A HELPFUL GLOSSARY GUIDE TO NEW BUILD TERMS

TL;DR:
Buying a new build comes with its own language, and this A-Z glossary breaks down all the confusing terminology you’ll encounter from reservation through to moving day and beyond. Understanding key terms such as practical completion, completion date, and snagging helps you make informed decisions and navigate the buying process with confidence rather than confusion.
Don’t get lost in translation
Buying a new build home is exciting – but let’s be honest, it comes with its own language. If you’ve found yourself nodding along during a sales appointment whilst secretly wondering what on earth “practical completion” means, you’re definitely not alone. This new build glossary is here to help.
Whether you’re a first-time buyer taking your first steps onto the property ladder or simply new to the world of new builds, this first-time buyer new build guide will walk you through the key new build terms explained in plain English. Consider this your essential new build buying guide – no jargon, no confusion, just straightforward explanations of the new build terminology you’ll encounter from reservation right through to moving day and beyond.

A
Adoption of roads
When your local council officially takes over responsibility for maintaining the roads, pavements, and street lighting on your development. This is typically 12-24 months after construction is finished – once everything meets their standards. Until this happens, the developer or a management company maintains these areas. This matters because once adopted, you won’t pay separate road maintenance charges; they’re covered by your council tax instead.
B
Building control sign-off
Think of this as your home’s final school report. Building control (either from the local council or an approved inspector) checks that your property has been built according to regulations throughout construction. The sign-off confirms everything meets the required standards. You’ll receive this before completion. It’s proof your home is safe and legally compliant – crucial for your mortgage lender and future resale.
C
Completion date
When ownership legally transfers from the developer to you, which is usually a few weeks after you exchange contracts. Your solicitor releases the funds, you collect the keys, and the property becomes yours. This is crucial because it’s when you can actually move in, and the property is legally yours – the culmination of the entire buying process.
Completion notice
A formal letter from your developer, typically giving you 14 days’ notice, that your home is ready for legal completion. Once you receive this, you’ll need to complete within the specified timeframe or potentially face penalties. It’s your cue to get everything lined up: finalised mortgage, removals booked, solicitor ready to exchange.
Construction phase
The period (typically 6-12 months) when your home is actually being built, from groundworks through to finishing touches. If you’ve bought off-plan, you’ll watch your property progress through this phase, and most developers offer site visits so you can see progress. Understanding construction timelines helps you plan your move and make decisions about upgrades before certain deadlines pass.
Contract pack
A bundle of legal documents that your solicitor receives from the developer’s solicitor before you exchange contracts, including title deeds, planning permissions, warranties, building regulations certificates, and the terms of sale. Your solicitor reviews this thoroughly because it contains all the legal information about what you’re buying – essential for protecting your interests.
Customer care period
Usually, the first two years after you move in, when the developer provides additional support for any issues that arise. It runs alongside your warranty and typically includes regular inspections at set intervals (often at 1 month, 3 months, and 12 months). This matters because it’s your direct line to the developer for addressing any teething problems – from minor cosmetic issues to more significant defects.
D
Defects liability period
Similar to the customer care period, this is the timeframe (usually 24 months after completion) during which the developer remains responsible for fixing any defects or problems with your home. Think of it as your builder’s promise to put right anything that wasn’t quite right from the start, which matters because you’re protected against possible poor-quality craftsmanship during this crucial settling-in period.
E
EPC (energy performance certificate)
An energy efficiency rating for your home, graded from A (excellent) to G (poor), which you’ll receive before completion and is valid for 10 years. New builds typically score A or B thanks to modern insulation, heating systems, and double glazing. A good EPC rating means lower energy bills – which is increasingly important as costs rise.
Exchange deadline
The date by which you must exchange contracts with the developer. Typically set when you reserve and can range from 14 days to several months, depending on when you reserved and when the property will be ready. This is a hard deadline that matters because missing it could mean losing your dream home and potentially your reservation fee.
F
First fix
The first stage of installing services in your home during the construction period. This includes running electrical cables, plumbing pipes, and heating systems, all before any walls are plastered. You won’t see first fix work in the finished product – it’s all behind the scenes – but if you’re choosing upgrades like extra sockets, you need to make those decisions before the first fix is completed.
Freehold (new build)
You own both the property and the land it sits on outright, which is how most new-build houses are sold. This gives you complete ownership with no ground rent or lease to worry about, which matters because freehold generally offers more freedom and fewer ongoing costs than leasehold – though you’re responsible for all maintenance.
H
Home demonstration (home handover)
A guided tour of your completed home, usually conducted by the developer’s customer care team shortly before or on completion day, where they’ll show you how everything works – from the boiler and appliances to windows and alarm systems. This is your chance to understand your new home’s systems and raise any immediate concerns before you move in.
I
Incentives package
Perks offered by developers to sweeten the deal – potentially including help with buying schemes, deposit contributions, stamp duty paid, free flooring, upgraded kitchens, or cashback. At Wain Homes, this includes options like Part Exchange, Movemaker, Shared Ownership, Rent-To-Own, Forces Help to Buy, and our Own New Rate Reducer scheme. These incentives can significantly reduce your upfront costs or add value to your purchase, though it’s always worth checking that the base price is competitive too.

L
Leasehold (new build)
You own the property but not the land it sits on; instead, you lease it from the freeholder for a set period (often 99-999 years for new builds), paying service charges for maintenance and, potentially, ground rent, depending on the lease’s fixed term. Most new build flats are leasehold, though some houses are too, and this matters because it involves ongoing costs and some restrictions on what you can do with your property, plus potential issues when selling if the lease gets too short.
Long-stop date
The absolute final deadline for completion, set out in your contract, after which you can usually walk away and get your deposit back if the developer can’t complete. This protects you from delays to properties that could go on indefinitely and gives you an exit route if construction seriously overruns and your circumstances change.
M
Management company
A company responsible for maintaining communal areas on developments with shared facilities – things like landscaping, bin stores, play areas, or private roads before adoption, with residents paying service charges to the management company. The ongoing costs and the quality of communal areas’ maintenance can be affected, so it’s worth checking the company’s reputation and annual charges.
N
New build warranty
Insurance-backed protection (typically from NHBC or LABC) covering your home for 10 years, usually covering major structural defects for the full decade, with more comprehensive cover in years one and two, which the developer registers and passes to future owners. This is your safety net against serious structural problems – and it’s essential for getting a mortgage on a new build.
P
Practical completion
The construction milestone: when your home is substantially finished and ready for you to move in, with possibly still a few tiny bits of landscaping or communal areas to finish, but your property itself is done and signed off by Building Control. This triggers the completion notice and starts the countdown to your moving day.
R
Rentcharge (estate rentcharge)
An annual charge (typically £5-£30) for maintaining communal areas on freehold estates, separate from service charges. Some newer developments use rent charges rather than management companies for shared spaces. This is another ongoing cost (though usually modest) to factor into your budget.
Reservation agreement
The contract you sign when you reserve your plot, setting out the purchase price, reservation fee, exchange deadline, and sometimes the estimated completion date. Legally binding in both directions, this is the part of your moving-in journey when things get official – you’re committing to buy and the developer’s committing to sell at the agreed price.
Reservation fee
Money paid upfront (typically £500-£1000) when you reserve your plot, securing it, taking it off the market, and deducted from your purchase price at completion, or refunded if the developer can’t complete. You should make sure you’re absolutely certain before handing over money, as you’ll typically lose it if you pull out.
S
Second fix
The final stage of installation work after the walls are plastered, including the fitting of sockets, light fixtures, kitchen units, bathroom suites, door handles, and finishing touches. The second fix quality is what you’ll see and use daily, so it’s worth paying attention to during snagging.
Section 106 agreement
A legal agreement between developers and local councils, requiring the developer to contribute to local infrastructure, such as affordable housing, schools, parks, or transport improvements. This shows the development is contributing positively to the local area, which can improve community facilities.
Section 38 agreement
The formal agreement between the developer and council for adopting the development’s roads, setting out standards the roads must meet before the council takes them over. This matters because it ensures roads are built properly before adoption, protecting you from poor-quality streets.
Section 104 agreement
Similar to Section 38, but for sewers and drainage rather than roads, ensuring the water company will adopt and maintain the development’s drainage systems once they meet the required standards. This ensures you won’t have to pay for drain maintenance separately once adoption occurs.
Service charge (new build)
An annual fee for maintaining communal areas and facilities on developments – landscaping, lighting, cleaning, management fees, etc. It’s common on leasehold flats and some mixed developments and varies widely (£100-£3000+ annually). Since it’s an ongoing cost that can significantly affect affordability, you should carefully review what’s included and whether it might increase over time.
Snagging
The process of identifying minor defects or unfinished items in your new home before or just after completion, so that most developers can fix them. This can include wonky tiles, paint splashes, or poorly fitted skirting. Getting problems logged early means they’re fixed properly under warranty rather than becoming your problem later.
Snagging list
The written record of all the issues you’ve spotted during snagging – from cosmetic niggles to anything that doesn’t work properly – that is the developer’s responsibility to work through fixing. This is your official record of what needs addressing, so don’t be shy about adding things.
Specification
The details of what’s included in your home as standard, from kitchen quality and bathroom fittings to flooring type, windows, and heating system. Often called “spec” for short, these are the documents that developers provide during sales. This helps you understand what’s included, and to decide which upgrades you might want.
U
Upgrades and extras
Optional additions or improvements beyond the standard specification; usually available until certain construction deadlines. These matters are important because they can enhance your home and sometimes offer better value than DIY later, but they do add to your purchase price.
Your new build journey has just got really easy…
There you have it – your complete glossary of new build terminology. Bookmark this page and come back whenever you encounter a term that sounds like it belongs in a legal thriller rather than your house-buying journey. Understanding these terms puts you in control, helping you make informed decisions and know exactly what’s happening at every stage.
Remember, buying a new build should be exciting, not bewildering. If anyone – sales adviser, solicitor, or mortgage broker – uses a term you don’t understand, always ask them to explain. That’s what they’re there for!
If you’d like personalised guidance through the new build buying process, contact the Wain Homes team today – we’re here to help you every step of the way.