St Albans Garden Rooms

Outdoor Spaces
To Suit Your Needs

Are you looking for an outdoor functional space?

We are St Albans garden rooms leading experts. 

Struggling To Find A Reliable Builder For Your Garden Room?

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13+ Years of experience building garden rooms.

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Fully Customisable

Custom built to your unique requirements.

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5* Reviews

More than 90% of our work comes from recommendations.

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Why Choose Us
For Custom Garden Rooms In St Albans?

Since 2013, Cjsmiths builders St Albans has been providing high quality building services in the St Albans area.
We operate as a family-run business and take pride in the fact that 90% of our work comes from recommendations.
If you’re looking for a custom garden room, choose Cjsmiths and enjoy the benefit of working with a builder who prioritizes customer satisfaction.
And if you need help refurbing your garden rooms, we offer a full home refurbishment service. To get your garden room back to its former glory.


Garden Room

Benefits Of A Garden Room

Garden Rooms are a cost-effective way to add space to your family home. In most cases, there is no need for planning permission and the construction process is usually fast and hassle-free.


No Planning Permission

For leisure purposes only, garden rooms require no planning permission.

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12 Months Warranty Included

All our garden rooms are backed by a 12 months parts and labour warranty.


2-4 Week Quick Installation

 After confirmation we aim for a quick 2-4 week, hassle-free installation.


25+ Years Life Expentancy

Using only high quality materials expect a life expectancy of 50+ years.


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What Is A Garden Room

A garden room is ideal for those looking to add more space to their property without undergoing major renovations. This separate building is constructed in your garden and can serve many purposes.

Such as a workspace, workout area, temporary guest bedroom, or a spot to unwind and appreciate nature. Garden rooms are typically insulated and equipped with electricity, heating, and air conditioning. Making them suitable for year-round use. So, if you’re looking for a versatile, functional, and comfortable addition to your property, a garden room may be just what you need.



Our Garden Room Process

We use a 3 step process to design and build your perfect outdoor space. To see the full post of this garden room, please click here.

01. Foundations

 In this stage, we will remove debris and level the working area. Next, we will construct a wooden frame to enclose the perimeter of the concrete. After that, we will begin pouring the concrete, creating a smooth and level base. Finally, we will inspect the concrete base to ensure the durability of your garden room. There will be time allowed for it to set.

02. Structure

There are many ways to build an outdoor building, and we make them in wood and brick. In the next phase, we will begin the construction of the structure. None of our rooms are pre-fab, so we will build all structures by hand on site. This provides a solid outdoor building built for longevity, that you can enjoy for years to come.

03. Completed

Once the structure is complete, we start work on the inside. Our garden rooms are custom built to your specifications. You can choose the fixtures and furnishings to your taste. When we have completed the garden building, we will allow you time to inspect it. If you are happy with it we will sign it off together. Leaving you with our warranty.



Custom built Garden Room

Custom-built garden rooms are superior to pre-fab because they are tailored to your specific needs and preferences. You can choose the size, layout, and design that best suits your lifestyle and budget.

Garden rooms also add value to your property and can be a great investment in your home. Additionally, they can be designed to complement the style and architecture of your home, creating a seamless transition between indoor and outdoor living spaces.

Overall, a custom-built garden room is a unique and versatile addition to your home that can enhance your quality of life and provide a beautiful and functional space for years to come.



Types Of Garden Rooms

Garden Office

A garden office is an excellent option for those who work from home. It's a separate structure in your garden that offers a peaceful workspace free from home interruptions. They're comfortable, insulated, and come in different sizes and styles. Garden offices are a practical and cost-effective way to establish a productive workspace.

Wooden Gazebo

A wooden gazebo is a wonderful way to elevate your outdoor space and immerse yourself in nature. With the ability to personalise it with seating, lighting, heating, and more. You can create the perfect spot for dining, entertaining, or relaxing. This stylish and functional addition will enhance your living space throughout the year.

Garden Gym

Turn your garden into your very own gym and take your health to greater heights. This setup allows you to exercise in the privacy and convenience of your own home, away from distractions and crowds. The natural environment will boost your energy and mood. Making your fitness journey more pleasurable and productive. The best part is that it's a practical and affordable option.

Man Cave

A man cave in the garden can be a fantastic space for unwinding and having fun. You can personalise it with furniture, lighting, and sound to make it your own. We can provide advice for design and the options you have to create the perfect man cave.

Games Room

Creating a games room is a great idea for fun and budget-friendly entertainment with loved ones. There are many things you can do with this space. Including a PS5 or Xbox with a large plasma, Or a pool table and darts board area. This is the perfect addition for any party, family gathering, or casual hangout with friends.

Beauty Room

Having a beauty room at home is an excellent method for self-care. You can customise the area with your preferred lighting and decor. Indulging in treatments such as facials and massages without any interruption. It's a budget-friendly approach to creating a distinctive space that mirrors your personality.


An annexe is a separate living area attached to or near a larger home. It can provide additional living space for family members, guests or as a rental unit. An annexe is a versatile and valuable addition to any household.

Bespoke Design

At Cjsmiths, we specialise in building bespoke garden rooms catering to your requirements. Our team of experts collaborates with you to design a functional space that suits your needs. All of our outdoor buildings are fully customisable. Get in touch with us to schedule a consultation.



Garden Room Prices

Please note that the prices mentioned below are only estimates and include VAT. The measurements provided refer to the internal walls. It is important to keep in mind that all of our garden rooms are custom-built, and therefore prices may vary.






















Client Testimony

What Our Clients Say About Us?

Feel free to read more about what our previous clients have said about us designing and building their vision.

HK Buono
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
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
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
Siddika Walji
Thanks Craig for creating a beautiful outbuilding at the back of our garden. It looks stunning!
Rebecca Hopkins
Rebecca Hopkins
In the last couple of years we have used CJ Smiths to build us a house from scratch and also to completely renovate and extend our current home. We have been absolutely delighted with the service we have received and have recommended CJ Smiths to many friends and family. Craig and all of his team are professional, friendly and trustworthy and my family have always been pleased to have them working in our home. They are extremely tidy and mindful when working in a home with children, so we’ve never had to worry about any sharp edges/power tools being left around for little people to find! We have also never had to worry about builder’s bad language around the kids as they are all family men and are a pleasure to have around. The jobs have always been finished to a high standard and Craig is completely transparent when it comes to timings, costs, payment schedules and any delays that might crop up due to unforeseen circumstances like weather etc. The team works quickly and efficiently and you will actually miss them when they’re gone!!! Especially Terry the chippie who is completely wonderful and will even make a fuss of your dog and let it out for you if you need him to! 100% recommend CJ Smiths to anyone!
Natalie Atkins
Natalie Atkins
We have used Craig and his team for 3 home-renovation projects now, the last of which being July 2022 - we are looking forward to the team completing a 2-storey side extension for us later this year. - Trustworthy This is number one for us. They do what they say when they say they will do it and at the price agreed. Additional costs were extras added on / changed by us during the project. - Friendly Craig and his team have all been friendly and a pleasure to have in the property. They are polite and respectful and we are comfortable with them (especially as we have young children around). - Tidy The team tidy up at the end of each day and leave tools safely out the way. - Quality Work completed by Craig, his team & contractors has been to a high standard and where there has been a snag list, minor issues have been addressed promptly. -Communication Craig is available to us throughout each project by WhatsApp or phone. It helps having a central person to coordinate with all parties.
Robert Quinn
Robert Quinn
Highly recommended… We recently used CJ Smiths for an extension and full house renovation. From the first meeting, to completing the project, we found Craig and his team absolutely faultless. The project was on time but for unavoidable weather delays. There were also no surprises from a budget perspective. Anything that required an “extra” or a design change was met with a pragmatic response and always a mutually agreeable way of resolving - refreshing in a world where most things are viewed as a problem. Nothing was too much hassle for the CJ Smiths team, who always went above and beyond to ensure we were kept informed of every small change or decision that needed to be made. We even mildly miss the busy house when everyone was on site. A huge thank you to the entire CJ Smiths team - we are delighted with the end result and would highly recommend them to anyone embarking on a renovation.
Philip Tam
Philip Tam
CJ Smiths is a great choice for anyone looking for quality workmanship and friendly service. They pay attention to every detail and deliver excellent results. Their prices are also very reasonable for the value they provide. I was very satisfied with their work and would highly recommend them to anyone. CJ Smiths is the best in the business! 👍🏼
dale Anthony
dale Anthony
Great service - very reliable friendly builders! We had our garden room built in St Albans by Cjsmiths, we found that the level of advice and service was a cut above the builders we have used in the past. During the planning phase, they answered all of our concerns and together we were able to plan and create the perfect space we wanted. The team were very polite and respectful during the build, cleaning up the site daily and treating our home and garden like it was their own! We are incredibly happy with the final result, it was completed on time and to a very high standard. We highly recommend Cjsmiths to anyone looking for builders in St Albans! Thanks
Ryan Smith
Ryan Smith
Outstanding job! Craig and his team completed an loft conversion for us at the beginning of this year and we couldn't be happier. We were so impressed by his level of professionalism from the very start. He managed our expectations and gave us a realistic timeline for the loft conversion to be completed, which ended up being very close to his estimate. We highly recommend C J Smiths for anyone looking for a loft conversion or building work in general. We will definitely be using C J Smiths again in the future. Great job!


Frequently Asked Questions About Garden Rooms

If any of your questions are not answered in the FAQ below please feel free to send us an email. We would be happy to assist you!

A: Typically, there is no planning permission required for building a garden room in the UK. We build our custom garden buildings to fall within the permitted development regulations. Please keep in mind that there will be some exceptions due to the type of building and location. Please get in touch with us for help with the guidelines. 

A: A garden room provides significantly more room to your home by utilising empty garden space, ultimately adding value to the house. This varies depending on size and location. Studies estimate an increase in property value of 5-10%. 

A: Yes, we have had many customers that choose to build an extra guest bedroom or granny annexe in their garden. We can equip a shower room, kitchenette and living space but remember you must satisfy building regulations. 

A: Yes, you will need a concrete base laid before we install your garden room. This is to ensure the longevity of your garden room.

A: This varies depending on the project size, but it takes approximately 2-4 weeks. During the consultation, we will advise the lead time you will be looking at.

A: The cost will depend on the chosen fixtures and fittings, materials and the overall size of the building. A rough price chart is above, but please get in touch with us for more info. 

A: Absolutely! This is what we specialise in. We can offer advice on planning the perfect outdoor space for you.  

A: Yes, all of our rooms are designed and built by certified craftsmen. Resulting in a fully waterproof shell that can be enjoyed year-round. 

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