Teeth Whitening in Harrow
28 dental practices in Harrow publish what they charge for teeth whitening. Half of them ask between £295 and £399 for a course, and the middle price is £392 — about the same as the £385 pooled median across the 18 boroughs where we hold teeth whitening prices. The figures below are those practices' own published fees, read in August 2026, each one linked to the practice and its CQC registration. They are not quotes: what you pay depends on what the examination finds. Whitening is cosmetic, so the NHS does not cover it. By law only a GDC-registered dental professional may whiten teeth — a salon or beauty clinic offering it is committing an offence.
| Option | Cost (per course) | Notes |
|---|---|---|
| Private — lower | £309 | 25th percentile of 30 Harrow fee guides |
| Private — upper | £400 | 75th percentile |
| NHS | Not covered | Cosmetic / private-only |
How this is worked out. Every figure comes from a price list the practice publishes itself. We drop “from” prices, which describe the cheapest possible case rather than a price, and variants narrower than the treatment named. 28 Harrow practices remain. The middle price across all 18 boroughs we cover is £385. How we read a fee guide.
- The Harrow median (£392) sits within 3% of the pooled median across the 18 boroughs with published teeth whitening data on this site (£390, n=590).
- That makes Harrow the 6th most expensive of those 18 boroughs for this treatment.
- The middle half of prices runs £295–£399 (a £104 range), a moderate spread. The full range is £98–£699.
- 28 of the 86 CQC-registered practices in Harrow publish a price for this treatment (33%); the figures describe those 28, not the whole borough.
- All figures are per course, taken from each practice's own fee guide, so they can be compared like for like.
| Neighbouring borough | Median | vs Harrow | Middle half | Practices |
|---|---|---|---|---|
| Barnet | £385 | £8 less | £350–£425 | 51 |
| Brent | £380 | £12 less | £300–£410 | 23 |
| Ealing | £350 | £42 less | £288–£450 | 28 |
The lowest neighbouring median is Ealing at £350 — £42 below Harrow, from 28 published prices. Both are published prices, not quotes; a practice sets its own fee whichever borough it sits in.
Why do some Harrow practices list under half the median?
1 of 28 published prices are below £196: Marsh Lane Dental (£98). A figure this far below the borough median is often a narrower product than the rest of the table (a single session, a top-up, or an introductory offer) — check what the practice's fee guide includes before comparing.
Every statement above is computed from the 28 published prices in the table below; it changes when the data changes.
Download these prices as CSV — or the full London dataset. Free to reuse under CC BY 4.0, attributing DentistFees.
28 Harrow practices publish this fee. Each figure is the practice's own published price, read August 2026; narrower variants (“from” prices, child or temporary work) are excluded. Sorted lowest first.
A low figure is a real published fee, not a quote — complexity can change the price. Always confirm. How we verify
Professional teeth whitening uses hydrogen or carbamide peroxide to lighten teeth. In the UK it is legally only available through a registered dental professional.
Whitening is not permanent. In-chair results typically last one to three years; professional home whitening six months to two years; shop-bought kits a few months at most. A non-smoker who avoids coffee and keeps up hygiene appointments holds results far longer than the averages suggest.
The main things that shorten results are coffee, tea, red wine, dark sauces, berries and smoking. Acidic food and drink weaken enamel over time, making teeth more prone to re-staining. Most dentists suggest a top-up every 6–12 months — if you keep your trays, that usually means a fresh gel syringe (£30–£80) rather than a full course again.
Teeth whitening is the practice of dentistry under UK law — confirmed by the High Court in GDC v Jamous (2013). Only GDC-registered professionals (dentists, dental hygienists, dental therapists, or clinical dental technicians working to a dentist's prescription) may legally perform it.
On peroxide concentration: products releasing 0.1% or less can be sold to consumers (the strips and kits in shops, largely ineffective); 0.1%–6% is restricted to registered professionals; above 6% is banned outright for cosmetic use. Whitening is not permitted for anyone under 18.
If a non-registered person applies whitening gel to your teeth — a salon, a "whitening bar", a mobile provider — they are breaking the law regardless of the product, and the GDC prosecutes these cases with unlimited fines. A BBC investigation in late 2025 found a 26% year-on-year rise in reports of illegal whitening, with providers buying gel far above the legal limit. Before booking, look your dentist up on the free GDC register at olr.gdc-uk.org.
Ask what's included. A £300 quote covering consultation, trays, gel and follow-up beats a £200 quote that charges separately for impressions and each gel syringe. Get the total in writing first.
Keep your trays. Custom trays last years — for a top-up you only buy fresh gel (£30–£80), far cheaper than a new course.
Order matters with other treatments. Whiten before veneers, bonding or crowns — restorations are colour-matched and won't change shade later. Whiten first, wait two weeks for the shade to settle, then match any restorations. See our veneers cost guide and Invisalign cost guide.
Dental practices in Harrow
See all 86 practices in Harrow →
Other treatments in Harrow:
Teeth Whitening in other London boroughs:
See all prices and practices for Teeth Whitening across London or every treatment in Harrow.
No. Whitening is cosmetic and private-only.
No. Legally sold over-the-counter products are limited to very low peroxide levels. Only a registered dental professional can use effective concentrations safely.
NHS charges from DHSC (April 2026); private prices read from practices' own published fee guides, August 2026. CQC data under Open Government Licence v3.0. Methodology.