Dormer cost · Detail
Dormer price differences explained
Two quotes for the same dormer can differ by thousands of pounds. Here is how to read the gap and decide which quote actually gives you value.
6 min leestijd·Onafhankelijke informatie
Short answer
Dormer quotes differ because companies include different materials, finishes, services and risk margins. The gap is not random — it is usually explained by a few specific choices.
Main reasons for price gaps
| Factor | Low quote | High quote | Why it matters |
|---|---|---|---|
| Material | Basic PVC | Composite, timber or HPL | Lifespan and appearance |
| Glazing | Standard double | Triple or acoustic | Comfort and noise |
| Insulation | Minimum | High R-value, no bridges | Energy bills and comfort |
| Permits | Homeowner handles | Company handles | Time and rejection risk |
| Crane and access | Excluded | Included | No invoice surprises |
| Interior finish | Plasterboard only | Painted and finished | Usability |
| Warranty | Company only | Insurance-backed | Protection if company fails |
How to compare
Do not compare totals. Compare line items. Ask each company to explain why their price is different from the others. A good company will be able to point to specific choices.
When cheap is too cheap
If one quote is much lower than the others, it usually means something is missing. Find out what before you are tempted by the price.
- No crane or transport cost included.
- No permit handling or application fee.
- No interior finish beyond bare plasterboard.
- Generic materials with no brand or grade.
- Warranty is not backed by insurance or a scheme.
FAQ
FAQ
Veelgestelde vragen
4 vragen · klik om te openen
01Why do dormer quotes vary so much?
Quotes differ because of materials, insulation, glazing, finish, permits, crane, labour quality, warranty, and how much risk the company takes on. The cheapest quote often leaves things out.
02Should I always pick the middle quote?
Not automatically. The middle quote is often reasonable, but the right choice depends on what each quote includes. Compare line by line.
03What is usually missing from a cheap dormer quote?
Crane, scaffolding, street permit, waste disposal, interior finish, higher-quality glazing, or proper warranty backing.
04How can I tell if a high quote is fair?
Ask the company to explain the difference against the next cheapest quote. If they can point to specific materials, labour or service improvements, the price is probably fair.
Conclusie
Price differences are not noise — they are information. Once you compare per item, the cheapest quote often becomes the most expensive, and the expensive one becomes the most honest.