How many windows does a typical UK house have?

A 3-bed semi-detached house typically has 10-14 windows. A 4-bed detached house has 16-22 windows. Terraced houses typically have 8-10 windows. Bungalows have 8-12 windows. These are averages — actual counts vary by age, style and any extensions or conservatories.

Should I count French doors and patio doors as windows?

Yes, include them in your window count for cleaning quotations. Large patio doors and French doors have significantly more glass area than standard windows, so some cleaners count them as 2-3 windows when quoting. Always clarify with the customer what is included.

How do I quickly estimate windows during a phone enquiry?

Ask the property type (terrace/semi/detached), number of bedrooms, and whether there is a conservatory or extension. Use the estimates from this calculator as a starting guide. Always confirm the actual count during the first visit and adjust pricing if needed.

How much should I charge per window?

UK residential window cleaning rates are typically £1.50-3.00 per window for regular 4-weekly cleaning. First cleans or one-off cleans are usually charged at 1.5-2 times the regular rate. Hard-to-access windows, skylights and conservatory roofs may be charged extra.

CleanCalcs

Window Count Estimator

Estimate total window count for a property by building type and size.

Property Type

Bedrooms

Number of bedrooms

Storeys

Price per Window

Optional — for quick quote

How We Calculate This

How the estimation works

Window counts are estimated from typical UK property types with adjustments for bedrooms and storeys.

Base window counts

Terraced: 8
Semi-detached: 12
Detached: 18
Bungalow: 10
Flat: 6

Adjustments

Extra bedrooms above 2 add 1.5-2.5 windows each (varies by property type).

Properties over 2 storeys get a 30% increase.

Average glass area per window: 1.2 m².

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Last updated: February 2026

All calculations are estimates. Always verify quantities and timings for your specific situation.