Does an attic count in the WWS?

By Renewable Partners B.V. · Published and updated:

An attic can count in the WWS, either as a room (1 point per m²) or as an other space (0.75 points per m²). Whether and how it counts depends on access (fixed stairs or not), ceiling height and layout under the policy manual. Parts with insufficient height do not count.

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What matters

For an attic the policy manual looks at access (fixed stairs or a loft ladder), clear height and whether the space is fitted out as a room, for example with a window. Under sloping roofs only the part with sufficient height counts.

An attic reachable only by a loft ladder is valued differently from one with fixed stairs. Have this assessed per property; the exact rules are in the policy manual.

Worked example (fictitious)

A fictitious attic has 24 m² of floor, of which 15 m² has sufficient height because of the sloping roof. With fixed stairs and fitted out as a room: 15 × 1 = 15 points. As an other space: 15 × 0.75 = 11.25 points.

Measuring the full 24 m² would therefore overstate the points. A measurement report under the WWS measuring instruction prevents this.

What this means for you

Attics are a common source of disputes. Have the usable area measured and record access and layout with photos.

Frequently asked questions

Does an attic with a loft ladder count?
It is valued differently from an attic with fixed stairs; the policy manual rules apply.
Do sloping parts count?
Only the part with sufficient clear height under the measuring instruction.
How do I avoid disputes?
With a measurement report and photos of stairs, height and layout.

Official sources

General information, not individual legal or financial advice. Proposed legislation and subsidy conditions can change. Check the source and have your property, contract and improvement plan assessed.

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