Plain-English glossary
UK Land Development Definitions
A friendly reference for landowners, self-builders and anyone new to UK residential land development. Every term written out, with enough context to be useful — not just a one-line dictionary entry.
How to use this page
Skim the table of contents below to jump to a section, or just scroll. A handful of the most important terms — the ones that come up again and again in real deals — have their own dedicated pages with worked examples and deeper explanation. They're marked with an arrow → next to the term.
Nothing here is legal or planning advice; it's a friendly orientation. When you're making real decisions, talk to a planning consultant, solicitor or chartered surveyor.
Detailed guides
Section 01
Land & ownership
How land is held, what's recorded on the title, and the rights and restrictions that can affect what you're allowed to do with it.
- Freehold
- Outright ownership of the land and any buildings on it, with no time limit. The freeholder controls the land subject to planning law, covenants and statutory rights. Almost all houses sold in England are freehold; flats are usually leasehold.
- Leasehold
- Ownership of a property for a fixed number of years, after which the property reverts to the freeholder. Leaseholders pay ground rent and service charges and may need the freeholder's consent for alterations. Most flats and a small number of houses are sold on this basis.
- Title(HM Land Registry title)
- The official record of who owns a piece of land, the extent of that ownership, and any rights and burdens registered against it. You can buy the title register and title plan from HM Land Registry for a few pounds — they're the first thing any solicitor or developer will look at.
- Title plan
- The Ordnance Survey-based map attached to the title register, showing the land in red edging. It defines the legal boundary in general terms, not centimetre-perfect — historic features on the ground often differ slightly.
- Easement
- A right one piece of land enjoys over another — for example a right of way across a neighbour's drive, a right to run a drain through their field, or a right of light. Easements pass with the land when it's sold and can be the difference between a developable plot and a landlocked one.
- Restrictive covenant
- A binding promise — usually given to a previous seller — that restricts how the land can be used. Common examples: "no more than one dwelling on this plot" or "no commercial use". Old covenants can sometimes be lifted by the Upper Tribunal or insured around, but they can stop or reshape a development.
- Right of way
- A right to cross someone else's land. Can be private (granted as an easement) or public (a footpath, bridleway or byway recorded on the definitive map). Public rights of way can usually be diverted but only via a formal legal process.
- Ransom strip
- A thin sliver of land controlled by someone else that sits between your site and the highway, or between your site and a vital service. The owner of the strip can demand a substantial share of the uplift in return for releasing it — historically around a third (the so-called "Stokes v Cambridge" share).
- Overage(clawback)
- A clause in a sale contract entitling the seller to a further payment if the buyer later gets a more valuable planning permission or sells on at a profit. Overage is common when farmers sell land where future planning is uncertain — it lets the seller share in the uplift without delaying the sale.
- Red line plan
- A plan submitted with a planning application showing the application site outlined in red, and any additional land controlled by the applicant outlined in blue. The red line defines what the permission, if granted, will actually cover.
Section 02
Land value & pricing
How residential land gets valued, the jargon valuers use, and the levers that turn a paddock into a price.
- Existing Use Value (EUV)
- What the land is worth in its current, lawful use — typically agricultural, paddock or amenity. Agricultural EUV is usually a few thousand pounds an acre. EUV is the floor under any negotiation; everything above it is "hope" or planning value.
- Hope valueFull guide
- The premium a buyer is willing to pay above existing use value because there is a realistic prospect — though not yet a permission — of more valuable future development. The stronger the planning prospects, the higher the hope value.
- Market value
- The price the land would fetch in an open, arm's-length sale on the valuation date, as defined by the RICS Red Book. For land with a permission this is close to residual land value; for land without one, it's typically EUV plus hope value.
- Gross Development Value (GDV)
- The total sale value of all the homes that would be built on the site if developed — i.e. what the finished houses would sell for in total. GDV is the headline figure every residual valuation starts with.
- Residual land value(residual valuation)
- The standard way developers value land: start with GDV, subtract build costs, professional fees, finance, marketing, contingency and a 20–25% profit margin — whatever's left is what they can pay for the land. Small changes in assumptions can shift the residual figure dramatically.
- Comparable evidence(comps)
- Records of recent sales of similar land or finished homes nearby, used to triangulate value. Land valuers rely on comps for GDV inputs; finding genuinely comparable land transactions is much harder because each site is unique.
- Planning uplift
- The increase in value that comes from securing a planning permission. An acre of agricultural land worth £10k can become a residential acre worth £500k–£1m+ — that gap is the planning uplift, and it's why option and promotion agreements exist.
- Section 14 / 14A of the Land Compensation Act 1961
- The statutory rules used when councils compulsorily purchase land — they govern how (and whether) hope value is paid. Recent reforms allow some hope value to be disregarded in CPOs for affordable housing, education and health.
- Stamp Duty Land Tax (SDLT)
- The tax a buyer pays when buying land or property in England and Northern Ireland. Rates and reliefs vary depending on whether the land is residential, mixed-use or non-residential — the classification matters a lot when buying a plot with a paddock attached.
Section 03
Deal structures
The contracts developers, promoters and landowners use to share risk, reward and timing when planning isn't yet in place.
- Option agreementFull guide
- The developer pays a small fee for the right — but not the obligation — to buy your land at a pre-agreed price (or formula) within a fixed period, usually after they have secured planning. You're locked in; they can walk away.
- Promotion agreementFull guide
- A land promoter takes your site through planning at their cost and risk; once permission is granted, the land is sold on the open market and you split the net proceeds. You stay the seller and keep alignment of interests, but the promoter takes 15–25% of net.
- Conditional contract(subject to planning)
- A binding sale contract that only completes if a specified planning permission is obtained by a deadline. Cleaner than an option for the seller because there's a commitment to buy, but the conditions still need to be met.
- Unconditional contract
- A normal sale: contracts exchange, money flows, completion happens — no planning conditions, no get-outs. Rare for development land because the buyer is taking 100% of the planning risk.
- Joint venture (JV)
- Landowner and developer (or builder) form a partnership — typically a special purpose vehicle (SPV) — and share the profits. Used where the landowner wants more upside than an option offers but doesn't want to fund the build themselves.
- Serviced plots
- Plots sold to individual self-builders with planning, roads, drainage and utilities already in place — the buyer just builds the house. Selling serviced plots typically delivers 50–100% more than a comparable developer offer because the landowner keeps the developer's margin.
- Land assembly
- Combining several separately-owned parcels into one developable site. Often involves options across multiple owners, with completion triggered when planning lands on the whole assembled area.
- Subject to contract (STC)(under offer)
- A label on negotiations or marketing meaning "we've agreed terms, but nothing is legally binding yet." In England, either side can usually walk away until exchange of contracts.
Section 04
Types of planning permission
The different forms a planning consent can take, and the routes that exist between full applications and permitted development.
- Outline planning permission
- Establishes the principle of development — typically use, scale and access — but leaves the design detail to a later "reserved matters" application. Cheaper to apply for than full permission and useful when you want to test whether something is acceptable before committing to detailed design.
- Full planning permission
- A permission that covers every detail — siting, scale, design, materials, landscaping. You can implement it directly without further consents (subject to discharging any pre-commencement conditions).
- Reserved matters
- The details left out of an outline permission — usually appearance, landscaping, layout and scale. A reserved matters application must usually be submitted within 3 years of the outline, and development must usually start within 2 years of reserved matters being approved.
- Permission in Principle (PiP)Full guide
- A streamlined two-stage consent route for small housing sites. A PiP application establishes the principle of housing on a site (use, location, amount); a follow-up Technical Details Consent deals with the design. Faster and cheaper than outline.
- Technical Details Consent (TDC)
- The second-stage application that follows Permission in Principle. It must comply with the parameters set in the PiP — if it does, the council has limited grounds to refuse it.
- Permitted Development Rights (PDR)
- A national grant of planning permission for certain types of development — extensions within set limits, change of use under Class Q (agricultural to residential), Class MA (commercial to residential) and similar. Some require "prior approval" before you can start.
- Class Q
- The permitted development right that allows certain agricultural buildings to be converted to dwellings without a full planning application. Recently widened — but constrained by size, location and the building's structural condition. Requires prior approval from the council.
- Class MA
- Permitted development allowing commercial, business and service (Class E) buildings to change to residential use. Subject to a floorspace cap and prior approval covering issues like flooding, contamination, daylight and noise.
- Prior approval
- A lighter-touch consent process used for many permitted development rights. The council can only consider specific matters listed in the legislation (e.g. flooding, transport), not the principle of development.
- Lawful Development Certificate (LDC)(CLEUD / CLOPUD)
- A council certificate confirming that an existing use or building (CLEUD), or a proposed use/works (CLOPUD), is lawful — i.e. doesn't need planning permission, or has become immune from enforcement through the passage of time. Useful for cleaning up uncertainty before a sale.
- Discharge of conditions
- The formal process of submitting details required by planning conditions and getting the council to sign them off. Pre-commencement conditions (those that must be discharged before work starts) are particularly important — start building before they're discharged and your permission can be invalidated.
Section 06
Designations & constraints
The labels attached to land that change how easy or hard it is to develop. Almost every small site has at least one.
- Green Belt
- A statutory designation around major urban areas designed to prevent sprawl. Most new building in the Green Belt is "inappropriate" and requires "very special circumstances" to justify — a high bar. Don't confuse with greenfield (which is just any undeveloped land).
- AONB(National Landscape)
- Area of Outstanding Natural Beauty — landscapes designated for their scenic quality. Rebranded as "National Landscapes" in 2023. Major development is restricted and design scrutiny is higher, but small-scale housing is often possible.
- Conservation Area
- An area designated for its architectural or historic interest — typically a village core or historic neighbourhood. Permitted development rights are restricted, demolition needs consent, and design has to fit the character.
- Listed building
- A building of special architectural or historic interest, recorded on the National Heritage List. Grade I (highest), Grade II*, Grade II. Listed building consent is required for any internal or external alteration affecting character — even painting a front door the wrong colour can technically need consent.
- Curtilage
- The land closely associated with a building — typically the garden of a house. Listed building protection can extend to structures within the curtilage; permitted development for extensions only applies within it.
- Tree Preservation Order (TPO)
- A legal order protecting a specific tree, group of trees or woodland from cutting, lopping or felling without council consent. Breach is a criminal offence with fines per tree.
- SSSI
- Site of Special Scientific Interest — protected for wildlife, geology or landforms. Development affecting an SSSI is heavily scrutinised by Natural England.
- Article 4 Direction
- A council order removing certain permitted development rights in a specific area. Common in conservation areas — small changes (windows, roofs, fences) that would normally be permitted now need full planning permission.
- Flood Zones
- Environment Agency maps grading land by flood risk: Zone 1 (low), Zone 2, Zone 3a (high), Zone 3b (functional floodplain). Housing in Zone 3 is heavily restricted; the "sequential" and "exception" tests have to be passed.
- Greenfield
- Land that has never been built on (or where buildings are negligible). Not the same as Green Belt. Most countryside is greenfield; not all greenfield is Green Belt.
- Brownfield(Previously Developed Land (PDL))
- Land that has been previously developed — old industrial sites, redundant farmyards, scrapyards. The NPPF gives strong policy support to reusing brownfield land for housing, even outside settlement boundaries.
Section 07
Levies & contributions
The taxes, charges and obligations that come with a planning permission — and shave the residual land value down.
- Section 106 agreement(S106 / planning obligation)Full guide
- A legal agreement between the developer and council, attached to the permission, that requires specific contributions — affordable housing, school places, highways works, open space maintenance. S106 obligations run with the land.
- Community Infrastructure Levy (CIL)
- A per-square-metre charge councils can apply to new development to fund infrastructure. Self-builders get a full exemption if they apply correctly and live in the home for at least 3 years.
- Biodiversity Net Gain (BNG)Full guide
- A statutory requirement (since 2024) that most new developments deliver at least 10% more biodiversity than was on the site before. Delivered on-site, off-site, or via biodiversity credits as a last resort.
- Nutrient neutrality
- A constraint in some catchments where any new housing must offset its nitrogen or phosphorus load to protect designated water bodies. Has stalled tens of thousands of homes in affected areas; mitigation is bought from third-party schemes.
- Water neutrality
- Similar in spirit to nutrient neutrality but for water abstraction — currently applies in parts of the South East. New homes must offset their water demand.
- Affordable housing contribution
- A requirement (via S106) that a proportion of homes on a site — typically 30–40% on larger schemes — are delivered as affordable rent, shared ownership or First Homes. Most small sites fall below the threshold and are exempt.
- First Homes
- Government-defined affordable product — new-build homes sold at a minimum 30% discount to market value, with priority for local first-time buyers and key workers. The discount stays with the property in perpetuity.
Section 08
Self-build & custom build
The specific rules, registers and policies that apply to people building their own home — and the landowners selling them plots.
- Self-Build and Custom Housebuilding Act 2015(Right to Build)
- The statute that obliges English councils to keep a register of people wanting to build their own home, and to grant enough planning permissions to meet that demand within three years of each "base period". Underpins most self-build planning arguments.
- Self-build register
- The list each council keeps of eligible people seeking serviced plots. Most are split into Part 1 (locally-connected applicants the council must serve) and Part 2 (others). A council failing to meet its Part 1 demand is a strong material consideration on appeal.
- Custom build
- A home commissioned by a future occupier but delivered with significant developer involvement — typically the developer handles infrastructure, planning and shell, and the buyer picks layouts, finishes and sometimes designs. Counts towards the Self-Build Register duty.
- Section 1 housing duty
- The duty under the 2015 Act for councils to grant suitable permissions for serviced plots to match register demand. Often overlooked, frequently breached, and a powerful argument in self-build planning appeals.
- Plot passport
- A short, council-approved summary of what can be built on a specific serviced plot — site plan, height/footprint limits, materials, design rules. Used by councils and developers to streamline custom-build sites.
- Affordable self-build
- Serviced plots sold at a discount (typically 20%+ off market value) to income-qualified local applicants — a parallel to traditional affordable housing tenures but with the buyer building the house themselves.
Section 09
Application process & documents
The mechanics of getting a permission — and the package of reports that goes in with the application.
- Validation
- The council's check that a planning application is complete and includes everything on the local validation list. The clock for determination only starts once the application is validated.
- Determination period
- The statutory time the council has to decide an application — 8 weeks for most householder and minor applications, 13 weeks for major applications. In practice almost always extended by agreement.
- Extension of Time (EOT)
- A written agreement to extend the council's determination period. Refusing all EOTs is a tactic to preserve a right to appeal for non-determination; agreeing them usually leads to a better-considered decision.
- Decision notice
- The council's formal written decision — approval (often with conditions and reasons) or refusal (with numbered reasons). The reasons drive any appeal.
- Section 78 appeal
- An appeal against refusal (or non-determination, or unacceptable conditions) made to the Planning Inspectorate under s.78 of the Town and Country Planning Act 1990. Most go via written representations; some via hearing or inquiry.
- Non-determination appeal
- An appeal made because the council hasn't decided within the statutory period (and no EOT has been agreed). The appeal then deals with the merits as if the council had refused.
- Planning Inspectorate (PINS)
- The independent government body that decides planning appeals (on behalf of the Secretary of State). Inspectors are experienced planners who hear cases by written reps, hearing or inquiry.
- Design & Access Statement (DAS)
- A document submitted with major and design-sensitive applications, explaining the design rationale and how the development will be accessible to all users. Mandatory for most non-householder applications.
- Planning Statement
- A written case explaining how a proposal accords with national and local policy — effectively the legal argument for granting permission. Optional but valuable on anything contentious.
- Heritage Statement
- An assessment of how a proposal affects nearby heritage assets — listed buildings, conservation areas, scheduled monuments, the historic landscape. Required wherever heritage assets might be affected.
- Preliminary Ecological Appraisal (PEA)
- The first-stage ecology report on a site — habitats, evidence of protected species, recommendations for further survey. Usually triggers Phase 2 surveys (bats, great crested newts, badgers, reptiles) if anything is found.
- Tree survey (BS5837)
- A survey of trees on or near the site to the British Standard, identifying which can be retained, which need protecting during construction, and which justify removal. Almost always required where any mature tree is nearby.
- Topographical survey
- A measured plan of the ground levels, boundaries and features of the site. The foundation document for any architect's design work — get this done early.
- Flood Risk Assessment (FRA)
- A site-specific assessment of flood risk and how the proposal mitigates it. Required for any site in Flood Zone 2 or 3, sites over 1 hectare, or sites with known surface-water issues.
- Drainage strategy / SuDS
- A statement of how surface water and foul drainage will be handled, increasingly using Sustainable Drainage Systems (SuDS) — soakaways, swales, ponds — rather than connecting to overloaded sewers.
Section 10
Build & construction
Once you've got planning, a separate parallel world of regulation kicks in — building control, warranties and party walls.
- Building Regulations
- The technical standards covering structure, fire safety, energy, ventilation, accessibility and so on. Separate from planning — even a permitted development project needs Building Regs approval. Signed off by Building Control (the council's or an approved inspector).
- CDM Regulations
- The Construction (Design and Management) Regulations 2015, which set health and safety duties on every project — including a duty on self-builders if you're commissioning the work. You'll need to appoint a Principal Designer and Principal Contractor on most jobs.
- Structural warranty
- A 10-year insurance policy against major structural defects in a new home (NHBC, LABC, Premier, Protek, etc.). Required to mortgage or sell a new build in the conventional market; ensures buyers can get a mortgage.
- Party Wall Act
- The Party Wall etc. Act 1996 governs works affecting a shared wall, a wall on a boundary, or excavations near a neighbour's building. Notices must be served before work starts; failure triggers injunctions and disputes.
- Self-build VAT reclaim
- The DIY Housebuilders' Scheme lets self-builders reclaim VAT on materials and certain services on a new home or qualifying conversion. Strict deadlines and evidence rules — get the process set up before the first invoice.
Want to go deeper?
These guides expand on the most important terms with worked examples and the trade-offs that matter in a real deal.
Hope value→Permission in Principle→Biodiversity Net Gain→Option agreement→Promotion agreement→Section 106→
Or head back to the Tools & Guidance hub.