New build house survey: why you still need one and what it covers

What makes this property type distinctive

New builds are governed by Building Regulations 2010 (as amended), Part L (energy), Part F (ventilation), Part M (accessibility) and Part Q (security). NHBC (or Premier Guarantee, LABC, BLP, Checkmate) provides a 10-year warranty: the first 2 years are developer-fix obligations for any defect, years 3–10 cover structural defects only. Most new builds use timber frame, modern masonry cavity, or, increasingly, modern methods of construction (MMC) including light gauge steel and panelised systems.

Common defects to expect

These items are routine for the property type. Most are renegotiation items, not deal-breakers. The survey's job is to flag which apply to this specific property and which have already been addressed.

• Snagging items: paint finish, door alignment, sealant gaps, tile cuts, missing trim
• Inadequate ventilation: kitchen/bathroom extracts not commissioned, MVHR systems unbalanced
• Heating system: radiators not balanced, smart thermostats not commissioned, hot water cylinder oversized or undersized
• Garden/external: fence post movement, drainage gradients incorrect, soakaway capacity insufficient
• Cracking from settlement in the first 12–18 months, usually cosmetic but worth documenting
• Roof tile alignment, dry verge condition, ridge tiles bedded vs dry-fixed
• Drainage runs incorrectly graded, surface water in gardens
• Acoustic separation in flats: party-floor and party-wall transmission

What the survey should cover

• Pre-completion snagging list, Consumer Code for Home Builders requires the developer to address pre-completion items
• Visual structural assessment, especially for timber frame or MMC properties
• External: roof, render or brickwork, drainage, external paving
• Internal finishes against the spec sheet, flooring, kitchen, bathroom, sanitaryware
• Electrical and plumbing commissioning evidence (certificates, smart-home setup)
• Fire safety compliance for flats: stay-put strategy, fire doors, sprinklers if Part B-M applicable

Which survey level to book

A snagging survey (typically £300–£600) at pre-completion is the most useful document for a new build, more useful than a RICS Level 2 or 3. RICS Level 2 has limited value on a new build because the property is not ageing yet. RICS Level 3 makes sense if you have specific concerns about timber frame, MMC or the developer.

For a deeper comparison see Level 2 vs Level 3 survey.

Construction-specific risks

New build construction quality varies widely between developers and even between plots on the same site. Timber-frame new builds are mortgageable on the high street; light-gauge steel and panelised systems are more variable on lender appetite. The NHBC warranty is the standard but not universal, confirm which warranty provider applies before exchange because some specialist lenders only accept specific providers.

What to check before offering

• →Confirm the warranty provider (NHBC, Premier Guarantee, LABC, BLP, Checkmate) and the years covered
• →Read the Consumer Code for Home Builders, your statutory rights as a new-build buyer
• →Check the developer's snagging policy and any reservation-fee terms
• →Ask for the EPC and any in-use energy certificates (some developers commission monitored data)
• →Confirm the construction type, timber frame, masonry, MMC, and any lender restrictions

Use the full pre-offer checklist on the house buying checklist to combine these property-type checks with the standard pre-offer items.

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Frequently asked questions