Annexe / outbuilding in Oval
Oval is London Borough of Lambeth's late georgian and regency (1810-1840) kennington park-edge terraces submarket. The Duchy of Cornwall holds the freehold on roughly 120 properties around Kennington Park including parts of Kennington Oval, so projects need a parallel Duchy Estate Consent on top of Lambeth planning; the Duchy review tends to be stricter on visible elevational changes than Lambeth and adds 4-8 calendar weeks.
What a annexe / outbuilding project looks like here
The Duchy of Cornwall holds the freehold on roughly 120 properties around Kennington Park including parts of Kennington Oval, so projects need a parallel Duchy Estate Consent on top of Lambeth planning; the Duchy review tends to be stricter on visible elevational changes than Lambeth and adds 4-8 calendar weeks.
Surrey County Cricket Club's Kia Oval ground holds Sport England statutory consultee status, so any planning application within 200m that could affect floodlight throw or matchday access triggers a Sport England consultation, adding roughly 4-6 weeks to determination.
The late-Georgian terraces along Kennington Park Road have shallow brick footings at 0.7-0.9m on London Clay, so any basement excavation under Lambeth's Q1 policy almost always triggers Party Wall Act underpinning notices on both flanks.
Garden annexes, ancillary outbuildings and granny annexes — Permitted Development under Class E where the borough hasn't issued an Article 4 Direction; planning consent otherwise. In Oval specifically, late georgian and regency (1810-1840) kennington park-edge terraces stock means annexe / outbuilding scope is shaped by the neighborhood's dominant construction typology. Baily's London scoping flow factors kennington park conservation area covers the park-edge stock and duchy of cornwall freehold on ~120 kennington park properties into the estimate before a contractor is involved.
Start your Oval scope — Baily asks the right questions.
Pre-seeded for annexe / outbuilding in Oval. Mention your 85-200 m2 (915-2,150 sqft), your timeline, and any known constraints — Baily factors the lambeth building control + lambeth planning service review queue into the scope.
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Who is Baily?
Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.
He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.
That’s what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner’s real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.
Baily was a businessman before he was a scientist. That’s our vibe too.
Questions LA homeowners actually ask
Oval annexe / outbuilding projects typically run $95K–$285K. Oval's late georgian and regency (1810-1840) kennington park-edge terraces stock, combined with kennington park conservation area covers the park-edge stock, puts most mid-complexity projects in the $190K range. Baily scopes the exact band once you describe the work.
Nearest neighborhoods
Same service, adjacent London submarkets.