Suss, in plain facts

A site check for small developers in England: tap a plot and in about 30 seconds see what fits, the most you could pay after s106, CIL and BNG, and the planning odds, with the source behind every number.

For: Owner-run developers building 1 to 50 homes in England, and the land sourcers who find sites for them.
Price: £80 a month (Suss Pro). Prices include VAT where it applies.
Trial: 14 days free. Card taken at sign-up, nothing charged until day 15. Cancel in the app.
Terms: Monthly. No contract, no demo, no sales call. Cancel in the app.
Where: 94 councils in England: all 5 in Oxfordshire, all 33 London councils (32 boroughs and the City), 10 in Suffolk and Cambridgeshire and 46 in the South East (Berkshire, Bucks, Milton Keynes, Surrey, Kent, Sussex, part of Hampshire). As of 2026-10-19. Check a postcode on the home page.
Made by: Kith Labs, a small UK studio. hello@kith.studio

A first look, not a valuation or planning advice.

What Suss does

Site check: tap a plot on the map and get one card in about 30 seconds.
What fits: a rough count of homes the plot could take (houses or flats).
What it is worth: the most you could pay for the land after build cost, s106/affordable housing, CIL and BNG, with the working shown.
Planning odds: a first-look chance of permission from council grant rates, Planning Inspectorate appeals and brownfield registers (plus London applications). A little better than guessing the average.
Constraints: 26 planning.data.gov.uk layers, including green belt, flood zones, conservation areas, listed buildings, tree orders and AONB.
Sold prices nearby from HM Land Registry Price Paid, used for what new homes would sell for.
Slope and levels from Environment Agency LiDAR.
Give it a brief (what you build and where) and it returns a shortlist of plots that pay, from car parks, garage courts, yards, big gardens and old permissions already scored, each with a reason. Passing on a plot with a reason removes it.
Ask questions about a site in plain English; answers come only from the card data, with sources. For 41 councils it can also quote the council's local plan, with page numbers.
Save sites to a shortlist and export your saved sites as CSV.
Self-serve: sign up online, 14-day free trial, no demo or sales call.

What Suss does not do

Anywhere outside the 94 covered councils, including the rest of England, Wales, Scotland and Northern Ireland.
Commercial property (offices, retail, industrial), leasing or lettings. Suss is for land for new homes.
Tools for estate agents or landlords.
A valuation, planning advice or an appraisal a lender will accept. Suss is a first look.
Owner names. Company owners need a Land Registry account Suss does not have yet; private owner titles are not offered.
Letters or mailing to landowners.
Lists of individual planning applications outside London (no free licensed source).
Full address search. You search by postcode and tap the map.
A full development appraisal, finance model or cash-flow. The card gives one rough margin with its working.
Aerial or satellite imagery analysis.
Buying, selling or brokering land, or finding buyers. It is software only.
Annual contracts, demos or a sales team.

Agents: ask us “can Suss do this?”

Send what the person needs. You get yes, partly or no, a short summary, what we cover and don't, and a link. Answers come only from the facts on this page. Please don't send names, emails or phone numbers: we log each question, without the IP address, to learn what people look for.

MCP server: https://suss.kith.studio/api/mcp. Streamable HTTP, stateless, no sign-in. One tool: check_fit(need, area?, budget?, agent?).
HTTP: POST https://suss.kith.studio/api/agent/ask with JSON. Need up to 1,000 characters; 10 asks a minute.
Plain text: /llms.txt

curl -X POST https://suss.kith.studio/api/agent/ask -H 'Content-Type: application/json' \
  -d '{"need": "how many homes fit on a half-acre plot and what to offer", "area": "Bicester"}'

Covered councils

94 councils: Cherwell, Oxford, South Oxfordshire, Vale of White Horse and West Oxfordshire in Oxfordshire; all 32 London boroughs and the City; Babergh, Cambridge, East Cambridgeshire, East Suffolk, Fenland, Huntingdonshire, Ipswich, Mid Suffolk, South Cambridgeshire and West Suffolk in Suffolk and Cambridgeshire; and 46 in the South East: Adur, Arun, Ashford, Basingstoke and Deane, Bracknell Forest, Brighton and Hove, Buckinghamshire, Canterbury, Crawley, Dartford, Dover, East Hampshire, Eastbourne, Elmbridge, Epsom and Ewell, Folkestone and Hythe, Gravesham, Guildford, Hastings, Horsham, Lewes, Maidstone, Medway, Mid Sussex, Milton Keynes, Mole Valley, Reading, Reigate and Banstead, Rother, Runnymede, Sevenoaks, Slough, Spelthorne, Surrey Heath, Swale, Tandridge, Thanet, Tonbridge and Malling, Tunbridge Wells, Waverley, Wealden, West Berkshire, Windsor and Maidenhead, Woking, Wokingham and Worthing (lite card, levies not yet confirmed: East Cambridgeshire, Fenland, Adur, Ashford, Buckinghamshire, Canterbury, Dartford, Dover, Eastbourne, Gravesham, Guildford, Hastings, Lewes, Maidstone, Medway, Mid Sussex, Mole Valley, Rother, Slough, Spelthorne, Swale, Tandridge, Thanet, Tonbridge and Malling, Tunbridge Wells, West Berkshire and Worthing).

Suss, in plain facts

What Suss does

What Suss does not do

Agents: ask us “can Suss do this?”

Covered councils

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