Groundworks & drainage
Site preparation, excavation, foundations and below-ground drainage as specified for your extension.
Conwy & North Wales
House extensions.
Built from the ground up.
Create more space at home with an extension shell built to an agreed specification. SN Groundworks brings together the groundwork and building trades, with finishing works available by separate agreement as your project progresses.
A clear scope from the start.
We quote for the shell build first. We set out exactly what is included, where our work finishes and what can be added later, so you can plan the next stage with confidence.
The shell build
Solid foundations.
Room to grow.
The work is tailored to your drawings and agreed specification. Each quote identifies the included elements and any exclusions.
Walls & structure
Build the shell to the agreed drawings, including specified masonry and structural elements, with the relevant trades coordinated for the job.
Roof & external envelope
Roof construction and covering to the agreed scope. Windows, external doors, insulation and external finishes are identified individually in your quote.
Finishing the space
Plan the shell.
Agree the next stage.
As the build progresses, we can discuss and price finishing works through our network of trades.
A main point of contact
Speak to Simon about the build and the trades needed for the agreed work. We keep the scope and next steps clear as the project moves forward.
Finishing works available
Internal finishing and fit-out can be discussed to suit your plans. We confirm the work, relevant trades and availability before making a commitment.
Separately agreed costs
Finishing works are not included in the shell price unless expressly listed. Any additional work is priced and agreed in writing before it starts.
Allow for later stages early.
Even when finishing works are agreed later, it helps to discuss your intended layout and services at the start so the shell can be planned around them.
Start a conversation
Tell us about your extension.
Send your postcode, a brief description, photographs and any drawings you already have. Let us know the status of your design and approvals so we can discuss a useful next step.
Serving Conwy, Llandudno, Colwyn Bay, Rhos-on-Sea, Abergele and Llandudno Junction.
Arrange a site visitUseful answers
What is included in a shell build?
The exact scope varies by project. Your quote will identify the foundations, drainage, structure, roof and other elements included, together with exclusions and the agreed completion point. Windows, doors and finishes should never be assumed to be included unless listed.
Can you carry on with the finishing works?
Yes. We can offer further finishing works as the project progresses, subject to the agreed scope, pricing and trade availability. These are agreed separately before work starts.
Do I need drawings before contacting you?
You can contact us at an early stage. Detailed pricing and construction need a sufficiently developed specification, with structural design and any necessary approvals in place for the work concerned.
Who handles design and approvals?
Responsibilities for drawings, structural design, permissions and building control arrangements are established before construction. Share any existing professional appointments and approvals with us when you enquire.