House Extensions St Albans

Extend Your Home. Expand Your Life.

Bespoke house extensions in St Albans, tailored to how you live.

Join our happy customers, rated 5 stars for excellence and reliability across Google and Trustpilot!

Local. Trusted. Built Around You.

Why Choose Us For Your Home Extension?

As the most highly rated house extension specialists in St Albans, we build more than just extra space, we create bespoke extensions designed around the way you live. Whether you’re looking to open up your kitchen, add a playroom, or finally get that home office, we’ll help you design a home that works better for your family.

We don’t just build. We listen. Every extension we take on is tailored to your goals, your budget, and your day to day life, because we know that adding to your home is a big decision.

You’re not hiring a faceless firm, you’re choosing a local team that lives and works right here in St Albans. Over 90% of our projects come from word of mouth, and we take that trust seriously. We turn up when we say we will, keep the place tidy, and leave you with a home you’ll be proud of.

With Craig personally overseeing every project, your home extension journey will be completely stress free. No chasing trades, no disappearing acts. Just honest advice, solid craftsmanship, and a finished result that feels like it was always meant to be there.

Projects

Our Recent Home Extension Projects

Explore some of our latest home extensions completed in St Albans.

Hatfield Road

A Rear extension with wide open skylights offering plenty of well lit space to enjoy.

Eagle Way

A Single story rear extension and full refurb with a great media entertainment setup!

Beresford Road

A ground floor extension making a perfect hosting and entertainment area.

Collyer Road

A single story rear extension and full dormer loft conversion to add extra space.

Our Work

Featured St Albans Home Extension Project

Please take a look at some of the most recent construction projects we have completed in St Albans, Hertfordshire. View our rescent projects.

Costs

How Much Is A House Extension

Typically the cost of an extension will be cheaper than moving to a bigger home. If you love the home you live in, they are a great option. Prices can vary depending on factors such as size, complexity and design.

On average Single Storey, extensions range from £1600-£2600 per square meter. Double Storey extension prices range from £1700-£2800 per square meter.

For us to be able to provide you with an accurate quote, we would need to come and see your project.

All Inclusive Quotes

We manage the entire project with no hidden fees.

No Stress, No Surprises

We handle suppliers, trades, and timelines.

Our Benefits We Offer You

If you want to increase the space in your home without relocating, then an extension may be a great choice. They can also raise the value of your property and provide the necessary extra space.

Advice

We have years of experience and are here to help.

Flexibility

We offer custom payment plans to suit your budget.

Management

We will manage your project from start to finish.

Guarantee

Every project is guaranteed for workmanship.

Need a Local Builder You Can Trust?

Get a free quote for your building project today.

Customer Reviews

Real Stories, Real Reviews

    
 
 
         
   HK Buono 
 
 
 
  Had my garden renovation nicely done. Staff are attentive, sincere, efficient and knowledgeable. Able to answer to all my doubts and give constructive advice when facing contingent issues. They also clean up the place at the end of the project, no follow up cleaning needed.

One good builder with integrity, knowledge, expertise and efficiency. Will definitely call them up for my next project.

Highly recommended.
  
 
        
   Deepak Anand 
 
 
 
  Assigning Craig to manage our life long dream of creating a big kitchen/living room (90sqm) was one of the best decisions we ever made. We got in touch with Craig 1 year in advance of works commencing and from the get go Craig scheduled an initial meeting to discuss our plans. Leaving the meeting Craig gave us new ideas and put no pressure on signing and was happy to work around us.  Having visited several existing projects and received great customer feedback, we knew Craig was the builder for us as the quality of work was just exemplary. Craig saved us 5K by urging us to allow him to project manage the build and true to his word, he was on onsite multiple times per day, making sure everything was perfect. Along the way, we did encounter some problems, due to the existing condition of the garden but Craig always had a plan to work around them and not change designs with little or no change in cost. Craigs team are highly skilled, clean and respectful. They always tidied and locked up at the end of each day which left us worry free. One great trait about Craig; he treats his jobs like his own home and if he’s not happy with it,  the project does not move to the next stage.  It is no wonder he is respected in St Albans as a 5star builder. We will 100% be onboarding Craig again to do our 2nd story and driveway in the future. A big thankyou to Craig and his excellent team.
  
 
        
   Hannah Franco 
 
 
 
  Craig and his guys did some work in our garden for us and completely transformed it. We couldn’t be happier with the quality of work. The guys working for Craig were polite, punctual and respectful. I will be going back to Craig for our next house project.
  
 
        
   Siddika Walji 
 
 
 
  Thanks Craig for creating a beautiful outbuilding at the back of our garden. It looks stunning!
  
 
        
   Rebecca Hopkins

01727 637 183

info@cjsmiths.co.uk

Mon - Sat: 08:00 - 17:00