Improving on Jessamine Road

What you could build on Jessamine Road: 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 Hanwell, Ealing.

132extensions seen within 600 m in the last 10 years

16loft conversions within 600 m in the last 10 years

85%of 110 householder applications nearby approved (since 2023)

98.7extensions 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.
Not in a conservation area (from council registers).
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
55, Montague Road	Extension	2026	+21 m²	57 m² → 78 m²	–	233 m
32, Deans Road	Extension	2026	+51 m²	81 m² → 132 m²	5 → 6	278 m
24a, Laurel Gardens	Extension	2026	+26 m²	46 m² → 72 m²	–	285 m
52, Station Road	Extension	2026	+29 m²	121 m² → 150 m²	–	296 m
3, Station Road	Extension	2026	+131 m²	83 m² → 214 m²	5 → 4	303 m
34, York Avenue	Extension	2026	+13 m²	140 m² → 153 m²	5 → 5	308 m

Planning applications nearby

Address	Work	Outcome	Decided	Drawings and agent
65, Oaklands Road, W7 2dt	Other householder work	Under consideration	–	262982HH
14, Lawn Gardens, W7 3jn	Rear extension	Approved	Sept 2026	262745HH
39, St Dunstans Road, W7 2ey	Side return or wrap-around	Under consideration	–	262437HH
21, Studley Grange Road, W7 2lu	Rear extension	Approved	Aug 2026	262449HH
38, Laurel Gardens, W7 3jg	Rear extension	Approved	Aug 2026	262327HH
19, Lower Boston Road, W7 3tx	Other householder work	Under consideration	–	262195HH
58, Studley Grange Road, W7 2lx	Rear extension	Approved	Jul 2026	262175HH
18, Jessamine Road, W7 3sq	Rear extension	Approved	Jun 2026	261564HH

How often householder applications are approved

Work	Hanwell	Ealing	London	Typical decision time
All householder applications	84% (100)	80% (3937)	80%	8 weeks
Loft or dormer	88% (25)	85% (959)	81%	8 weeks
Rear extension	90% (39)	73% (1365)	79%	7 weeks
Two-storey extension	50% (10)	79% (411)	72%	8 weeks
Other householder work	86% (7)	66% (250)	70%	8 weeks
Side return or wrap-around	100% (10)	92% (331)	88%	8 weeks
Windows, doors or cladding	–	90% (176)	90%	8 weeks
Outbuilding or garden room	–	86% (179)	79%	8 weeks
Side extension	–	85% (74)	86%	8 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 Hanwell.

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 £819,000)

Stamp duty on the new home	£30,950
Estate agent on yours 1.2% + VAT	£9,720
Solicitors, buying and selling	£3,000
Survey	£600
Removals	£1,500
Money gone	£45,770

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	−£86,400
Money gone	−£28,900

On these figures, extending loses about £74,670 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…