Extension Builders in Mill Hill

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (15 reviews)

Easily find verified Mill Hill Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Mill Hill.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Mill Hill

3142 Results

Sort by:

G SINGH
Rating: 5 out of 5
Extension Builder in Mill Hill
G SINGH BUILD is your trusted partner for high-quality home improvement and building services. Specializing in carpentry, bathroom fitting, fencing, gutter installation, driveways, and a wide range of general building work, we bring skill, reliability, and craftsmanship to every project. Whether you're renovating your bathroom, upgrading outdoor spaces, or tackling a full home improvement job, G SINGH BUILD delivers durable, precise, and beautifully finished results—on time and on budget. We take pride in turning your vision into reality with a commitment to excellence and customer satisfaction.
Get in touch
Latest review:
Painting & Decorating- 26 Mar 2025
G singh gaves me an excellent job more than my expectation and helped me a lot as i dknt know much about construction work thanks G SINGH
Jd construction services London ltd
Rating: 5 out of 5
Extension Builder in Mill Hill
JD CONSTRUCTION SERVICES LONDON LTD offer a wide range of building services in London and surrounding areas. We are in the field from last ten years and our staff is highly skilled under the CITB CONSTRUCTION skilled.
Get in touch
Latest review:
Groundwork & Foundations- 29 Dec 2021
Jagmeet did a fantastic job. Listened to the brief. Was happy to change a few bits at my request and got the job done in record time between Xmas and new year. Would definitely use him again. Very reliable.
ADS Builders AL Ltd
Rating: 5 out of 5
Extension Builder in Mill Hill
Company Profile: We at ADS Builders AL Ltd are highly experienced professionals in the construction industry. ADS Builders AL Ltd quickly developed a reputation for delivering successful projects in complex health and education sectors. The company has grown steadily over the years, building an extensive client base. We pride ourselves on our teamwork culture, which enables us to establish long-term relationships with our clients and their professional teams. We operate from offices in London, managing projects for public and private sector clients across London and the South East. As a principal contractor our experience includes: • Refurbishment, Alteration and Extension • New Build • Design & Build • Two Stage Tenders • Fast Track Fit-Out • Office and Commercial • Heritage, Listed and Conservation ADS Builders AL Ltd is a company that specialises in refurbishment and new build projects, particularly in the residential and commercial sectors. With extensive experience in these fields, we offer a value-added approach and understanding of our clients’ requirements. We maintain strong relationships with a wide variety of tried and tested subcontractors. This strong supply chain enables us to provide flexibility, manage change and maintain quality. We are capable of handling tendered or negotiated projects valued between £100,000 to £20,000,000. Our financial strengths come from a commitment to reinvest, ensuring a sound financial base is maintained without external borrowings. We have a team of directly employed professional staff who deliver a cost- effective, timely, and high-quality construction solution. Our core team of tradesmen delivers consistent quality and has the ability to be flexible and reactive to requirements. Our long-lasting client partnerships are a testimony to the exemplary service we provide. This level of customer satisfaction, repeat and referred business forms the foundation of Logan’s success. Our approach is sensitive, innovative and bespoke, driven by challenging and constrictive working environments. We are committed to achieving the optimum solutions across our service delivery, considering logistical aspects to ensure customer satisfaction. ADS Builders AL LTD is a team of 13 skilled craftsmen with extensive experience in various fields, including plumbing and electrical, bricklaying, roofing, carpentry, tiling, painting, and plastering. We offer outstanding quality and a range of building services, including: Full property refurbishments Loft conversions Building extensions Fitted kitchens and bathrooms Demolition New build Basements and basement work. Initial Consultation Instruct Architect The company provides free estimates and has insurance and references available upon request. On our initial consultation at your property, we can do a Ist floor ana loft survey which will give us all the dimensions we need to give you a proposed loft floor plan before asking you to commit to a deposit. This would be given to you with your free no obligation quotation. Should you wish to accept our quotation and proceed, we will then instruct an architect to survey your house in order for architectural drawings to be drawn up for your loft conversion or extension. Certification We, unlike many companies always make sure that no work starts until you have the relevant certificates. We take pride in ALL of our work that we undertake and ensure that you as a customer are completely satisfied with what we have achieved. Get in touch with our team of specialists today
Get in touch
Latest review:
Windows & Doors (Wooden)- 4 Dec 2024
After giving me a good quote on some work replacing a rotten windowsill, Albert came two days later to do the work. He arrived on time (early in fact!), took care to cover the furniture, was polite, professional, knowledgeable, and got the job done quickly and efficiently, keeping me informed all the way, and cleaning up afterwards. I was really impressed with both the job and Albert, and will definitely be booking him again in the future!
AGDESIGN-BUILD.LTD
No reviews yet
Extension Builder in Mill Hill
Architectural services Structural Engineering Services
Get in touch
rr.construction
Rating: 5 out of 5
Extension Builder in Mill Hill
Working with: simfonia kitchens,howdens kitchens,ikea kitchens,wren,benchmarx,magnet,b&q kitchens,selco,wickes homebase.8 year experience of building in uk
Get in touch
Latest review:
Hard Flooring- 8 May 2019
I was very pleased with Igor’s work on the flooring and under floor heating, so decided to ask Raimundas to quote for a large bathroom, hallway, fitted kitchen, rewiring of all electrics and flooring throughout the rest of the flat. Due to work and my partner living overseas, I needed to trust somebody for a long length of time with my keys and my property. I was able to have a lot of the work done while not in the country, communicating with pictures, videos etc. Obviously this was important for me and made having the work done easier. There were also many problems with the kitchen delivery and other things that didn’t go according to plan. Raimundas was patient and polite at all times, even though it was sometimes rather frustrating. I highly recommend his services, and would definitely consider RR Construction for the next job
PAREKH VENTURES LTD
No reviews yet
Extension Builder in Mill Hill
Established in 1997, We ensure the long-term success of our business in the sustainable future by contributing economically, environmentally and socially to the communities in which we operate. We define our vision though our leaders who aim to be the best in the industry. Our business is built on our core values and ethos. Always striving to be the best, always committed and enthusiastic in all we do. Our main line of work is New Builds, Extension, Loft Conversions and Groundworks.
Get in touch
Primavera Construction LTD
No reviews yet
Extension Builder in Mill Hill
We specialize in domestic projects (inc. home extensions, loft conversions, refurbishments and new builds), delivering projects from design concept (Planning Stages) through to Construction and Turnkey Completion. CONSTRUCTION EXPERIENCE: 8 yrs working on complex £100M+ projects across London, 2 yrs working on new build £5M+ project in Chigwell, as well as many smaller domestic projects. PLANNING EXPERIENCE: 10+ yrs of securing planning applications across London and the surroundings.
Get in touch
EES CONSTRUCTION
Rating: 5 out of 5
Extension Builder in Mill Hill
I have almost a decade of experience in construction. I am confident in all things extensions, loft conversions and kitchen & bathroom fitting as well as decorating & painting👷‍♂️🏠 We are not the only ones - but we are the best 😉
Get in touch
Latest review:
Restoration & Refurbishment- 14 Sep 2024
Job was done quickly and efficiently. Very responsive and able to jump in quickly and do above and beyond what's needed!
STUDIO20 GROUP LTD
Rating: 5 out of 5
Extension Builder in Mill Hill
Studio 20 Architects is a vigorous and contemporary architecture firm based in Richmond, yet operating across London and South East England and covers all London and Surrey. We offer a full range of services including; *Architectural Services *Planning Application Services *Building Regulation Drawings *Structure Engineering Services *Extension *Loft Conversion *Project Management *Flat Conversion *HMO *Change of Use *New Build House *Interior Architecture & Design Services
Get in touch
Latest review:
Architecture- 6 Jun 2021
Nadir is just the most ideal artitech we want! He is polite, offer tips, smooth communication thru, very professional. We already ask him to work together on next project. Highly recommended to all.
Sandhya Mahadevan
No reviews yet
Extension Builder in Mill Hill
I am a Structural Engineer with experience delivering structural design for residential and commercial projects. I specialise in alterations to existing buildings, including wall removals, loft conversions, extensions, and steel and timber design. I provide clear calculations, drawings, and practical solutions that meet Building Regulations and site constraints.
Get in touch
Mikheil Gugunishvili
New on MyBuilder
Extension Builder in Mill Hill
I have experience 18 years
Get in touch
Peter Build
Rating: 5 out of 5
Extension Builder in Mill Hill
We offer professional service for all your local building requirements. With our team of professionals no job is too small or too big to handle. From Small Brickwork jobs to large extension work, we can do it. Our team of professionals have years of experience and know-how to carry out all jobs to the highest quality without charging extortionate prices.We are a small friendly local Builders with over 20 years experience!
Get in touch
Latest review:
Bathroom Fitting- 5 Nov 2019
I met up with Peter, told him what needed doing and he provided a detailed quote within days. I handed over a set off keys and basically left him and his team to get on with it! This was a time restricted job, he purchased all the material and provided all the receipts. I returned a week later to find the job completed to the highest standard surpassing my expectations. I will definitely be working with Peter again in the future and I would highly recommend him.
Max Building Ltd
No reviews yet
Extension Builder in Mill Hill
Life warranty
Get in touch
RA Designs and Build Ltd
Rating: 5 out of 5
Extension Builder in Mill Hill
We are a dynamic construction firm specialising in innovative design and high-quality building solutions for both residential and commercial projects. With a commitment to excellence and attention to detail, our team of experienced architects, engineers, and skilled tradespeople collaborates closely with clients to bring their visions to life. We prioritise sustainable practices and utilise cutting-edge technology to enhance efficiency and ensure the durability of our structures. From initial design concepts to final construction, we are dedicated to delivering projects that not only meet but exceed client expectations, creating lasting value and aesthetic appeal. Our customers consistently recommend us for our commitment to quality, attention to detail, and exceptional customer service. They appreciate our ability to turn their visions into reality while staying on schedule and within budget. Positive testimonials highlight our professionalism, seamless communication, and the collaborative approach we take throughout each project. Clients feel confident entrusting us with their building needs, knowing that we prioritise their satisfaction and work tirelessly to ensure memorable and successful outcomes.
Get in touch
Latest review:
Excellent quality of work which has not caused any problems for many years. Efficient work style whilst keeping up a high standard of work.
D Halpin
Rating: 5 out of 5
Extension Builder in Mill Hill
Hi my name is Dan I have been bricklaying for over 20 years.i don’t mind what the job is small or big and I am responsible priced
Get in touch
Latest review:
Bricklaying- 5 Jan 2026
Would thoroughly recommend Dan. He was friendly, prompt and did a great job repairing our brick wall.
Highbury Builders
New on MyBuilder
Extension Builder in Mill Hill
We are a professional building works company specializing in high-quality residential and commercial construction. Our team delivers reliable workmanship, clear communication, and projects completed on time and to specification. We are committed to safety, compliance with regulations, and excellent customer service on every job.
Get in touch

3.9

Top rated Extension Builders

Our Extension Builders in Mill Hill, are rated 3.9 out of 5 based on 15 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What types of services are offered by local extension builders in Mill Hill?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Mill Hill for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Mill Hill who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Mill Hill extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Mill Hill?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Mill Hill will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Mill Hill extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Mill Hill home extension project is likely to cost.

Find extension builders in Mill Hill with MyBuilder

Hiring the right extension builder in Mill Hill with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Mill Hill extension builders. Once your job is live, we’ll share it with home extension builders in Mill Hill who can express their interest.

Step 2: Compare different extension builders in Mill Hill

When you start receiving interest, review profiles of local Mill Hill extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Mill Hill extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Mill Hill, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Mill Hill extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Mill Hill extension builder before hiring?

Before hiring an extension builder in Mill Hill or extension building company in Mill Hill, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Mill Hill?

An extension builder in Mill Hill should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Mill Hill extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Mill Hill?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Mill Hill extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Mill Hill extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Mill Hill

Can an extension builder in Mill Hill help with planning permission?

Yes, many extension builders in Mill Hill can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Mill Hill handle everything from design to construction?

Many Mill Hill extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Mill Hill help with materials and finishes?

Yes, most extension builders in Mill Hill can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.