The Design & Build Specialists

Are you looking for the best design and build company in London?

Get in touch now for a free quote!

Trusted by HUNDREDS of happy clients

Over the years, we’ve earned the trust of hundreds of homeowners and businesses by consistently exceeding expectations with our custom design and construction solutions

"Nothing is too much trouble for the team and they are quick to respond to all queries. I look forward to working with them on future projects."

Liam Whitfield

"Sparrow Design and Build is our go-to for both architectural services and structural engineering needs. We wholeheartedly recommend their services"

Marius Pugna

Our Premium Build And Design Services

Construction

Need reliable construction services? From planning to building, we ensure safety and quality in every project we deliver.

House Extensions

Looking to extend your home? Our expert team delivers high-quality house extensions, tailored to your needs.

Loft Conversions

Maximize your space with a loft conversion! Our team delivers quality craftsmanship tailored to your home.

Structural Engineering

Need expert structural engineering? We provide safe, innovative solutions for residential and commercial projects.

Architectural
Services

Elevate your space with our architectural services! We design functional, stunning spaces tailored to your needs.

New Build
Projects

Start your dream home with our new build services! We deliver quality, custom-designed projects from start to finish.

Complete Design & Build Solutions

Here at SDB we offer a comprehensive turnkey solution.

We enable you to avoid wasting precious time and the stress of coordinating between various consultants and subcontractors.

We aim to provide a hassle-free process with one point of contact throughout your build journey.

Our D&B steps are as follows:

Pre-Construction

As detailed above, we’re able to take you from a conceptual stage to be in a position ready for building by going through the Planning, Building Regulations and Structural Engineering elements of work.

Quotation

Once all design drawings are complete and the scope of works have been defined, we provide a clear breakdown of costs along with a payment schedule and project programme with key milestones. We give clients the opportunity to negotiate and tailor the quotation to their budgets. Upon agreement, we will sign a written contract and establish a start date for works.

The Build

A site manager will be present on site daily ensuring a safe worksite and ensuring work is undertaken at the highest quality. We only sub-contract for specialist activities and endeavour to undertake all works in-house. We will set up means of communicating with our clients (WhatsApp groups, emails, weekly reports etc.) with regular site meetings planned to review progress. Towards the end of the project, we ensure your satisfaction by undertaking snagging inspections until your desired outcome is met.

Completion

We allow a retention payment to be kept by our clients for an agreed defect period (usually three months). All warranties and guarantees are provided.

What Makes Our London Design And Build Service Different?

Our design and build service handles everything under one roof, from the initial concept to the final construction.

This means fewer headaches for you—no more juggling multiple contractors or worrying about miscommunication.

We ensure that everything runs smoothly, with constant updates along the way, so you always know what’s happening with your project.

One of the biggest advantages of combining design and construction is the cost savings.

By working as one team, we can spot potential issues early and resolve them before they become costly problems. This allows us to keep your project on track and within budget.

Plus, we have trusted supplier relationships that help us get the best materials at the best prices, giving you top-quality results whilst minimising the price tag.

We believe that your home should be as unique as you are. We take the time to really get to know your needs, tastes, and how you live your life.

Whether you’re after a modern open-plan space or a cosy family home, we’ll work with you to create a design that fits your style and your daily routine.

Our process is all about collaboration—you’re in control every step of the way, and we’ll make sure the final result is exactly what you envisioned.

We don’t cut corners when it comes to quality. Our team of experienced builders takes pride in their work, ensuring that every detail is completed to the highest standard.

We only use quality materials and ensure that our construction techniques meet the strictest industry standards.

We believe in building homes that stand the test of time, and we’ll never settle for less than excellent craftsmanship.

 

Being based in London means we know the city inside out. We understand the local regulations and know how to navigate the planning process, so there are no unnecessary delays.

Our team is also familiar with the architectural styles and trends that work best in London’s unique neighbourhoods.

This local knowledge ensures that your project not only complies with all regulations but also fits seamlessly into its surroundings, adding value and appeal to your property.

 

We care about the environment, and we know many of our clients do too.

That’s why we take a sustainable approach to every project. From using eco-friendly materials to designing energy-efficient homes, we’re committed to reducing our environmental footprint.

Whether it’s recycling construction waste or integrating energy-saving features into your design, we’ll help you create a home that’s better for both you and the planet.

At the heart of our service is a commitment to putting you, the client, first.

We’re here to listen, to understand your vision, and to bring it to life.

Throughout the project, we make sure you’re involved in the decisions and kept in the loop on progress.

Whether it’s answering your questions, providing updates, or making adjustments based on your feedback, our goal is to ensure that you’re happy every step of the way.

We’re proud of the reputation we’ve built over the years.

With numerous successful projects completed, we’ve earned the trust of homeowners and businesses alike.

Our portfolio speaks for itself, showcasing our dedication to delivering on time, on budget, and beyond expectations.

Many of our clients come back to us for future projects or refer us to others, which we believe is the best testament to the quality of our work.

Our Core Values

Relationships

Client satisfaction is key to our success and we do all we can to ensure your brief is met as well as your architectural desires by establishing an honest and transparent client-consultant relationship for the duration of the project. In addition to this, we aim to build relationships with the best subcontractors in the field to produce the highest quality finishes.

Professionalism

We are an enthusiastic and dedicated team willing to display and share our extensive industry practice with you. Having worked to the highest standards required on infrastructure projects, we hope to bring the same level of professionalism and coordination to your home or development.

Design Merit

We take pride in providing intricate and bespoke design solutions to help our clients achieve their desired outcome. We try and add value to our client’s spaces by introducing methods and techniques not commonly used in the private residential market.

Value Efficiency

We ensure all the structural elements being introduced to your project are being utilised at a value-engineered efficiency of around 80%. This means we do not over-engineer our solutions, a common trend in residential structural packages often resulting in architectural discrepancies and fluctuated build costs.

Buildability

We want your chosen contractor, whether it be SDB or another, to be at ease with our designs and drawings. Where possible, we will introduce structural solutions to aid the contractor in translating what’s on the drawing, to real life.

Swift Delivery

We aim to meet your project deadlines by producing designs in short timescales. We offer an express service to clients who require designs in a short turnaround.

Did you know?

Home improvements that increase floor space, like extensions or loft conversions, can boost a property’s value by up to 25%.

Interesting Facts about the London Property Market

  • The average house price in London in October 2024 was £519,579.

  • Rent prices in London are among the highest in the UK. Average monthly rents can exceed £2,500 for a two-bedroom apartment in central areas.

  • Properties in well-connected areas tend to attract higher prices due to easier access to central London and key business districts.

  • The introduction of the Elizabeth Line has increased property values in areas along the new route.

  • Between January to March 2023 planning authorities in London received 16,000 applications for planning permission.

  • The average cost of a house extension in London typically ranges from £1,500 to £3,000 per square metre.

  • The average cost of a loft conversion in London typically ranges from £40,000 to £80,000+.

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More Reviews From Our Happy Clients

Fez
"Great end to end service provided during my project, the team are very responsive and also helpful in helping unravel the tricky processes of architectural planning, seeking planning permission and working with third parties. Great working with you, and thank you for making the process smooth and transparent."
Mahir
"A reliable company providing sound advice needed for the work that needs to be done. There are many contractors out there, however, the benefit is having a structural engineer on board that can guide a project into being the best it can be. Working with budget helped us have peace of mind."
Garden Renovation
"Sparrow Design and Build are a very reliable company which I would recommend to all. Having used them a number of times they have surveyed a house for me, carried out structural calculations for steal beam installation and more recently renovated my garden. Excellent quality of work and good value. I look forward to working with them on future projects."
Ali
"We have been working alongside SDB for a number of years now and have found them to be one of the most professional and organised contractors we have worked with. They give their clients the assurance they need whilst works are taking place. In addition to this, their worksites are always left very clean in order for us to carry out our works. We look forward to working with SDB on future projects."