IP1 1TS Ipswich

Streets

• Cromwell Square, Ipswich: 15 addresses

Council tax

What each band costs in Ipswich in 2026-27: Band D £2,468 a year on average, including the police, fire and any county and parish charges.

Homes by band in the neighbourhood around this postcode: most are in band A (62% of about 1,140 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10; some small counts withheld), for the neighbourhood (census area of about 700 homes) around it, not just this postcode; Ministry of Housing, Communities and Local Government, council tax levels 2026-27. Bands are charged as fixed shares of Band D; the actual bill depends on the parish and on discounts such as the single-person discount. Check a home's own band with the official council tax band checker.

Planning and heritage

• Conservation area: yes, Central Conservation Area. Extensions, demolition, some windows and doors, and work on trees need consent.
• Listed buildings within 100 m of this postcode: 25.
• Article 4 direction (removing permitted development rights): Article 4 Direction for Small HMOs.
• Tree preservation orders: none recorded, though not every council has published theirs.
• Green belt: no.

Listed buildings

• The Willis Building, grade I
• UNITARIAN CHAPEL, grade I
• 1, SILENT STREET (See details for further address information), grade II*
• 3-9, SILENT STREET, grade II*
• 45 AND 45A, ST NICHOLAS STREET, grade II*
• CHURCH OF ST NICHOLAS, grade II*
• 10 AND 12, ST NICHOLAS STREET, grade II
• 14A AND 14, ST NICHOLAS STREET, grade II
• 15-17, SILENT STREET, grade II
• 16, ST NICHOLAS STREET, grade II
• 18 AND 20, ST NICHOLAS STREET, grade II
• 19 AND 21, ST NICHOLAS STREET, grade II
• 2, ST NICHOLAS STREET, grade II
• 22, ST NICHOLAS STREET, grade II
• 23, ST NICHOLAS STREET, grade II
• 24, ST NICHOLAS STREET, grade II
• 25, ST NICHOLAS STREET, grade II
• 27-31, ST NICHOLAS STREET, grade II
• 3 AND 5, FALCON STREET, grade II
• 33-37, ST NICHOLAS STREET, grade II
• 39, ST NICHOLAS STREET, grade II
• 4, ST NICHOLAS STREET, grade II
• 41 AND 43, ST NICHOLAS STREET, grade II
• 8, SILENT STREET, grade II
• SUN ALLIANCE OFFICES, grade II

Brownfield land registered for housing within 1.0 km

• 31 Princes Street IP1 1PU: up to 61 homes, permissioned (90 m)
• 38 Princes Street Ipswich IP1 1RJ: up to 5 homes, permissioned (140 m)
• 84 Princes Street, permissioned (220 m)
• 35-37 Elm Street: up to 12 homes, permissioned (220 m)
• 15 - 17 Arcade Street and 15 Museum Street, permissioned (230 m)
• 3-4 Lower Brook Mews: up to 6 homes, not permissioned (230 m)
• Land between Old Cattle Market and Star Lane: up to 40 homes, not permissioned (230 m)
• Land between Old Cattle Market and Star Lane, not permissioned (230 m)

Source: planning.data.gov.uk (Ministry of Housing, Communities and Local Government), compiled from councils and, for listed buildings, Historic England's National Heritage List. Conservation areas, Article 4 directions, tree preservation areas and the green belt are checked at each postcode's centre. Listed buildings and protected trees are counted within 100 m of this postcode. Councils publish Article 4 directions, tree preservation orders and brownfield registers to different standards, and some not yet. Planning applications are not here: there is no national open record of them yet.

Flood risk

Rivers, the sea or surface water: in this postcode, 0 addresses are in areas at high risk, 0 at medium risk and 7 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.

Rivers and the sea alone: no home is in an area at risk.

High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. Very low: under 0.1%. The rivers and sea figures allow for flood defences. Counts cover whole postcodes, which can include other streets.

Flood zone for planning: no postcode centre is in flood zone 2 or 3.

Sources: Environment Agency Flood risk: postcode search tool data (loaded 29 October 2026), Risk of Flooding from Rivers and Sea: postcodes in areas at risk (loaded 29 October 2026) and Flood Map for Planning (loaded 28 October 2026). Flood zones are checked at each postcode's centre point. These are models of areas, which their publishers say are not suitable for showing whether an individual property is at risk, and they do not cover flooding from sewers or drains. Check an address on the official long-term flood risk service.

Broadband

Superfast 92%, ultrafast 92%, gigabit 92% of premises; 0% cannot get 10 Mbit/s. Ofcom Connected Nations, data as at January 2026.