Swell Sport · Practical guide

Checking underground services before sauna site works

Check underground services before sauna groundwork is booked, not when a contractor arrives with equipment. Your job is to organise a complete information handover: the work area, utility responses, private-service records and unanswered questions. Receiving plans is one stage of that process, not permission to excavate.

Swell Cedar Cube 2 in a home setting.

Include all ground works in the enquiry

Draw the proposed base, electrical route, any drainage works, new fence or screen posts and the access area needed by contractors. Give the enquiry a project name so the same records follow the job from landscaping to electrical work. If the sauna moves, tell the person coordinating the enquiry before the new position is treated as ready.

For a Cube project, use the current cabin proposal to define the work area, but ask the trades to identify their own associated works. A cabin outline alone may leave the service route or a new landing outside the area being discussed. Avoid promising a start date until those scopes are coordinated.

Nominate one person to collect responses

BYDA advises homeowners to determine who will lodge the enquiry before excavation work begins. Its service provides information about underground networks without requiring separate initial enquiries to every utility. Agree whether you or the principal contractor will submit it, and who will distribute the responses. ^[1]

Keep the enquiry confirmation, asset-owner replies, plan dates and accompanying instructions together. Use a response register with columns for organisation, document received, questions raised and person responsible. Ask the contractor to confirm that they have the complete pack rather than forwarding one convenient screenshot.

Treat omissions as questions, not clearances

BYDA states that plans are indicative and may not contain specific details within the property boundary. It also says never to assume service depth and suggests considering a skilled locator for private-property assets. Those qualifications matter in an established garden with years of undocumented alterations. ^[1]

Add any owner-held irrigation, pool, lighting, tank or drainage records. Photograph visible meters, inspection points and service entries from normal access areas. Label these as clues, not verified routes. Ask the relevant contractor or asset owner how unknowns will be resolved; do not probe the ground yourself to make the drawing look complete.

Use a clear handover decision

A hypothetical owner receives a utility plan showing a main near the boundary but no detail beside an old garden shed. The proposed sauna cable route crosses that blank area. The useful response is to flag an unresolved private-service question and request the appropriate locating advice, not to label the route unobstructed.

Before work starts, ask the contractor to explain which records apply, whether further asset-owner contact or locating is needed, and who controls changes to the work area. Preserve the answer with the job file. This guide intentionally gives no digging depths, separation distances or excavation techniques; those belong to the applicable asset requirements and the contractor’s safe work planning.

Your practical checklist

Draw associated trenches, posts and drainage works, not only the cabin.
Name the enquiry owner and response coordinator.
Log missing private-service information explicitly.
Reissue the pack when the work area changes.

Does a blank BYDA plan mean there are no services?

No. BYDA says plans are indicative and may omit specific details within the property boundary. Resolve that uncertainty with the contractor and relevant asset owner or locator. ^[1]