Explain our pricing

I work in marketing at a construction firm. Help me explain how our pricing works on the website.

Context: Few contractors publish prices because every job differs. Homeowners still want a guide figure, and a page that explains what drives cost earns their trust.

Before you start, ask me for anything missing from this list:
- How we charge, with real examples
- What affects the cost
- What is included and what is extra

Then:
1. Say how pricing works in the first paragraph.
2. Give examples with ranges where I supplied them.
3. Say what changes the price.

Give me:
- The page copy
- Five pricing questions with answers

Rules:
- Use only the facts I give you. Where something is missing, write [detail needed]. Never invent a number, a name, a quote or a source.
- Describe building work in general terms only. Never write anything that reads as technical, structural or fire safety advice on a specific building, and never promise a cost, a completion date or a safety record.
- Write in plain English, in our voice if I have given you a sample.
- Do not tell me what the rules or regulations say. If something may be restricted, flag it and I will check.

Finish with a list headed "Check before this goes out". Include these, plus anything else the director who approves marketing or our health, safety and quality lead should see:
- Guide prices and ranges, against recent jobs really charged
- VAT, deposit and stage payment wording, against your terms
- What is excluded, such as fees, surveys and unforeseen work