Why Understanding Property Jargon Matters
Buying your first home is exciting, but it can also feel like everyone around you is speaking a different language. From your mortgage broker mentioning “LTV ratios” to your solicitor discussing “Section 38 agreements,” the property world is packed with terminology that can leave first-time buyers feeling overwhelmed.
This is especially true when you are buying a new build home. On top of the usual mortgage and legal jargon, there is an entire vocabulary specific to new developments — terms like snagging, defect liability period, NHBC Buildmark, and mortgage retention that you simply would not encounter when buying an older property. Understanding these terms is not just about sounding knowledgeable — it is about protecting yourself, making informed decisions, and feeling confident throughout the process.
This jargon buster is your go-to reference guide. We have organised every term you are likely to encounter into clear categories, with plain-English definitions and explanations of why each one matters. Bookmark this page and use it alongside our step-by-step buying timeline to navigate the process with confidence.
Mortgage & Finance Terms
The mortgage process comes with its own dense vocabulary. Here is your complete guide to the financial jargon you will encounter when securing a mortgage for a new build home.
| Term | Also Known As | What It Means | Why It Matters |
|---|---|---|---|
| AIP / DIP | Agreement in Principle / Decision in Principle | A preliminary indication from a lender that they would be willing to lend you a specific amount, based on basic checks of your income and credit | Most developers require an AIP before accepting a reservation. It shows you are a serious buyer |
| Mortgage Offer | Formal Offer | The official, legally binding document from the lender confirming they will lend you the agreed amount under specific terms | You cannot exchange contracts without a valid mortgage offer. Offers typically last 3–6 months |
| LTV | Loan-to-Value Ratio | The percentage of the property’s value that you are borrowing. A £180,000 mortgage on a £200,000 home is 90% LTV | Lower LTV means better interest rates. First-time buyers typically borrow at 85–95% LTV |
| Fixed Rate | – | A mortgage where the interest rate stays the same for an agreed period (commonly 2 or 5 years), regardless of base rate changes | Gives you certainty over monthly payments during those crucial first years of ownership |
| Variable Rate | Tracker / Discount | A mortgage where the interest rate can change. Tracker rates follow the Bank of England base rate; discount rates sit below the lender’s SVR | Payments can go up or down, offering potential savings but less certainty |
| SVR | Standard Variable Rate | The lender’s default interest rate that you revert to when your initial fixed or tracker deal ends | SVRs are almost always higher than deal rates. Remortgage before your deal ends to avoid overpaying |
| Arrangement Fee | Product Fee / Booking Fee | A fee charged by the lender for setting up your mortgage, ranging from £0 to £2,000+ | Can be paid upfront or added to the loan (but you then pay interest on it for the full term) |
| ERC | Early Repayment Charge | A penalty fee charged if you repay all or part of your mortgage during the initial deal period | Typically 1–5% of the outstanding balance. Important if your circumstances might change |
| Mortgage Retention | Retention / Holdback | Where the lender withholds a portion of mortgage funds until certain conditions are met, such as roads being adopted or building control sign-off | Specific to new builds — you may need to cover the retained amount yourself until the lender releases it |
| Stage Payments | Progressive Drawdown | A payment structure for off-plan purchases where the mortgage is released in stages as construction milestones are reached | Not all lenders offer stage payments, so your broker needs to source one specifically for off-plan purchases |
Key Finance Terms Explained Further
Deposit: The portion of the property price you pay from your own savings. For new builds, the minimum is typically 5–10% of the purchase price, though some schemes allow lower deposits. Your deposit determines your LTV, which directly affects the interest rates available to you. If you are still building your deposit, our guide to saving for a new build deposit covers every strategy worth considering.
Stamp Duty Land Tax (SDLT): A tax paid to HMRC when you buy a property above a certain price threshold. First-time buyers benefit from significant relief — currently paying no stamp duty on the first £425,000 of a property priced up to £625,000. See our stamp duty relief guide for a full breakdown.
Mortgage Valuation: An assessment carried out on behalf of your lender to confirm the property is worth the amount they are lending. This is not the same as a full survey — it protects the lender, not you. For new builds from established developers, lenders sometimes accept a desktop valuation rather than a physical inspection.
Affordability Assessment: The calculation your lender performs to determine whether you can afford the repayments, both now and if interest rates rise. Lenders “stress test” your application at higher rates (typically SVR plus 3%), which is why the amount you can borrow is often less than simple income multiples suggest.
New Build Specific Terms
These are the terms that set new build purchases apart from buying an older property. If you are visiting developments, talking to sales advisors, or reading through a reservation agreement, you will encounter these regularly.
| Term | What It Means | When You Will Encounter It |
|---|---|---|
| Snagging | The process of identifying minor defects, cosmetic issues, or unfinished work in a newly built home before or shortly after you move in | Just before or after completion. Many buyers hire a professional inspector (£300–£600) |
| Defect Liability Period | A period (typically 2 years) during which the developer must return and fix any defects that emerge, at no cost to you | After you move in. Report issues promptly within this window |
| NHBC Buildmark | A 10-year structural warranty from the NHBC covering major structural defects. Years 1–2 are the developer’s responsibility; years 3–10 are NHBC-insured | At completion. Your solicitor checks this is in place. See our warranties guide |
| CML Certificate | A certificate (now handled by UK Finance) confirming the build meets standards required for mortgage lending | Before completion — your lender requires this before releasing mortgage funds |
| Building Control Sign-Off | Official confirmation from the local authority that the completed building meets all relevant building regulations | Before completion. Without this, your lender may retain part of the mortgage funds |
| Practical Completion | The point at which the developer considers the home substantially finished and ready for handover, though minor snagging items may remain | Triggers the completion process — the developer notifies you the home is ready |
| Off-Plan | Buying a property before it has been built, based on plans and specifications. You reserve the plot and the home is constructed afterwards | At reservation. Longer wait but potentially better pricing or plot choice |
| Phase | A section of a larger development built and released for sale as a distinct group (e.g., 200 homes in 4 phases of 50) | When browsing — earlier phases may have different pricing or specifications |
| Plot Number | The unique identifier for your specific property within a development, shown on the site plan | At reservation — all legal documents reference your plot number |
| Specification Sheet | A document listing exactly what is included: kitchen, bathroom fittings, flooring, appliances, landscaping, and any upgrades | Before reservation. Check it carefully so you know exactly what you are getting |
| Show Home | A fully furnished example of a house type, designed to help you visualise the finished home. Often includes upgrades not included as standard | When visiting developments. Always compare the show home to the specification sheet |
| Reservation Fee | A payment (typically £500–£1,000) to secure your chosen plot while mortgage and legal work proceed | When you decide to buy. Usually deducted from your final purchase price |
| Longstop Date | The absolute final deadline by which the developer must complete. If missed, you can withdraw and receive a full refund | In your contract. Essential protection for off-plan buyers |
Understanding Snagging in Detail
Snagging deserves special attention as one of the most important terms for new build buyers. A professional snagging inspection typically identifies 50–150 items in a brand-new home. This is completely normal — construction is a complex process and minor cosmetic issues are virtually inevitable.
Common snagging items include:
- Paint touch-ups, scuffs, or uneven coverage
- Minor plaster cracks around window and door frames
- Scratches on glass or window frames
- Gaps in sealant around baths, showers, and worktops
- Doors not closing properly or catching on frames
- Incomplete or uneven grouting in tiled areas
- External issues like unfinished landscaping or fencing
The developer is obligated to address legitimate snagging items. Report them as soon as possible and keep a written record of everything you report.
Legal & Conveyancing Terms
The legal side of buying a home generates some of the most confusing jargon. Your solicitor handles this work, but understanding the key terms is essential. For a full walkthrough, see our new build conveyancing guide.
| Term | Plain English Definition | Key Details for New Build Buyers |
|---|---|---|
| Exchange of Contracts | The moment the purchase becomes legally binding. Both parties sign identical contracts and they are “exchanged” through solicitors | You pay your exchange deposit (usually 10%) at this point. For new builds, exchange often happens weeks or months before completion |
| Completion | The final step: your solicitor transfers the remaining funds, ownership passes to you, and you collect the keys | The developer confirms a completion date once practical completion is achieved, typically giving 10–14 days’ notice |
| Conveyancing | The legal process of transferring property ownership, covering all checks, paperwork, and fund transfers | New build conveyancing is more complex due to additional checks on planning permissions and management structures |
| Searches | Investigations into the property and area — local authority plans, environmental risks, flood risk, and drainage connections | Can take 2–6 weeks depending on the council. May reveal important information about future development nearby |
| Title Deed | The legal document proving ownership of a property, registered with HM Land Registry | For new builds, the developer creates a new title for each plot, registered after completion |
| Leasehold | You own the property for a set number of years but not the land. Common for flats and some new build houses | Check the lease length (125+ years ideal), ground rent, and service charges. See our leasehold vs freehold guide |
| Freehold | You own both the property and the land outright, with no time limit. Most new build houses are freehold | Even freehold properties on managed developments may have estate management charges |
| Ground Rent | An annual charge paid by leaseholders to the freeholder. For new leases since 30 June 2022, this must be £0 (peppercorn) under the Leasehold Reform Act | If buying leasehold, confirm ground rent is £0. Older developments may have existing ground rent clauses |
| Service Charge | A regular payment covering maintenance of communal areas, landscaping, lifts, and shared facilities | Ask the estimated annual amount before reserving — this figure may change once the management company takes over |
| Management Company | The company maintaining shared areas, roads, green spaces, and communal facilities on the development | Check who runs it, what it covers, and whether residents can take control in future |
| Restrictive Covenants | Legal restrictions in the title deed limiting what you can do (e.g., no commercial use, no satellite dishes on front elevations) | Common on new build estates. Read them carefully — they affect future alterations or extensions |
| Section 38 Agreement | An agreement between developer and local highway authority for the adoption of new roads on the development | If roads are not adopted, residents may become responsible for repair costs |
| Section 104 Agreement | An agreement between developer and water company for adoption of the development’s drainage infrastructure | Ensures the water company takes long-term responsibility for drains and sewers, not residents |
| Transfer Deed (TR1) | The Land Registry document that transfers legal ownership from the developer to you | Signed at completion and filed with HM Land Registry to register you as the new owner |
Schemes & Incentives Terms
The UK government and mortgage industry offer several schemes to help first-time buyers. Each has its own terminology, and understanding the differences helps you choose the right option. For a detailed comparison, see our guide on Shared Ownership versus buying outright.
Current Schemes and What They Mean
- Shared Ownership: Buy a share of a property (typically 25–75%) and pay rent on the remainder to a housing association. You only need a mortgage for the share you buy, making the deposit and monthly costs more affordable
- First Homes: New build homes offered to local first-time buyers at a minimum 30% discount below market value. The discount passes on when you sell. Household income cap typically £80,000 (£90,000 in London)
- Deposit Unlock: A developer-guaranteed scheme allowing purchase with just 5% deposit, even when standard 95% LTV mortgages may not be available for new builds
- Own New – Rate: A scheme where the developer uses part of their marketing budget to “buy down” the buyer’s mortgage interest rate for a fixed period, reducing monthly payments without reducing the sale price
- Lifetime ISA (LISA): A savings account for 18–39 year olds with a 25% government bonus on contributions (up to £1,000 per year on £4,000 max). Usable towards a deposit on properties up to £450,000. See our LISA guide
Important Scheme-Related Terms
Staircasing: Buying additional shares in a Shared Ownership property over time. Each time you staircase, you own more of the home and pay less rent. You can eventually staircase to 100% full ownership on most schemes.
Equity Loan: A loan (historically through Help to Buy) where the government lends a percentage of the property price, interest-free initially. You repay the loan as a percentage of the property’s value at repayment time — if values rise, you repay more. Help to Buy has closed to new applicants, but existing holders still manage these loans.
Market Value Assessment: A professional valuation required before staircasing or repaying an equity loan. It determines the current market value used to calculate costs of additional shares or repayment amounts.
Developer Incentives: Benefits offered to attract buyers — contributions towards stamp duty, legal fees, flooring, or appliance packages. Often negotiable, particularly on plots available for a while or towards the end of a financial reporting period.
Construction & Quality Terms
New build homes are built to modern standards and regulations, so you will encounter terminology related to construction quality and energy efficiency. Understanding these helps you assess what you are buying and compare different developments.
Modern new builds are significantly more energy efficient than older properties. Approximate figures based on industry reporting.
Building Standards & Warranty Bodies
NHBC (National House Building Council): The UK’s leading provider of new home warranties and building standards. Around 80% of new build homes are NHBC-registered. The NHBC inspects during construction and provides the Buildmark warranty.
LABC (Local Authority Building Control): An alternative warranty and inspection body. LABC Warranty provides cover similar to NHBC Buildmark and is equally valid for mortgage purposes.
Premier Guarantee / Checkmate: Other new build warranty providers. Your lender will accept warranties from a range of approved bodies — check with your broker if unfamiliar.
Building Regulations: The national standards all new construction must meet, covering structural integrity, fire safety, energy efficiency, accessibility, ventilation, drainage, and electrical safety.
Energy Efficiency Terms
EPC (Energy Performance Certificate): A rating from A (most efficient) to G (least efficient). New builds typically achieve A or B, compared to the average older home rated D or E. Better EPC means lower energy bills.
SAP Rating (Standard Assessment Procedure): The methodology behind the EPC. It assesses insulation, heating efficiency, ventilation, glazing, and renewables to produce a score out of 100+. New builds typically score 80 or above.
MVHR (Mechanical Ventilation with Heat Recovery): A whole-house system that extracts stale air and replaces it with fresh filtered air, recovering up to 90% of heat in the process. Increasingly common in airtight new builds.
Air Source Heat Pump (ASHP): An electric heating system extracting heat from outdoor air to heat your home and water. More efficient than gas boilers and increasingly standard in new builds, working best with underfloor heating.
Part L: The Building Regulations section covering energy efficiency. The 2021 update requires a 31% reduction in carbon emissions compared to the 2013 standard.
Future Homes Standard: Planned changes from 2025 requiring 75–80% fewer carbon emissions than the 2013 regulations. Homes will typically feature heat pumps, high insulation, and potentially solar panels as standard.
Terms That Are Commonly Confused
Some property terms sound similar but mean quite different things. Here are the pairs that trip up first-time buyers most often.
Exchange vs Completion
Exchange is when contracts are signed and the purchase becomes legally binding — you pay your deposit and commit to buying. Completion is when the money transfers, ownership passes, and you get the keys. For new builds, there is often a gap of several weeks between the two.
Freehold vs Leasehold
Freehold means you own the property and land outright, forever. Leasehold means you own the property for a fixed period but not the land. Most new build houses are freehold; most flats are leasehold. The distinction matters enormously for your long-term costs and rights.
Mortgage Offer vs Agreement in Principle
An AIP is an initial indication a lender is likely to offer you a mortgage, based on basic checks. A Mortgage Offer is the formal document confirming the loan, issued after full underwriting and valuation. You need the full offer before exchanging contracts.
Ground Rent vs Service Charge
Ground rent is paid by leaseholders to the freeholder for the land. For new leases since June 2022, this must be £0. Service charge covers maintenance of shared areas and can apply to both leaseholders and freeholders. These are completely separate charges.
Snagging vs Defects
Snagging is identifying minor cosmetic issues during the initial inspection. Defects is broader, including more significant problems emerging over time under the defect liability period and structural warranty. All snags are defects, but not all defects are snags.
Frequently Asked Questions
What is the most important term I should understand as a first-time buyer?
Exchange of contracts is arguably the most critical because it is the point of no return. Before exchange, you can walk away (though you may lose your reservation fee). After exchange, you are legally committed, and withdrawing means losing your deposit and potentially facing legal action. Fully understand your solicitor’s report on title before agreeing to exchange.
What is the difference between a mortgage retention and stage payments?
A mortgage retention is when the lender reactively holds back funds because a condition is unmet (roads not adopted, building control pending). You may need to cover the shortfall yourself temporarily. Stage payments are a planned mortgage structure for off-plan purchases where funds are released at agreed construction milestones. Stage payments are intentional; retentions are reactive.
Do I need to understand Section 38 and Section 104 agreements?
You should understand the basics. Section 38 means the developer has agreed that roads will eventually be council-adopted (maintained). Section 104 is the same for drainage, agreed with the water company. Without these agreements, residents could become liable for maintaining roads and sewers — a potentially expensive responsibility. Your solicitor checks these during the conveyancing process.
What does practical completion mean and how does it affect me?
Practical completion is when the developer declares your home finished and ready for handover. This triggers your completion notice (usually 10–14 days), after which your solicitor arranges the final fund transfer. Practical completion does not mean 100% perfect — minor snagging items may remain — but the home should be safe, habitable, and substantially complete.
Why do some new builds have both a service charge and an estate management charge?
On mixed developments, the service charge covers the building itself (communal hallways, lifts, roof). The estate management charge covers shared outdoor areas, roads, landscaping, and play areas across the wider development. House owners might pay only the estate charge; flat owners might pay both. Factor these into your monthly budget calculations from the outset.
Your Jargon-Free Journey Starts Here
Property jargon can feel intimidating, but every term in this guide exists for a reason — and now you know what each one means. You do not need to memorise every definition, but having this reference means you will never feel lost talking to your broker, solicitor, or the developer’s sales team.
Key takeaways:
- Mortgage terms like AIP, LTV, and ERC directly affect how much you pay. Work with a broker who explains everything clearly
- New build terms like snagging, defect liability period, and practical completion are unique to new homes — understanding them protects your investment
- Legal terms like exchange, completion, and Section 38/104 agreements determine your rights. Never sign anything you do not fully understand
- Scheme terms like Shared Ownership, First Homes, and LISA could save you thousands — explore every option available
- Construction terms like EPC, Part L, and NHBC tell you about the quality and efficiency of what you are buying
If a professional uses a term you do not recognise, ask them to explain it — good brokers, solicitors, and sales advisors are always happy to help. For further reading, explore our guides on getting your credit score mortgage-ready, the complete buying timeline, and understanding your new build warranty.
Knowledge is power when buying your first home. You have just armed yourself with every term you need to know.