Buckinghamshire grammar schools

There are no grammar schools in Harrow or Hillingdon, and the closest fully selective county system to Ruislip, Eastcote and Pinner is Buckinghamshire — a short drive west along the A40 or A413. Unlike the South West Herts consortium, Buckinghamshire doesn't reserve places for children living outside the county in the way some families assume. This page sets out how the system actually works, what relocating involves, and which Bucks towns HA4/HA5 families tend to end up in.

Three of the 13 — Dr Challoner's Grammar, Dr Challoner's High and Chesham Grammar — sit on the Metropolitan line and are commutable without moving; those three are covered in commute-specific detail on the main Grammar Routes page. This page is about the other ten, and about the county's admissions system as a whole.

How the Buckinghamshire system works

Buckinghamshire runs a single countywide entrance exam, the Secondary Transfer Test (STT — still commonly called "the 11+" locally), sat in September of Year 6. It covers Verbal Reasoning, Non-Verbal Reasoning, English and Maths, and produces an age-standardised score. A score of 121 or above makes a child "qualified" for a grammar school place — but qualifying is not the same as being offered one. Every year there are more qualified children than places, so schools then apply their own oversubscription criteria (siblings, distance, and priority for children eligible for Free School Meals/Pupil Premium) to decide who actually gets in. A higher score above 121 does not improve a child's chances — it's a pass/fail threshold, not a ranking.

Children who attend a Buckinghamshire state primary school are entered for the test automatically. Children at any other school — including everyone in HA4/HA5 — need to actively register during the window that opens in early May and closes in mid-June of Year 6, then travel to a Buckinghamshire test centre in September to sit it, since testing isn't offered locally.

The residency question: do you have to move before the offer, or before term starts?

This is the part families most often get wrong. Buckinghamshire Council is explicit that qualifying for a grammar school place does not guarantee one, even if you later prove you've moved into the county. Distance from the school is used as a tie-breaker among qualified children when a school is oversubscribed, so where you live in Buckinghamshire matters for your actual odds — not just whether you live there at all.

There's also a hard cut-off date, usually 1 September the year before entry, for the home address used in the first round of allocations. Moving after that date means your previous address is still used for that round — your new address only counts for the reallocation round and beyond. And moving in doesn't have to mean the family's forever home: what the council actually asks for is evidence of your child's main residence — things like a tenancy agreement or completed purchase, council tax registration, and utility bills in your name at the new address, all from before the cut-off.

Not every school uses that same date. Dr Challoner's Grammar School and Dr Challoner's High School both set an earlier residency cut-off — 1 April the year before entry, rather than the general 1 September — so a move timed around the more commonly-quoted county-wide date would actually be too late for either of these two specifically. Always check the exact date on the individual school's own current admissions arrangements rather than assuming the county-wide date applies everywhere.

Appeals for grammar places are rarely successful, even for children who scored well above 121 — so the honest framing for families is: the only reliable way in is to have a genuine, evidenced address inside the catchment area for the specific school you want, in place before the relevant deadline — not a late scramble after National Offer Day.

Renting vs. buying

Because it's residency that's being evidenced — not homeownership — a rental tenancy can, in principle, establish an address just as validly as a purchase, provided it's genuinely your child's main home and you can document it (tenancy agreement, council tax, utility bills, electoral roll) from before the address cut-off date. Some families do use a rental as a lower-commitment way to secure a catchment address for the application year.

A few things worth weighing before going down that route:

• Distance still decides it among qualified children. A rental just inside a catchment boundary may still lose out on the tie-break to a family who lives closer, so "any address in Buckinghamshire" isn't the goal — the address needs to be genuinely competitive for the specific school.
• Short-term/purely admissions-driven rentals attract scrutiny. Schools and councils have seen this pattern before and can ask for evidence that a family is genuinely resident, not using a temporary address of convenience. Weak or late-dated paperwork is a common reason families lose out at the tie-break stage.
• Keeping the old family home can disqualify the new address entirely, not just weaken it. Some schools' admissions arrangements go further than general scrutiny: if a parent still owns a property that was recently the family's home and sits within a set radius of the school, the closer address won't be accepted as the basis for a place — even if that old property has been leased out to someone else. The requirement is genuinely to dispose of the former home, by selling it or ending your interest in it outright, not just moving out of it. A 2026 Schools Adjudicator ruling on one Buckinghamshire grammar school's version of this clause found that an absolute, no-exceptions bar went too far and had to allow families a chance to provide evidence — but it confirmed the underlying principle (scrutinising a still-owned nearby former home) is legitimate. Policies and exact wording vary by school and change year to year, so check the specific school's current arrangements for its own version of this rule before assuming a lease resolves it.
• A rental doesn't fix the commute problem it creates. If a parent still works in or near London, moving further out changes two commutes (yours and eventually your child's, if the school offer doesn't land where expected) — factor this in alongside the schooling decision.
• It's a one-way bet if the score doesn't land at 121+. Because the test happens in September of Year 6, after most tenancy or purchase decisions would need to be finalised, families are often committing to the move before knowing whether their child has qualified at all.

The 13 Buckinghamshire grammar schools

Buckinghamshire's catchment maps are only published as static PDFs or an address-only checker — there's no public map you can browse without already knowing a postcode. So instead, here's what each catchment actually covers in plain English, based on the schools' own published admissions guidance, plus the most recent National Offer Day cut-off. See how this has moved over the last three years →

c = 2026 place filled by catchment alone, not open distance · s = decided by a sibling rule · p = decided by an inner priority-area tier · unmarked = a genuine out-of-catchment Distance cut-off. These are the towns each school itself names as its catchment, current as of recent admissions cycles — boundaries are reviewed and can shift, so always confirm a specific address against the school's own current admissions policy before relying on this.

Where to get access to the most grammars

If maximising choice — rather than proximity to HA4/HA5 — is the priority, two towns stand out: each puts three of the 13 schools within the same town, covering both a boys' and a girls' option.

The Amersham/Chesham cluster covered below is the closest three-school grouping to Ruislip/Eastcote by distance, but it's two boys'/girls' pairs plus one co-ed rather than a true three-way choice within a single town.

Where HA4/HA5 families tend to relocate

This isn't drawn from a formal survey — it's the pattern that falls out of simple geography and transport links. Ruislip and Eastcote sit right on Hillingdon's western edge, so the realistic Bucks towns are the ones in the south of the county, reachable via the A40/A413 or the Chiltern Main Line into London Marylebone (useful if a parent still commutes into the city). Aylesbury and Buckingham, in the north of the county, are a considerably bigger move — 25 miles or more — and far less common for families moving specifically from HA4/HA5.