How We Build Your Garden Room – Step by Step

The first step in creating your bespoke garden room is developing an initial design that suits your space, lifestyle, and budget.

This can begin in a few different ways. Many customers start by using our free online garden room design tool, which allows you to explore layouts, sizes, and finishes at your own pace. Others prefer a quick phone or video call, where we can talk through your requirements and create a 3D garden room design and outline specification for you.

Once you’ve received your 3D garden room design, along with a detailed specification and cost guide for that size and style of garden room, you’ll have a clear starting point.

The price provided at this stage is a guide, as every property is different. Factors such as existing electrics, access, and foundation requirements can vary from home to home. That said, the quoted figure is based on an average build cost for that type of garden room and includes allowances for everything you need including; concrete pile foundations, electrical connection, plastering, and internal finishes. In most cases, this means the final price doesn’t vary significantly.

The only caveat is that we haven’t seen your garden in person yet.

If the design and guide price sit comfortably within your budget, the next step is to arrange a free site visit. This allows us to properly assess your space, confirm the technical details, and finalise the design and specification with confidence before moving forward. This allows us to:

1. Confirm the cost
2. Check site access and installation logistics
3. Take photos of the existing fuse board and power supply
4. Assess ground conditions and positioning
5. Bring cladding, window, and door samples
6. Fine-tune the design and specification in person

By the end of this stage, you’ll have a clear 3D visual and specification that reflects exactly how your garden room will look and function, forming the foundation for an accurate quote and smooth installation process.

A garden room site visit allows us to fully assess your garden, access, and individual requirements, ensuring your bespoke garden room is designed correctly from the outset.

During the visit, we review practical considerations such as site access, ground conditions, and existing services, while also helping you make informed design decisions. We can advise on the best location for your garden room, refine the overall design, and finalise details such as cladding options, window and door placement, and orientation.

We’ll also:

1. Take photos of the garden to support accurate design and planning
2. Recommend the most suitable garden room foundation
3. Assess your electrical supply and power requirements
4. Show samples of cladding, windows, and doors

The site visit is designed to give you all the information you need to make a confident decision, with no pressure. It also gives you the opportunity to meet us in person and ask any questions you may have.

Most garden room site visits take no more than 45 minutes, depending on how many questions you have, and help ensure the final design, specification, and pricing are accurate before moving forward to get a detailed and itemised quote.

Once your garden room site visit has been completed, you’ll receive a detailed, fully itemised garden room quote within a few days. This will include everything discussed, along with a 3D visual of your bespoke garden room, helping you clearly understand the layout, size, and finishes.

If you’d like any changes, revisions to the design or specification can be made quickly. Alternatively, if you’re happy with the quote, simply click accept via the link. This automatically triggers your garden room deposit invoice and secures your project.

Once the deposit has been received, we’ll issue your Garden Room Drawing (FFWR). These are the technical garden room drawings used for installtion and include:

1. Precise dimensions and layouts
2. Wall, roof, and floor construction details
3. A complete list of materials and components being ordered

Our team checks the drawings thoroughly to ensure they align exactly with the approved quote. Once you’ve reviewed and confirmed everything is correct, your bespoke garden room enters production, with manufacturing beginning in our factory.

How Long Does It Take to Install a Garden Room?

The length of time it takes to install your new garden room depends on the size, specification, and complexity of the project.

We’ve completed smaller garden rooms in as little as two days, but in reality, most bespoke garden rooms take between 2-3 weeks from start to finish. Larger rooms, complex groundworks, or detailed finishes can take a little longer.

What often surprises customers is just how quickly the building itself goes up. Thanks to modern construction methods and factory-built wall and roof sections, your garden room can be fully up and weather-tight in just one week. From there, it’s all about the detail — turning the structure into a space that feels truly yours.

Below is a typical installation timeline, so you know exactly what to expect.

- Day 1 – Foundations and Delivery
The first day on site is all about setting solid foundations.

In most cases, we use concrete piles, which offer excellent strength while using far less concrete than a full pad. In some situations, we’ll use ground screws, and if a full concrete pad is required, that will usually be completed the week before installation begins.

On day one, we’ll also deliver and unload your garden room components, ready for construction to begin.

- Day 2 – Steel Frame Floor System

Day two is when things really start to take shape.

We install our steel frame floor system, followed by moisture-resistant chipboard flooring and the sole plate. This creates an incredibly strong, level base and allows us to build efficiently and accurately from the ground up.

- Days 3 & 4 – Walls and Roof

Over days three and four, the building comes together quickly.

The pre-manufactured wall and roof sections are installed, allowing the structure to go up rapidly. By the end of this stage, your garden room is usually fully formed and weather-tight, protecting it from the elements and allowing internal works to begin.

- End of Week One – First Fix & Plasterboarding

Once the structure is up, our electrician will carry out the first fix electrics.

In the same period, the room is plasterboarded and prepared for plastering, which usually takes place the following day. After plastering, the room is left to dry properly, typically for a couple of days, marking the end of the first week on most projects.

- External Finishes – Cladding, Roof & Steps

Once the plaster has had time to dry, the team returns to focus on the external finishes.

This stage usually includes:

- Roof completion
- External cladding
- Decking or entrance step (if included)

Depending on the materials chosen, this typically takes a couple of days.

- Internal Finishes – Flooring, Electrics & Final Details
With the room fully dry, attention turns back inside.

We’ll:

1. Lay the finished flooring
2. Fit skirting boards
3. Bring the electrician back for second fix electrics

Once everything is complete, the room receives a decorator’s coat of paint, followed by a full clean and tidy.

- Final Inspection, Snagging & Handover

Throughout the build, Kieron will be on site every couple of days, checking progress and keeping you updated.

Once the installation is complete and you’ve had a weekend to live with the space, Kieron will return to:

1. Walk through the room with you
2. Address any snagging items
3. Complete the final handover

This ensures everything is finished exactly as it should be — and that you’re 100% happy with your new garden room.

Payment Terms – How and When Payments Are Made

Once you’re happy with the proposed design for your garden room, we’ll send you a fully itemised online quote.

This quote clearly sets out everything we are supplying and installing, so you can see exactly what’s included. Once you’ve had time to review it and you’re happy to proceed, you can accept the quote using the link in the email. Accepting the quote automatically triggers the deposit invoice.

How Our Payment Structure Works

Payment for your garden room is split into three clear stages, which is a very common question we’re asked.

1. Stage One – 50% Deposit (On Order Confirmation)
The first payment is 50% of the total project value and is due when you confirm your order.

At this stage:
- We begin work on your detailed CAD drawings
- Once approved, your garden room enters production
- Long lead-time items such as doors and windows are ordered
- Your bespoke steel frame floor, wall panels, and roof sections are manufactured, all customised to your approved design and drawings

2. Stage Two – 40% Payment (14 Days Before Installation)

The second payment of 40% is due 14 days before installation.

By this point:
- Your garden room is typically around 50% complete
- Shorter lead-time materials are ordered
- Installation teams are booked and scheduled
- Final logistics are confirmed to ensure a smooth install

3. Stage Three – 10% Final Payment (On Completion)

The final 10% payment is due upon completion of your garden room.

This takes place after:
- We’ve walked around the room together
- Kieron has talked you through the build and finishes
- Any final checks have been completed

Once the final payment is made, you’ll receive:

1. The keys to your new garden room
2. Your electrical certificate
3. Aftercare and warranty information
4. If included, a QR code for setting up your Wi-Fi