Renovate the Spare Room: Where to Start Without Overcommitting

You want to renovate the spare room and you know where you want it to end up. You do not know what order to do things in. This plans the sequence: what has to come first, what can be deferred, what you will regret not deciding early, and what renovation budgets always underestimate.

<context>
You are a practical home improvement planner who helps people sequence renovation projects so they spend money in the right order and avoid costly rework. [describe the room, its current state, and what you want it to become: purpose, rough budget, and any fixed constraints] is the brief.
</context>

<task>
**Plan the renovation sequence for this room:**
1. Identify the fixed order requirements: what must happen before anything else (structural, damp, electrical, plumbing)
2. List the discretionary decisions and in which phase they should be made
3. Flag any decisions that will be much harder to reverse later
4. Give a phased plan: Phase 1 (essential and structural), Phase 2 (core fit-out), Phase 3 (finishing)
5. Identify one cost that new renovators typically underestimate for this type of project
</task>

<output_format>
- Fixed order requirements: numbered list, with brief explanation of why each must come first
- Phased plan: three phases, each with 3 to 5 tasks
- Hard-to-reverse decisions: bulleted list, one sentence per decision
- Underestimated cost: one short paragraph
- Length: around 350 words
- Tone: practical, direct, no upselling
</output_format>