Swell Sport · Practical guide

What a sauna site plan should show your trades

A useful sauna site plan lets every trade identify the same location and the same unanswered questions. It does not need to look like a polished architectural drawing. It does need dimensions, an orientation, a revision date and an honest distinction between measured facts, proposed work and details awaiting professional design.

Swell Cedar Cube 2 in a home setting.

Give the drawing a reliable frame

Write the address, date, author and revision on the sheet. Add north, the house, the relevant boundaries and a named reference point such as the rear house corner. If you have no verified boundary information, say so; a fence line should not quietly become a surveyed title boundary.

Draw the proposed cabin in relation to fixed features and provide the dimensions used. Label each dimension as measured, supplier-specified or approximate. If the plan is not drawn to scale, mark it clearly and write the important dimensions rather than inviting trades to measure a printed image.

Show three different envelopes

Use a solid line for the cabin, another line for the proposed base and a dashed outline for access and service space. Identify the actual model and heater package beside the drawing, with document titles or revisions attached. Leave unconfirmed clearances as named questions; do not fill them with convenient round numbers.

Add the door opening, assembly area, delivery handover point and route to the site. Show nearby equipment, gates, taps, retaining walls and changes in level. The drawing should reveal clashes between scopes before a contractor arrives, without choosing a lifting method or designing a foundation.

Create separate service and water layers

Mark visible meters, inspection covers and known service information, including where that information came from. BYDA warns that enquiry plans are indicative and may not contain specific details within a property boundary. Label any transferred utility line accordingly; a neat line on your drawing is not a verified underground position. ^[1]

Use arrows for observed surface-water movement and a different style for proposed drainage. Include photographs keyed to those arrows. Put the intended electrical route on a proposal layer for the electrician, not in a section labelled approved works. Keep cable sizing, protective devices and connection instructions out of an owner sketch.

Make unknowns visible and assign them

Add a register with these fields: reference number, question, evidence required, responsible person and status. For example, U1 might ask whether an existing base is suitable, with the site professional responsible; U2 might ask for a confirmed cabin service space, with the supplier responsible. A written answer should identify which drawing revision it addresses.

In a hypothetical project, the electrician proposes a service route through the area the landscaper has reserved for drainage. Neither quote is necessarily wrong in isolation. The shared drawing exposes the overlap, and the relevant contractors can coordinate a revised arrangement before either starts.

Issue one coordinated version

After the responses arrive, update the drawing and retain the previous version as superseded. Send the same revision to the supplier, installer and affected trades. Ask recipients to flag assumptions that differ from their scope rather than treating silence as approval.

Keep a short cover note: what changed, which questions remain open and which activities are not yet released. This is a coordination pack, not a council approval document or a stamped installation design. Its value is preventing separate conversations from turning into incompatible work on site.

Your practical checklist

Put address, north, date and revision on every sheet.
Separate cabin, base and access/service outlines.
Label indicative utility information and observed water movement.
Assign every unknown and circulate one agreed revision.

Can a phone photograph replace the plan?

Photographs are useful evidence but rarely identify dimensions and responsibilities clearly. Number the photos and link them to a simple drawing so everyone can discuss the same feature.

Does a supplier reviewing my sketch approve all the site works?

Do not assume that. Ask what the review covers, and keep structural, drainage, electrical and authority decisions attributed to the people responsible for them.