For parents and guardians: Please verify all school data — cut-off scores, applicant numbers and competition ratios — against official sources (school websites, local authority admissions data) before making any decisions. The figures on this page are researched but not guaranteed and change each admissions cycle.
Complete 2025/26 11+ Guide to Grammar Schools in Hertfordshire (SW Herts & Dame Alice Owen's)
Hertfordshire (SW Herts & Dame Alice Owen's) is home to 7 highly selective grammar schools — all formally partially selective (academic places alongside aptitude places), served by the South West Herts Schools Consortium (SWHSC). This guide covers every school — admissions criteria, competition data, cut-off scores, GCSE results, and specific prep advice — so you can make an informed decision.
How the Hertfordshire (SW Herts & Dame Alice Owen's) 11+ works
SWHSC (6 schools — WGSB, WGGS, Parmiter's, St Clement Danes, Queens', Rickmansworth): Two papers: Mathematics and Verbal Reasoning. Papers are bespoke (not off-the-shelf GL/CEM). Each paper is approximately 45–60 minutes with a short break between them. Raw scores are age-standardised (standardised age score / SAS) to account for month of birth. There is NO non-verbal reasoning paper. There is NO pass mark — places are offered in strict descending order of SAS score per each school's oversubscription criteria. Historical lowest SAS scores (not pass marks) are published by each school after National Offer Day. ——— Dame Alice Owen's (separate school — NOT in SWHSC): Two-stage process. Part I: 50-minute GL Assessment Verbal Reasoning paper (80 multiple-choice questions). Children ranked below position 325 do not proceed. Part II (top ~325 only): 60-minute English comprehension (written, set internally) + 60-minute Mathematics paper (written, set internally). Final combined SAS rank determines offers. No cut-off score is published — the school discloses the lowest rank offered in recent years for guidance only.
SWHSC: One online registration covers all six SWHSC schools (Croxley Danes is also a member but Music only — no academic test for Croxley Danes entry). Register once via swhertsschools.org.uk. Music and Sports aptitude tests are separate from the academic test and optional. No late registrations accepted. Parents must check the SWHSC parent portal for results and audition appointment details. Dame Alice Owen's: Completely separate registration and test — NOT part of the SWHSC system. Eligibility restricted to children with a permanent address in the Local Priority Areas (Hertfordshire parishes including Potters Bar, Hatfield, Welwyn Garden City, Borehamwood, and London postcodes in Barnet, Enfield and Islington). Register in Year 5 (mid-May to mid-June). Tests sat in Year 6 (September).
Key dates
Who can apply?
SWHSC: Any child may register for the academic test. There is no geographic restriction on sitting the test itself. However, each school's oversubscription criteria give priority to children within a defined admission area (Watford area vs. rest of area for WGSB/WGGS; priority postcodes WD3–WD25, AL1–3, HP1–3, HA6 for Parmiter's). Children from outside these areas may still secure academic places if their SAS score is high enough — typically a significantly higher score is required. [source: official — individual school admissions policies]
Dame Alice Owen's: Eligibility is restricted. Children must have a permanent home address within the school's Local Priority Areas at BOTH the date of test registration AND the date of CAF application. Local Priority Areas include Hertfordshire parishes (Potters Bar, Hatfield, Welwyn Garden City, Borehamwood/Elstree, Shenley, North Mymms, Northaw & Cuffley and others) and London postcodes in Barnet (EN4, EN5, N12, N14, N20), Enfield (EN2 sectors 7–8, N13 sectors 4–5, N21), and all Islington postcode sectors. Children outside these areas cannot sit the test. [source: official — damealiceowens.herts.sch.uk/sixth-form/admissions/secondary-transfer/local-priority-areas/]
All SWHSC schools give first priority to children with an EHCP naming the school and Looked After Children, before applying selective criteria. [source: official]
Music and Sports aptitude places (where available) require separate SWHSC test registration. Music Stage 1 is a written test; Stage 2 is a live audition. Queens' School is the only SWHSC school offering Sports aptitude places. [source: official — swhertsschools.org.uk]
Access arrangements (extra time, rest breaks, etc.) for SEND must be requested before the SWHSC registration deadline with SENDCo or Headteacher documentation. [source: official — swhertsschools.org.uk]
WGSB & WGGS postcode zone finder
WGSB and WGGS split their academic places between two zones. Enter your postcode to see which zone you are likely in.
Admissions process
Register online via swhertsschools.org.uk. One registration covers all six SWHSC schools. Choose which tests to take: Academic Ability (Maths + VR), Music Aptitude, and/or Sports Aptitude (Queens' only). Registration opens 1 April and closes 5–6 June. No late registrations. [source: official]
Two bespoke papers: Maths and Verbal Reasoning, each ~45–60 minutes, with a break between. Answers on machine-scanned answer sheets. Scores are age-standardised to produce a Standardised Age Score (SAS). No pass mark exists — places are offered in descending SAS order. [source: official — swhertsschools.org.uk/academic-ability-test/]
Stage 1: 60-question written music aptitude test (pitch, melody, rhythm, texture). Stage 2: Individual live audition (self-selected instrument/voice, max 3 minutes) for candidates who pass Stage 1. [source: official — swhertsschools.org.uk/music-aptitude-test/]
Academic and music scores are released via the SWHSC parent portal. Parents list school preferences on their LA Common Application Form by 31 October. [source: official]
Completely separate from SWHSC. Register directly with the school mid-May to mid-June. Only children within the Local Priority Areas are eligible. [source: official — damealiceowens.herts.sch.uk]
50-minute multiple-choice paper with 80 questions. Provided by GL Assessment. All eligible registered candidates sit this. Children ranked below position 325 on the age-standardised VR score do not proceed. [source: official — damealiceowens.herts.sch.uk/sixth-form/admissions/secondary-transfer/entrance-exam-information/]
Top ~325 candidates are invited back. 60-minute written English comprehension (internally set) + 60-minute written Mathematics paper (internally set). Final combined SAS rank determines offers. [source: official]
Offers made on 2 March (2026 cycle) or 1 March (2027 cycle). Each school allocates places by its own oversubscription criteria — not simply by highest combined score nationally. Sibling and staff-child criteria take precedence over selective criteria at most schools. [source: official]
School Directory
Disclaimer: Primary sources (all accessed March 2026): swhertsschools.org.uk; watfordboys.org; watfordgrammarschoolforgirls.org.uk; parmiters.herts.sch.uk; stclementdanes.org.uk; queens.herts.sch.uk; rickmansworth.herts.sch.uk; damealiceowens.herts.sch.uk; reports.ofsted.gov.uk; compare-school-performance.service.gov.uk (DfE — partial, 403 errors encountered; P8/A8 confirmed via school websites and secondary news sources citing DfE). Sunday Times Parent Power rankings sourced from school press releases and secondary news articles (paywalled guide). Always verify figures on the school or local authority website before making decisions — data changes each admissions cycle. Last updated: 2026-03-28. We aim to refresh this guide every year after new DfE data is published (typically June/July).