Loading…
These only choose where you start. Every page and every lens is still one tap away.
Sign in to keep them on every device →Loading…
What can I build, and will it pay? The planning rules, what neighbours have built, planning decisions, energy upgrades, and whether extending pays.
| Brook Street & Pilgrim's Hatch | Brentwood | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 4% | 8% | 10% |
| Postcodes under an Article 4 direction | 0% | 0% | 16% |
| Listed buildings | 53 | 47 | 12 |
| Postcodes in a tree preservation order zone | 0% | 0% | 3% |
| Flats | 13% | 21% | 22% |
| Building | Grade | Distance |
|---|---|---|
| Langtons | II | 380 m |
| Halfway House Farm | II | 450 m |
| Langtons Forge | II | 530 m |
Grade I and II* are the most important few per cent. Listing means consent is needed for most changes, inside and out. Contains Historic England data © Historic England 2026 (via planning.data.gov.uk), OGL.
planning.data.gov.uk (OGL), Historic England. The rules at one address are on its postcode's Improving page. General guidance, not planning advice.
| Home | Work | Seen | Space added | Rooms |
|---|---|---|---|---|
| 13, Porters Close | Extension | 2025 | +8 m² | 6 → 6 |
| 2, Greenshaw | Extension | 2023 | +42 m² | 3 → 5 |
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
From energy certificates: an extension where a later certificate shows more floor space, a loft conversion where roof rooms appear.
Planning applications outside London aren't published as open data yet, so search the council's own register: the drawings, the decision and the agent are there. Find the council's planning register on GOV.UK ↗
| Brook Street & Pilgrim's Hatch | Brentwood | England and Wales | |
|---|---|---|---|
| Rated A or B | 5% | 10% | 12% |
| Rated E, F or G | 20% | 16% | 16% |
| Homes on mains gas | 90% | 89% | 86% |
| Gas use per home (kWh a year) | 15,213 | 15,019 | 11,043 |
| Households in fuel poverty | 8% | 8% | 10% |
| Homes built before 1919 | 9% | 11% | 20% |
A home's own recommended upgrades and their costs are on its energy certificate, shown on its page.
MHCLG energy certificates; DESNZ fuel poverty.
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); in East of England, 11.6% (14,120 resales).
Rough build costs and resale evidence, not quotes or a valuation. How extensions pay off by size, type and region.
The money you don't get back either way, for the same extra space in Brook Street & Pilgrim's Hatch.
| Stamp duty on the new home | £21,050 |
|---|---|
| Estate agent on yours 1.2% + VAT | £7,344 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £33,494 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£66,600 |
| Money gone | −£9,100 |
On these figures, extending loses about £42,594 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.
Where people extend most, and where the planning rules are tighter.
| Shenfield & Hutton Mount | 48.4 | 0% | 0% | 24 | 10% |
|---|---|---|---|---|---|
| Kelvedon Hatch & Doddinghurst | 41.4 | 2% | 0% | 152 | 6% |
| Herongate, Ingrave & West Horndon | 38.8 | 5% | 0% | 43 | 6% |
| Ingatestone & Mountnessing | 38.4 | 24% | 0% | 123 | 13% |
| Brook Street & Pilgrim's Hatch (this one) | 37.9 | 4% | 0% | 53 | 5% |
| Brentwood North | 37.3 | 5% | 0% | 0 | 8% |
| Hutton | 31.7 | 3% | 0% | 19 | 4% |
| Brentwood South & Warley | 20.2 | 3% | 0% | 59 | 13% |
| Brentwood Central | 17.7 | 24% | 0% | 47 | 17% |
Sort by any column; open a neighbourhood for the same view.
| Neighbourhood | Council | England and Wales | |
|---|---|---|---|
| Homes with solar panels | 0.6% | 0.7% | 1.2% |
| Heated by a heat pump | 0.6% | 1.6% | 1.0% |
| Mains gas | 85.7% | 86.1% | 84.0% |
| Oil or LPG | 0.6% | 1.0% | 4.1% |
| Electric heating | 13.0% | 10.8% | 8.3% |
| Community heating | 0.1% | 0.3% | 2.1% |
From each home's latest energy certificate, so panels or heat pumps fitted since aren't counted and the shares are lower than today's real figures. Compare areas in the data explorer.