Sheds, garden rooms and offices
We build the full range, from practical sheds to garden rooms and home offices. The right choice depends on use, size and how the building fits with the rest of your garden.
Garden Rooms & Buildings
in Truro & Cornwall
Sheds, garden rooms and offices built fully custom or assembled from bought-in kits, and set on a solid, level base.
5.0 · 13 Google reviews
- Written contract on every job
- Warranty, typically 2 years
- Fully insured
- Detailed quotes
01
5-star rated
13 Google reviews
02
Written contract
On every job
03
Warranty
Typically 2 years
04
Fully insured
Employer's & public liability
Overview
Garden Buildings done properly
A garden building adds space without moving house: a home office, a hobby room, a summerhouse or simply secure storage.
We build garden buildings either fully custom or by assembling bought-in kits for you. We don't sell our own branded garden room products; instead, you choose the building that suits you and we make sure it's installed properly.
As landscapers, we also prepare the ground, base, access paths and surrounding garden so the building sits naturally in the space.
Who it's for
- People working from home who need a separate office
- Gardens needing secure storage
- Homeowners wanting a garden room or summerhouse
- Anyone who has bought a kit and needs it assembled
What happens if it's left
The cost of getting it wrong
Uneven bases
A building on an uneven or weak base twists, doors stick and water gets in.
Damp and rot
Poor drainage around the base leads to damp floors and rotting timber.
Awkward placement
A building in the wrong spot blocks light, views or access.
Half-finished surroundings
A new building with no path or landscaping never feels part of the garden.
Common mistakes we see
- Assembling a kit on unprepared ground
- Ignoring drainage around the building
- Forgetting paths and access to the door
How it works, step by step
- 01
Visit & inspection
We come out, walk the garden with you and look at access, levels, ground conditions and drainage.
- 02
Plan & detailed quote
We explain what the job involves and how long it will take, then put a detailed quote in writing.
- 03
Groundwork
Clearing, digging out, levelling and drainage. Getting this right is what makes the finished work last.
- 04
Build & finish
The work itself, done by Harry and the team.
- 05
Handover & warranty
We walk you through the finished job. Your written contract and warranty (typically 2 years) are yours to keep.
What you get
The benefits
01
Custom or kit
Fully bespoke builds or professional kit assembly.
02
Solid foundations
Ground and base prepared properly first.
03
Joined-up garden
Paths and landscaping that tie the building in.
04
Honest advice
Guidance on size and placement for your plot.
05
Clear pricing
Detailed written quote before work starts.
06
Warranty included
Written contract and warranty, typically 2 years.
In detail
Garden Buildings explained
Custom build or kit assembly
A custom build is designed for your space. A kit is a building you've chosen and bought; we assemble it for you. Either way, we prepare the base and ground properly.
Bases and ground preparation
Most garden building problems start at the base. We level and prepare the ground and plan drainage so the building stays square and dry.
Garden Buildings across Cornwall
We're based in Truro and carry out garden rooms across Cornwall: Garden Buildings Truro, Garden Buildings Falmouth, Garden Buildings Penryn, Garden Buildings Redruth, Garden Buildings Camborne, Garden Buildings St Austell, Garden Buildings Newquay, Garden Buildings St Agnes, Garden Buildings Perranporth.
Planning guide
Planning your garden buildings project
Start with how you'll use the space
Before choosing materials, think about who will use the garden and when. A space for summer dining needs different sizing, shelter and access from a low-maintenance front garden or a holiday let that needs to look smart between guests. Tell us how you live and we'll shape the garden rooms around it.
Look honestly at the ground
Slope, soil, existing walls, hedges and drainage all affect what's possible and what it costs. In Cornwall, many gardens are steep, rocky or exposed to the coast. We assess all of this on our first visit so your quote reflects the real job: not a best-case guess that changes once work starts.
Think about the whole garden
Garden Buildings rarely sits in isolation. It meets lawns, beds, boundaries, paths and steps. Planning these together avoids the cost of reworking levels or access later, and gives you a garden that feels designed rather than added to piece by piece.
Why Sea Green
What our customers tell us
Across 13 five-star Google reviews, the same themes come up again and again: punctuality, quick responses, professionalism, quality workmanship, detailed quotes and creative design ideas, and an ability to handle difficult sites such as steep slopes and coastal gardens.
Harry Lyall runs every job, working alongside his colleague Matt. You deal with the people doing the work, from the first visit to the finished garden, so nothing gets lost between the quote and the build.
Every garden rooms job is covered by a full written contract and a warranty, typically 2 years, confirmed in writing for your specific job, and by our employer's and public liability insurance. You know what's included, what it costs and what happens if anything isn't right.
Ready to talk it through? Call 07938 652967 (Mon–Fri, 8am–5pm), or request a quote online. You can also browse our homepage or all services.
Questions
Garden Buildings FAQs
Do you sell your own garden rooms?+
No. We build fully custom or assemble bought-in kits; we don't supply our own branded garden room products.
Can you assemble a kit I've already bought?+
Yes, we assemble bought-in kits and prepare the base for them.
What types of garden building do you build?+
Sheds, garden rooms and garden offices.
Do you prepare the base?+
Yes, ground and base preparation is part of the job.
Can you landscape around the building?+
Yes, paths, planting and surrounding hard landscaping.
How much will it cost?+
Every garden is different: access, ground conditions, slope and materials all change the price. Rather than guess, we visit, talk through the job and give you a detailed written quote so you know exactly what's included before anything starts.
Is the work guaranteed?+
Yes. Every job comes with a full written contract and a warranty. The length depends on the job and is typically 2 years; we'll confirm it in writing on your quote.
Are you insured?+
Yes. We hold both employer's liability and public liability insurance.
Do you cover my area?+
We're based in Truro and work across Cornwall, including Falmouth, Penryn, Redruth, Camborne, St Austell, Newquay, St Agnes and Perranporth. If your town isn't listed, call us and we'll tell you straight away.
Related services
Start your projectGet your garden buildings
Get your garden buildings
done right, first time
A detailed written quote, a written contract and a warranty, typically 2 years, on every job. Rated 5.0 from 13 Google reviews.