Balancing a bach budget: compare a different design, not just cheaper finishes

Name what makes the trip worthwhile

Write a short description of a visit you genuinely look forward to. Perhaps it is cooking while friends sit nearby, reading with a view or coming back from the beach without worrying about wet gear. Choose the things that would make you want to return.

Then separate those experiences from the particular features currently meant to provide them. Eating outdoors does not automatically settle the size or shape of a deck. Having visitors does not settle whether they need their own wing. I would give the designer permission to question the proposed solution while protecting the experience.

• What would you miss most if it disappeared?
• Which feature came from an image rather than an actual need?
• Which compromise would you happily accept on holiday?

Ask for an alternative that works on its own

In a hypothetical bach project, a family might have a separate guest pavilion linked to the main house. I would ask the designer to test a version with guest accommodation within one building, keeping the gathering space they value. That is a different design to assess, rather than the original with a room crossed out.

The alternative needs its own answers about privacy, circulation, daylight and outdoor space. It may suit the family, or reveal that separation is worth protecting. Neither the saving nor the better layout should be assumed before the team has investigated it.

• Show what moves as well as what disappears.
• Draw the furniture and routes in the revised layout.
• Describe any loss of convenience plainly.

Price the whole change

Ask the builder or quantity surveyor to assess the revised scheme and explain the difference from the original. I would not subtract a room from the floor area and treat the result as a confirmed saving. Ask which parts of the work change, which remain and what new work the alternative introduces.

MBIE's building-process guidance identifies quantity surveyors as an option for estimating costs from plans. It also recommends checking plans and budget before applying for building consent. That supports getting the alternatives tested while there is still an opportunity to choose a direction.

• Which drawings and specification were used for each figure?
• Have both options included the work needed to make the bach usable?
• Which amounts still need investigation?

Try a keep, change, consequence sheet

Use a sheet with three headings: what we keep, what we change and what we accept as a result. Give each alternative its own sheet. For the guest-pavilion example, you might keep dedicated guest beds, change their location and accept less separation between households.

Add the team's cost assessment beside the sheet once it is available. Read the consequences aloud with everyone making the decision. If nobody will accept them, that option has not solved the brief, however appealing its total looks.

• Keep the original option visible for comparison.
• Record unresolved questions beside the affected choice.
• Choose the option as a whole, rather than mixing incompatible parts.

Leave the meeting with a direction

Alison's published feedback about her Waiheke holiday-home extension mentions receiving design options as ideas developed. It is a useful reminder that exploring alternatives can be part of the design conversation.

Once you agree a direction, ask the designer to confirm which scheme will move forward and which ideas have been set aside. If your bach brief and budget are pulling apart, bring both to a conversation. I would be happy to help you identify a practical alternative worth testing.