6 Tips to Help You Find the Best House Extension Company in London for you!

So, you’ve decided to expand your home space?  Fantastic!  Whether it’s to increase the value of your property or to open up more living space, it’s the kind of job you want to get done properly.

The problem is, finding the best extension company in London is not simple. There are many different contractors to choose from, coming from companies of different shapes and sizes and not all of them will be the best pick for your project.  For that reason, we’ve compiled 6 tips to help you find the best extension company in London for you!

House extension company in London builds beautiful extension

Step 1: Know What you Want

While it’s true that a lot of the details of your extension project will be hashed out after you’ve chosen your desired extension company, it’s important to have a good idea of what you want before you start your search. That way, you will be able to narrow down your choices to those who have a successful record for extension projects similar to your own. 

For example, what type of extension are you wanting? A rear extension? A side return? A wrap-around? The more information you can give to your prospective builder, the more information they can give you in return. 


Another important factor to take into consideration is whether you want a professional to design your extension and then a separate contractor to build your extension or if you would prefer to keep construction as well as the architectural elements of your build under the same roof, so to speak. This will play a key part in the type of company you will be looking for.

For more information on the different types of contractors and builders, read Resi’s article on this topic

Step 2: Get Some Options

Maybe you’ve heard of an extension company in London, or perhaps two. Maybe you haven’t. However, It’s always good to have options. A great place to find them is… right next door! Do any of your neighbours have an extension? How about any friends living nearby? What about family members? Ask them what construction businesses they used and what their honest opinion about them is. 

And what now? You’ve been given a few suggestions but where do you go from here? Well, first of all, you’ll want to weed out any companies that have little experience in extension projects. Also, if you want both the design and build to be handled by the same company (as discussed in the previous tip you should say goodbye to any who don’t offer both services. 

Now that’s been dealt with, it’s time to do a little digging with the choices you have left.

Step 3: Investigate

Some detective work is always necessary. 

Start with reviews and testimonials from previous clients. It’s easy to focus on negative reviews but no matter the tone, look closely at the reasoning given by the clients and, as always, use a little common sense.

The next step would be to get in contact with the extension companies. Ask them for a portfolio & if you can even visit previous projects. This will give you a real insight into the quality of work that they can produce. Many companies claim to be experienced in house extensions but if they do not have examples of previous work or clients you can visit, its best to steer clear.

Remember: a reliable builder is always happy to provide you with testimonials from previous clients and examples of their past work. 

Another thing, there are no formal builders’ qualifications that builders should possess in order to call themselves ‘a builder’ so we strongly suggest you check if the company is registered with an organisation that guarantees standards.

And also, don’t hold back from contacting an extension company in London for fear of commitment. You are well within your right to learn more about the company before you commit to working with them.

Step 4: Find Out What's Included

Always, always ask what’s included in the service you would be provided with. 

What guarantees are given? What exactly is included in the price? For example, is painting and decorating included? If the electrics needed to be modified, would the company pay, or would you?


Get very specific on this one to avoid possible misunderstandings down the road.

Step 5: Take Your Budget into Account

Let’s face it, you can find a great company with great reviews and all the right services but if their price is not a good match for your budget, they’re not a good match for you. The problem is, there are certain pitfalls to accepting a low-cost estimate. But, how do you know what’s a reasonable price?

You can find out by getting quotes from at least three different builders. This will help you get a more accurate picture of what a reasonable price for your project would be. Don’t forget to take into account what would be included in the price. Higher quotes can mean more value for money as well as more services provided. 

Lower quotes may indicate the builder isn’t pricing for every element. So once again, remember: ask what’s included! If you keep getting vague answers, you might want to consider looking elsewhere. 

Step 6: Sometimes It's Personal

This may sound unrelated but a good relationship with your contractor is key to making your project a positive experience for everyone. The better relationship you have with a builder and his company, the better communication on both sides will be. 

Let’s face it, when it comes to construction, things can go wrong. You want someone you can solve problems with. Asking yourself who you think you will get along with best can also help you if you’re stuck between two good options.

The Conclusion of the Matter Regarding Finding The Best Extension Company In London For you

All in all, don’t be in a hurry to make a decision. The company and contractor you choose will contribute greatly to the end result of your project. So, take your time to consider your options until you’re confident in your choice. 

We hope this next step in your extension journey goes well!