New Build Council Tax Band Scotland: How Bands Are Set and How to Challenge

How New Builds Get Banded

When a new home is completed in Scotland, the local Assessor assigns it a council tax band based on its estimated open-market value as of 1 April 1991. That's the same tone date used for every other property in the country — the Assessor has to work out what a brand-new 2026 property would have sold for 35 years ago.

This is inherently an estimate. There are no actual 1991 sales records for a house that didn't exist until last year. The Assessor relies on comparable properties — older homes of similar size, type, and location that were sold around April 1991 — and adjusts for differences.

The result isn't always right. New-build buyers regularly discover their band seems high compared to older properties on the same street, or compared to identical units in the same development.

Completion Notices and the Two Challenge Routes

New-build buyers face two distinct deadlines:

The Completion Notice. When a dwelling is completed (or deemed complete), the Assessor issues a formal Completion Notice. If you believe the completion date is wrong — for instance, the property wasn't actually habitable on the stated date — you can appeal the notice itself to the Local Taxation Chamber using Form C3 within 21 days of receiving it.

The Band Challenge. Once you become the taxpayer for the property, you have the standard six-month new taxpayer window, starting from the date your liability begins, to challenge the band through a proposal to the Assessor. This is the same route any new owner or tenant uses — it's not specific to new builds.

These are separate processes. You can challenge the completion date, the band, or both — but each has its own deadline and form.

When a New-Build Band Is Worth Challenging

The strongest challenges arise when comparable evidence clearly supports a lower band:

• Other units in the same development are in a lower band. If flats of identical floor area and specification in your building sit in different bands, that's a red flag.
• Older comparable properties nearby — similar size, type, and condition — are in a lower band. The Assessor should have used these as the basis for the 1991 estimate.
• The band range maths doesn't add up. If the 1991 band threshold for your assigned band seems too high for what comparable properties were selling for at that time, you may have a case.

Be cautious about assuming a new build should match an older property's band just because they're on the same street. The new build may genuinely be larger, have more rooms, or sit on a bigger plot — all factors that would justify a higher 1991 estimate.

The Assessor's Position

Assessors banding new builds have less direct evidence than when banding existing properties (where actual 1991 transaction records may exist). They rely on:

• Sales of comparable older properties around April 1991
• Adjusted comparisons accounting for size, layout, and location
• Their professional judgment as valuers

If you're challenging a new-build band, you need to engage with the same evidence base. Find comparable properties that were sold around 1991 and show they fall within a lower band range. The Assessor will defend their banding with their own comparable evidence.

The Risk Factor

As with any band challenge, submitting a proposal opens the valuation for review in both directions. The Assessor can still raise a new-build band if a review finds that it was under-valued.

The bigger practical risk for new-build buyers is missing the deadlines entirely. The 21-day completion notice window is particularly tight, and many buyers don't realise it exists until after it's passed.

Next Steps

If you've moved into a new build in Scotland and the band looks wrong, compare it against similar properties on the SAA portal before the six-month window closes. Our Scotland band appeal guide covers both the completion notice route and the standard band challenge process, with timeline trackers for each deadline.

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