your proposed budget is realistic for the envisaged work.

3.

Concept Design

Our design team will turn your ideas and aspirations into an outstanding concept design, which meets all functional requirements, at a price you can afford.

4.

Planning drawings & consents

We will assess the Planning Permission requirements of your proposed project. If any permissions are required, then there is no need for you to worry, as we can take care of this aspect of the process on your behalf. We are confident of obtaining the necessary consent, given our record of having achieved acceptance of Planning Permission on the first application on 97% of occasions.

5.

Building regulations & engineering

As part of our service, we will make sure that all aspects of the build comply with all current Building Regulations. As with any required planning consent, we can manage the process of obtaining any necessary approvals from Building Control.

6.

Construction plans & specifications

Our building team works with complete precision, following construction plans to the last millimetre, and providing the fixtures & fittings and finishes that exactly match your expectations.

Working with DBL…

We are a London-based Design & Build company dedicated to achieving timeless, elegant designs through careful consideration of scale, form and proportion.

Design & Build London work with RIBA Chartered Architects. Who comply with the strict criteria of the Royal Institute of Chartered Architects, covering insurance, health and safety and quality-management systems.  We offer conception to completion, incorporating concept design, planning negotiation, statutory approvals, contractor procurement and management on site.

We are early adopters of the latest technology, we use innovative 3D design and visualisation tools as a standard for all projects. Our experience shows that real-time visualisations and virtual reality are extremely efficient tools for choosing finishes, fixtures and fittings, and simulating natural light.

Our friendly, experienced, highly skilled team can take you step-by-step through the challenge of designing your new space. We’ll collaborate closely with you from the initial drawings, detail design and planning through tender and construction to the successful completion of your project. On time and on budget.

Delivering High-Quality Projects on Brief, On Time and Within Budget. 

We offer a wide range of build and refurbishment services and enjoy working on different project types and sizes. We construct new buildings, alter, refurbish, and remodel existing buildings, undertake basement excavations, loft conversions, and extensions and transform interior spaces.

We guide you through each step of your project from design to completion, allowing you to be involved as much or as little as you want.

We guide you through each step of your project from design to completion, allowing you to be involved as much or as little as you want.

Net Promoter

93%

A standardised measurement of customer loyalty and the likelihood of a recommendation.

Client Retention

95%

of clients continue to use us for future construction or architecture projects.

Referrals

80%

of our work comes from word-of mouth recommendations alone.

HOW MUCH DOES AN HOUSE or KITCHEN EXTENSION COST TO BUILD?

Small Side Return Extension

Roof Form: Flat Roof

ESTIMATED BUILD COST: £55000

Small 3m x 3m Rear Extension

Roof Form: Flat Roof

ESTIMATED BUILD COST: £55000

Small Side Return Extension

Roof Form: Pitched Roof

ESTIMATED BUILD COST: £60000

Medium Rear Extension

Roof Form: Flat Roof

ESTIMATED BUILD COST: £70000

Medium Side Return Extension

Roof Form: Pitched Roof

ESTIMATED BUILD COST: £75000

Medium Side Return Extension

Roof Form: Flat Roof

ESTIMATED BUILD COST: £70000

Large Rear Extension

Roof Form: Pitched

ESTIMATED BUILD COST: £75000

Large Side Return Extension

Roof Form: Pitched

ESTIMATED BUILD COST: £85000

Large Side Return Extension

Roof Form: Flat

ESTIMATED BUILD COST: £85000

Small Wrap Around Extension

Roof Form: Pitched, Flat, Gable, Crown

ESTIMATED BUILD COST: £80000

Large Wrap Around Extension

Roof Form: Pitched, Flat, Gable, Crown

ESTIMATED BUILD COST: £105000

Medium Wrap Around Extension

Roof Form: Pitched, Flat, Gable, Crown

ESTIMATED BUILD COST: £95000

Net Promoter

93%

A standardised measurement of customer loyalty and the likelihood of a recommendation.

Client Retention

95%

of clients continue to use us for future construction or architecture projects.

Referrals

80%

of our work comes from word-of mouth recommendations alone.

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Get in touch
We are always happy to chat. Contact us to arrange an initial meeting or you can use our project enquiry form.

Full Name: (required)
Address and Postcode:
Your Email (required)
Telephone: (required)
Brief Description of your project

Interior Design
  • Interior Design service for your home
  • Advising on styles, materials, feasibility
  • Producing detailed plans and 3D images
  • Fittings, furnishings, colours and lighting
  • Maximising best features of your property
Design & Build
  • Project Concept, Design and Planning
  • Preparing schedules of work, finishes & timelines
  • Design and Build team under one roof
  • Problem-solving and troubleshooting
Construction Services
  • Full House Renovation, Kitchen Renovation
  • House Extensions, Lofts, Basements
  • Structural & Architectural glass
  • Traditional, steel or concrete frame
  • Stone fitting of slab and tiles

Design & Build London
126 New Kings Road,
Fulham,
SW6 4LZ