Extension Builders in Castelnau

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in Castelnau

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G&j
No reviews yet
Extension Builder in Castelnau
I started my career as decorator in 2019 ,my goal is client satisfaction with a fair price and maintain the quality of my work which I intended to continue.
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ELEVATE PROPERTY RENEWAL LTD
No reviews yet
Extension Builder in Castelnau
ELEVATE PROPERTY RENEWAL LTD We are a professional property renovation and refurbishment company specialising in residential and commercial projects. Our services include building works, full refurbishments, internal and external renovations, plastering, painting, flooring, and kitchen and bathroom renovations. We operate to the highest standards of quality and health & safety, with a strong commitment to clear communication, transparent pricing, and meeting agreed timelines. Our focus is on delivering high-quality workmanship, long-lasting results, and a professional experience from project start to completion.
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Simply Extensions and Lofts Ltd
No reviews yet
Extension Builder in Castelnau
We're specialist’s in house extensions, refurbishments and Loft conversions in South London and all surrounding suburbs, with the aim to deliver. Everyone that we use for finishing, is a trade. This gives you a very high quality finish that is seldom achieved by a 'General-trade'. We are fast, clean and produce showroom quality. Our individual professionals are more than just people we work with, they are people we know. We make or exceed our deadlines to ensure client satisfaction!
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Thomas Kershaw
No reviews yet
Extension Builder in Castelnau
Building company with over 20 years experience in residential construction recently relocated from lancashire to south west London. Specialise in extensions, structural alterations, brickwork, groundworks, drainage, property repairs/maintenance, pointing landscaping and general building works. qualified bricklayer and stone mason with experience running a successful building company, I bring both hands on skill and strong project management to each job. Reliable, tidy and professional, I focus on delivering quality workmanship, clear communication and projects completed properly from start to finish. If you are looking for an experience builder you can trust, we'd be happy to discuss your project.
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PJ house LTD
No reviews yet
Extension Builder in Castelnau
Experience
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AS CONSTRUCTION 11 LTD
No reviews yet
Extension Builder in Castelnau
Our construction company, based in New Malden , southwest London, provides a full range of building services, from new home construction to renovations, extensions,bathrooms , landscaping, painting &decoration and loft conversions. Our skilled team of professionals is dedicated to delivering the highest quality workmanship and exceptional customer service. Our team is to make the home-building process not only smooth but genuinely rewarding. With us, you’ll create a home you can truly be proud of.
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Arti Construction Services Ltd
No reviews yet
Extension Builder in Castelnau
Welcome to Arti Construction Services Ltd, your local builders based in Wimbledon. We are a family-run business with more than 25 years of experience in the construction industry. We have built our reputation by providing high-quality building services. We provide a high-quality service at a reasonable price and work with you throughout the process from initial building design to completion of the project. From loft conversion and house extension to full house refurbishment and kitchen and bathroom renovations, we have you covered. We will survey the work required, provide relevant advice, recommend options, and follow up with a free quotation. Our professional team is fully insured.
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Bains builder
Rating: 4.6 out of 5
Extension Builder in Castelnau
we are doing many sort of work according to the customers need like plumping, electric work, bath and kitchen, loft extension and many more. our work is always out standing and always ready to help you.
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Latest review:
Bathroom Fitting- 25 Mar 2024
He was good when doing the job, and workmanship was very good, I cannot complain about that. I think what let down the entirety is aftercare & integrity of the builder. The fact we had given him multiple jobs in our house not just this one, and the first big issue we had within the first 2/3 months where our electrics stopped working in the bathroom for him to refuse to come unless I paid him £80? People usually give warranty with work and he claimed he doesn’t give more then a month which I find concerning especially with plumbing work, imagine a small leak getting worse over time before finding out. Luckily I had building insurance so when an electrician came out he said the builder had not tightened the pull switch which came loose, and I’d have had to pay to just tighten a switch. Now he’s blocked me on what’s app & for me that’s concerning and very unprofessional
Plumb4All
Rating: 5 out of 5
Extension Builder in Castelnau
With over 20 years’ experience in the plumbing and building industry, this has enabled our team at **Plumb4All** to become a well-known and trusted company. We offer a 24/7 call out service and long term support for existing clients as a single point of contact for any future queries and issues. Our many happy and repeat customers find us through word of mouth and being fully qualified gives you the peace of mind that quality of service and very high standards are at the core of our values.
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Latest review:
Bathroom Fitting- 7 Mar 2021
Very professional and very thorough Solved the problem efficiently Would definitely recommend.
Idm Builders Ltd
No reviews yet
Extension Builder in Castelnau
Founded in 2023, IDM Builders is a small, dedicated team based in Feltham , offering high-quality painting and decorating, plastering, tiling, decking,extensions and driveway services. We’re passionate about transforming homes and spaces with skilled craftsmanship and a personal, down-to-earth approach. At IDM Builders, no job is too big or too small. From fresh paint and flawless plasterwork to durable tiling and professional driveway installations, we bring attention to detail and pride to every project. As a small business, we focus on building trust with our clients through clear communication, reliability, and top-quality results. Most of our work comes from repeat customers and referrals—a reflection of the care we put into everything we do. If you’re looking for friendly, skilled tradespeople who treat your property with respect and deliver work that lasts, get in touch with IDM Builders today.
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Gill Construction
No reviews yet
Extension Builder in Castelnau
30 years of experience within the construction industry providing experience especially for loft conversions. Do call or quote for all types of types.
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Spoonerbrothers London
Rating: 5 out of 5
Extension Builder in Castelnau
Spooner Brothers London has 20 years of building experience We have a good reputation for customer service, many of our leads are recommendation, with competitive prices & a high standard of workmanship. We specialise in orangeries, conservatories, porches, Skypods, windows, doors & bi-folds ! We are Certass fenestration registered, so all work comes with a building compliant certificate and an insurance backed guarantee See our brochures on the Spooner brothers london website
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Latest review:
Windows & Doors (uPVC & Metal)- 29 Jan 2024
John did a fantastic job of replacing a large sash window in our kitchen. He was easy to work with, and was very clean and tidy with the job. On top of that the price was very fair, particularly for the calibre of work completed. Would recommend!!
Harmony House
Rating: 4.8 out of 5
Extension Builder in Castelnau
Why choose us? 1. We bring your concept to life 2. A friendly, professional and reliable service 3. Ensure the journey is an enjoyable one 4. Acting responsibly and transparently. 5. You’ll be delighted with the result!
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Latest review:
Extensions- 28 Feb 2026
Poor workmanship , messy guys , roof leaking , walls not done properly , overall not good workmanship as have to redo many aspects of the kitchen extension I have to now replace the kitchen roof which was of poor quality , never employ Peter or Mariusz
Antonio travaglia junior
No reviews yet
Extension Builder in Castelnau
The main point is to provide a high quality service and see the customer happy, we work tirelessly for the best service and quality! We always work with the best products available and the best price in town! So if you are looking for a good job at a fair price, contact us!
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synergic design studio
No reviews yet
Extension Builder in Castelnau
My name is Sanjay Venkatakrishnan and I am an Architectural Assistant (Part 2) with a Master's degree in Architecture (RIBA Part 2) from the University of East London. I have extensive experience working with various architectural software such as Rhinoceros 3D, Autodesk AutoCAD, Autodesk Revit, Lumion, V-Ray, Enscape, and Adobe Creative Suite.
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Insight ProBuild Ltd
Rating: 5 out of 5
Extension Builder in Castelnau
At Insight ProBuild we act with uncompromising honesty in everything we do, gaining trust from our customers whilst making sure we own our projects from start to finish to produce a high-quality output. We undertake all aspects of domestic building works through our fully skilled and experienced tradesmen from plumbers to roofers to ensure your home is in safe hands.
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Latest review:
Completing our scope with Insight ProBuild from start to finish was one of the most least stressful projects we have ever completed. From start to finish, Anil was on hand generating creative ideas/suggestions, providing clear and achievable plans/schedules, and managing the scope to our agreed budget. Overall, Anil earned our trust through careful management of the Project, handling all the interfaces and taking the stress away from us, having a clear eye for detail and quality of his product, excellent communication through regular engagement with us and ultimately delivering a high-quality Project in the end. Even after completion, Anil was excellent by following up on any issues and ensuring we were still happy with the completed scope. Would recommend Insight ProBuild as Anil genuinely cares about his product and prioritising the relationship with his clients to ensure they are satisfied and happy.

4.2

Top rated Extension Builders

Our Extension Builders in Castelnau, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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

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 Castelnau 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 Castelnau who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Castelnau?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Castelnau 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 Castelnau extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Castelnau home extension project is likely to cost.

Find extension builders in Castelnau with MyBuilder

Hiring the right extension builder in Castelnau 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 Castelnau extension builders. Once your job is live, we’ll share it with home extension builders in Castelnau who can express their interest.

Step 2: Compare different extension builders in Castelnau

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

Step 3: Hire Castelnau extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Castelnau, 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.

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

What to ask a Castelnau extension builder before hiring?

Before hiring an extension builder in Castelnau or extension building company in Castelnau, 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 Castelnau?

An extension builder in Castelnau 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 Castelnau 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 Castelnau?

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 Castelnau 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 Castelnau 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 Castelnau

Can an extension builder in Castelnau help with planning permission?

Yes, many extension builders in Castelnau 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 Castelnau handle everything from design to construction?

Many Castelnau 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 Castelnau help with materials and finishes?

Yes, most extension builders in Castelnau 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.