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Halden Studio · architects

From first sketch to the keys.

A rear extension, step by step. We do the drawings, the city and the builders; you make the choices that matter and keep living your life.

44weeks, start to finishfor a typical single-story extension, with planning permission

Fixed fee from $4,800 up to planning. No fee for the first visit.

  1. Week 190 minutes

    Site visit

    Free, at your house

    You: show us the house and what bugs you about it.

    We: measure up, take photos and talk budget honestly.

  2. Weeks 2–43 weeks

    Concept design

    Two or three ideas, with a rough cost each

    You: pick the one that feels like home.

    We: turn it into plans and a 3D view.

  3. Weeks 5–148 to 10 weeks

    Planning permission

    The city's 8 weeks, plus checks

    You: tell the neighbors (we give you a friendly letter).

    We: send the application and answer every question.

  4. Weeks 15–195 weeks

    Technical drawings

    Every beam, drain and socket

    You: choose windows, floors and finishes.

    We: draw it all for building control and the builder.

  5. Weeks 20–234 weeks

    Find a builder

    Three fixed quotes, side by side

    You: meet them and choose.

    We: compare the quotes line by line and write the contract.

  6. Weeks 24–4416 to 20 weeks

    On site

    We visit every two weeks

    You: live with a little dust, and make the tea.

    We: sign off each stage before the builder is paid.

  7. Week 44the keys

    Move back into your kitchen

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