Designing for off-site construction: keep the brief in the room

Start with the reason behind the drawing

A sketch can make a preference look more settled than it really is. You might draw a wide opening because you want to watch children in the garden, or a projecting room because you want a quiet reading spot. I would write that purpose beside the feature. It gives the team room to explore another arrangement without losing what matters to you.

Separate the outcome from your first idea for achieving it. 'A sheltered place to sit outside after dinner' leaves more useful design territory than a particular roof shape copied from a photograph. Keep the photograph, but explain what you like about it.

• What daily activity should this feature support?
• Which part would disappoint you if it disappeared?
• What could change without affecting that purpose?

Learn the system before refining every corner

BRANZ describes design for manufacture and assembly as part of the thinking behind prefabricated construction. For a homeowner, I would turn that into a request: ask the supplier to explain the design choices that make their particular system straightforward to produce and assemble.

Have them mark a preliminary plan. Which proposed spans, openings or changes in shape need discussion? Is a suggested adjustment essential, a preferred arrangement, or something that needs a separate design assessment? Ask what the alternative involves rather than interpreting every recommendation as a rule.

Our Flexi service considers the architectural layout alongside panel dimensions and openings. I would use that discussion early enough to explore options, before polishing an arrangement that the project team has not tested.

• Which parts of this sketch fit the system readily?
• Which parts need specialist input before we develop them?
• Can you explain a proposed adjustment on the drawing?

Test the small adjustment at room scale

Imagine a hypothetical dining room where the team suggests moving an external wall to suit the proposed panel arrangement. The outline still looks reasonable, but I would put the actual dining table and chairs back on the plan before accepting it.

Show someone sitting down while another person walks past towards the garden. Check the door swing and where a sideboard would go. Then compare the outlook from the seats you expect to use. A revised outline needs a fresh check of the room inside it.

Ask the designer and manufacturer to explore another option if the change undermines the brief. That might mean adjusting a neighbouring space, reconsidering the opening or retaining the original arrangement for further assessment. Avoid deciding from the external dimensions alone.

Bring a marked plan to the next conversation

For a practical exercise, mark three features on your concept plan. Beside each, write its purpose, what you are willing to vary and what you want preserved. Ask the design team to return with an option that responds to the proposed construction system, then review it against those same notes.

Andre's published feedback describes the value of understanding both the client's vision and the building system. I would want that relationship to stay visible in your own discussions, with adjustments explained in terms you can assess.

If you are exploring an off-site home, bring your initial sketch and the reasons behind it to a conversation. We can discuss what to test with the manufacturing team before taking the design further.