Improving on Grosvenor Terrace

What you could build on Grosvenor Terrace: the planning rules at this address, what neighbours have built and how big, planning decisions nearby, rough costs and the value an extension adds, and how to get started. In Burgess Park West & John Ruskin Street, Southwark.

Postcodes on Grosvenor Terrace

Checks tied to a spot (flood, radon, ground, noise, distances) are measured at SE5 0NL, where most of the street's homes are. A long street can differ from end to end: open a postcode for its own improving page.

SE5 0NL · 26 homes SE5 0DD · 20 homes SE5 0NN · 19 homes SE5 0NW · 16 homes SE5 0NP · 10 homes

66extensions seen within 600 m in the last 10 years

6loft conversions within 600 m in the last 10 years

97%of 33 householder applications nearby approved (since 2023)

86.7extensions per 1,000 homes in the neighbourhood (10 years)

● work seen on energy certificates · ● application approved · ● refused · ● pending or other · ● this postcode

The rules at this address

Mostly flats at this postcode. Flats have no permitted development rights, so almost any extension or loft conversion needs planning permission, and the freeholder's consent under the lease.
In the Grosvenor Park conservation area: permitted development is narrower (for example no side extensions or roof cladding), and demolition and works to trees need consent.
No Article 4 direction recorded for this postcode.
Listed buildings need listed building consent for most changes, inside and out: check the National Heritage List.
To be certain work is permitted development, apply for a lawful development certificate (about £129 for householders in England). Building regulations apply either way.

What neighbours have built

Home	Work	Seen	Space added	Floor area	Rooms	Distance
Flat C, 47, Grosvenor Terrace	Extension	2026	+15 m²	72 m² → 87 m²	–	60 m
222, Hillingdon Street	Extension	2026	+25 m²	46 m² → 71 m²	–	161 m
45d, Grosvenor Park	Loft conversion	2026	–	86 m² → 78 m²	3 → 3	162 m
Flat 9, Trevelyan House, John Ruskin Street	Extension	2026	+26 m²	68 m² → 94 m²	–	238 m
Flat 7, 3, Bethwin Road	Extension	2026	+17 m²	45 m² → 62 m²	–	284 m
Flat 16, Aberfeldy House, John Ruskin Street	Extension	2026	+10 m²	86 m² → 96 m²	4 → 4	321 m

Planning applications nearby

Address	Work	Outcome	Decided	Drawings and agent
54, Lorrimore Road, Se17 3lz	Loft or dormer	Under consideration	–	26/AP/2911
26, Fleming Road, Se17 3qr	Rear extension	Under consideration	–	26/AP/2766
48, Lorrimore Road, Se17 3lz	Windows, doors or cladding	Under consideration	–	26/AP/2768
125, Camberwell Road, Se5 0hb	Windows, doors or cladding	Under consideration	–	26/AP/2233
125, Camberwell Road, Se5 0hb	Other householder work	Under consideration	–	26/AP/2235
125, Camberwell Road, Se5 0hb	Windows, doors or cladding	Under consideration	–	26/AP/2243

How often householder applications are approved

Work	Burgess Park West & John Ruskin Street	Southwark	London	Typical decision time
All householder applications	87% (23)	92% (2175)	80%	7 weeks
Loft or dormer	–	94% (980)	81%	7 weeks
Rear extension	100% (6)	92% (365)	79%	7 weeks
Two-storey extension	–	83% (83)	72%	8 weeks
Other householder work	–	80% (171)	70%	7 weeks
Side return or wrap-around	–	98% (208)	88%	7 weeks
Windows, doors or cladding	–	90% (110)	90%	7 weeks
Outbuilding or garden room	–	82% (77)	79%	7 weeks
Side extension	–	99% (68)	86%	7 weeks
Garage conversion or garage

Cost and the value it adds

Across England and Wales, homes extended by a typical 30 m² and then resold rose about 11.1% more than similar homes nearby over the same years (124,884 resales). How extensions pay off by size, type and region.

Single-storey rear or side extension: about £2,000–£3,000 per m² (London £2,500–£4,000), plus fees and VAT
Loft conversion: about £45,000–£75,000 for a dormer; more for a mansard or hip-to-gable
Two-storey extension: about £1,800–£2,800 per m² of new floor
Garage conversion: about £15,000–£30,000
Basement: about £3,500–£5,000 per m², London mostly

Build costs are rough 2026 ranges from industry guides, not quotes. Get three quotes for your plans.

Move or improve?

The money you don't get back either way, for the same extra space in Burgess Park West & John Ruskin Street.

Your home is worthExtra space you need (m²)Homes here sell for, per m²Building cost per m²Share of that an extension adds (%)

Move to a home 20 m² bigger (about £572,000)

Stamp duty on the new home	£18,600
Estate agent on yours 1.2% + VAT	£6,408
Solicitors, buying and selling	£3,000
Survey	£600
Removals	£1,500
Money gone	£30,108

Extend by 20 m²

Building, plus 15% for design, planning and contingency	£57,500
Less what it adds to your home's value 60% of the local price	−£76,200
Money gone	−£18,700

On these figures, extending loses about £48,808 less. Moving also changes the area, the schools and the commute; extending means months of building work and depends on planning.

Building costs vary a lot (a single-storey rear extension is often £2,000–£3,000 per m², more in London). How much space adds depends on the home and street: what extensions added to resale prices. A guide, not advice; nothing you type leaves this page.

Getting started

Look at what neighbours did. Open applications above to see drawings that were approved on similar houses, and who designed them.
Check the route: permitted development (with a lawful development certificate), prior approval for larger rear extensions, or full householder planning permission.
Get a measured survey and a designer: an architect, an architectural technologist or a designer who handles planning drawings.
Apply (householder permission is about £258 in England; councils aim to decide within 8 weeks).
Building regulations through the council's building control or an approved inspector, and party wall notices to neighbours if you build on or near the boundary.
Choose a builder: written quotes, a contract, staged payments, and check their insurance and references.

Find help: RIBA Find an Architect ↗ · CIAT architectural technologists ↗ · TrustMark tradespeople ↗ · Federation of Master Builders ↗ · Planning Portal guides ↗

General guidance, not planning or legal advice. Fees and rules as checked in October 2026; confirm with the council.

Energy certificates: MHCLG (OGL). Planning applications: GLA Planning London Datahub. Conservation areas and Article 4: planning.data.gov.uk (OGL).

Go deeper

Looking along the street…