Letchworth Garden City SG6 is the world’s first Garden City, planned from 1903 — and it has a planning layer no other town Herts Build covers has. Most of the town falls under a Scheme of Management established under Section 19 of the Leasehold Reform Act 1967, meaning property owners need consent from the Letchworth Garden City Heritage Foundation for alterations, in addition to standard council planning permission where that applies.
Letchworth housing stock. The town is split into two design categories: a Heritage Character Area, where the original early-1900s garden-city houses sit with strict continuity requirements on materials, proportions, roofline and chimney detailing, and a Modern Character Area covering later-20th-century development, where design rules are more flexible.
Extensions and lofts in Letchworth. Any visible extension or loft conversion in the Heritage Character Area needs to match the existing brickwork, timber and slate detailing and keep the original roofline’s proportions — the Foundation’s design guidance is specific about this. In the Modern Character Area, projects proceed closer to standard Hertfordshire practice.
North Herts Council & Heritage Foundation Consent
Letchworth Garden City is administered by North Hertfordshire District Council for standard planning matters — but the Letchworth Garden City Heritage Foundation (successor to the original Letchworth Garden City Corporation, established 1995) manages a separate Scheme of Management under Section 19 of the Leasehold Reform Act 1967 across most of the town. In practice this means most homeowners need to apply to the Heritage Foundation for consent to alter their property, on top of any planning permission required from the council — a dual-consent process specific to Letchworth that the specialist factors into the project timeline from the outset.
Frequently Asked Questions
Do I need Heritage Foundation consent as well as planning permission in Letchworth?
In most cases, yes. Most of Letchworth Garden City falls under a Scheme of Management established under Section 19 of the Leasehold Reform Act 1967, administered by the Letchworth Garden City Heritage Foundation — this requires separate consent for alterations on top of any planning permission needed from North Hertfordshire District Council.
What's the difference between the Heritage Character Area and the Modern Character Area?
The Heritage Character Area covers the original early-1900s garden-city houses, with strict design continuity requirements on materials, proportions and roofline. The Modern Character Area covers later-20th-century development, where the Foundation's design rules are more flexible.
Which council handles standard planning in Letchworth?
North Hertfordshire District Council handles standard planning permission, but the Letchworth Garden City Heritage Foundation's Scheme of Management consent operates alongside it for most properties — both need factoring into a project timeline.
What materials does the Heritage Foundation expect on an extension?
The Foundation's design guidance asks for extensions and alterations to use materials that complement the existing brickwork, timber and slate detailing, and to maintain the proportions of the original roofline and chimneys.