Extension planning / Preparation

Your house extension planning checklist

Before drawing a bigger house, describe the life you want it to support. An extension brief should explain what the extra space must do, how it connects to existing rooms and what needs checking on the site. Use this checklist to prepare an extension discussion with Fix All.

Timber structure during construction
From the Fix All Construction project gallery.

Turn “more space” into a useful brief

Write a short list of the problems the extension needs to solve. A second living area, an extra bedroom and a larger kitchen each affect circulation differently. Consider the rooms already there as well as the new footprint, so the addition does not leave an awkward passage or a room with a weaker connection to the rest of the home.

Extension readiness checklist

StagePrepare thisDecision to make
Household briefEssential room functions, storage and daily routes.What must the project achieve?
Property informationExisting plans, site information and past approval records.What further records or assessment are needed?
Site discussionSun, privacy, slope, access and outdoor areas to keep.Where should design work focus?
Design and approvalsThe current drawing stage and any council correspondence.Who confirms and coordinates the approval route?
Build preparationOccupancy, deliveries and key finish decisions.What must be settled before a start can be agreed?

Bring to the first conversation

  1. The address and a simple sketch of the existing layout.
  2. Photos showing the possible addition and surrounding ground.
  3. A prioritised room list, including what could remain unchanged.
  4. Any plans or approvals already commissioned.
  5. An honest indication of the budget and timing you want to discuss.

Trace the route through the finished house

If an extra bedroom can only be reached through another bedroom, the addition may not solve the household’s needs. Trace arrival, bedtime and bathroom routes on a simple plan before becoming attached to a footprint. Bring the awkward points into the design discussion.

Do I need completed plans before getting in touch?

No. The existing Fix All enquiry route asks what stage your plans and approvals have reached, including when none are prepared. Explain your current position. Early conversation can identify the information needed next, without treating an initial idea as an approved or priced design.

Further reading

Guidance checked 30 September 2026. Confirm the requirements and product information for your own project.

Let’s get it sorted.

Tell us about your property, the work you have in mind and where your plans have reached. Request a quote discussion or a site visit through our enquiry form.

Start your extension conversation
Isaac021 084 52766Aston020 4116 5638

Wellington, the Hutt Valley, Porirua and the Kāpiti Coast