Can reviewing a rateable value make it go up?
Do not assume every review can only move in your favour. That is one reason X-Ray includes evidence against taking action.
Why caution matters
Official VOA guidance has warned in revaluation contexts that changes to valuation information can result in a value going up or down. A formal process should therefore be evidence-led rather than treated as a risk-free discount request.
What X-Ray does differently
We deliberately surface reasons not to challenge: a valuation that sits within a reasonable comparator range, property facts that appear correct, or a change that broadly fits the wider pattern.
If the case is complex
Use a suitably qualified rating professional before committing to a formal valuation position.