Rear & side extensions in Greenwich
Greenwich is Royal Borough of Greenwich's georgian terraces (maritime greenwich whs) + victorian terraces + post-war infill submarket. Maritime Greenwich UNESCO WHS buffer zone extends roughly 500m beyond the core inscribed area, so even an unlisted Victorian terrace in E.Greenwich can need a Heritage Impact Assessment for a roof dormer — adds £3,500-£6,000 to planning costs.
What a rear & side extensions project looks like here
Maritime Greenwich UNESCO WHS buffer zone extends roughly 500m beyond the core inscribed area, so even an unlisted Victorian terrace in E.Greenwich can need a Heritage Impact Assessment for a roof dormer — adds £3,500-£6,000 to planning costs.
Greenwich Park's Protected Vista from the Royal Observatory towards St Paul's (the Mayor's London View Management Framework) restricts roof-level extensions across a corridor through E.Greenwich that no amount of planning mitigation can unlock.
Crooms Hill has a concentration of Grade II* listings with original 1690s-1720s joinery and floorboards — a single replacement window here can require a bespoke LBC application with conservation-joiner detail drawings, 12-16 weeks.
Rear extensions, side-return infills, wraparound extensions — Permitted Development Class A rights or planning consent under the Article 4 borough overlay; Party Wall etc. Act 1996 notice on any party-wall touch. In Greenwich specifically, georgian terraces (maritime greenwich whs) + victorian terraces + post-war infill stock means rear & side extensions scope is shaped by the neighborhood's dominant construction typology. Baily's London scoping flow factors maritime greenwich unesco world heritage site buffer zone and greenwich park setting into the estimate before a contractor is involved.
Start your Greenwich scope — Baily asks the right questions.
Pre-seeded for rear & side extensions in Greenwich. Mention your 90-240 m² (970-2,580 sqft), your timeline, and any known constraints — Baily factors the royal borough of greenwich planning + building control 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
Greenwich rear & side extensions projects typically run $75K–$385K. Greenwich's georgian terraces (maritime greenwich whs) + victorian terraces + post-war infill stock, combined with maritime greenwich unesco world heritage site buffer zone, puts most mid-complexity projects in the $230K range. Baily scopes the exact band once you describe the work.
Nearest neighborhoods
Same service, adjacent London submarkets.