Net sales area (NSA) verification for new-build apartments
As-built net sales areas for new-build apartment schemes, measured by 3D laser scan and compared unit by unit with your design schedule, so commercial teams can value and report with confidence.
Why NSA is verified
On large apartment schemes, net sales area feeds directly into sales prices, rental values and funder reporting. Developers and QS teams commission verification during the build so they know what has actually been built, not just what the drawings say.
Net sales area is the internal floor area of a unit, typically measured to the internal face of external and party walls, and used to quantify the sellable or lettable space.
How we survey a live site
Access, not measuring, is usually the limit on a large scheme. We agree a unit list and access windows with the site manager, work a planned route by core or floor, scan quickly with 3D laser scanners and stay out of the way of other trades. Any unit that is locked or not ready is recorded straight away so the schedule stays consistent.
Experience
We have completed a high volume of NSA verification surveys across the UK, including large London developments such as Capital Interchange (232 apartments) and 239 Mill Road, where the priority was consistent plans and figures across a large unit schedule within a live construction programme.
How it works
Agree the basis
We agree the measurement basis up front, RICS Code of Measuring Practice, IPMS or your own definition, and apply it to every unit.
Scan units on site
We work with the site manager on a planned route through the building, scanning units as they become ready and working around other trades.
Schedule and plans
You receive the comparison schedule and a PDF plan for every unit, with unit references matching site numbering.
Who we work with
Developers
Confirmed areas for sales, lettings and valuation before practical completion.
Quantity surveyors and commercial teams
A schedule you can review quickly, with variances already calculated.
Funders and valuers
An auditable as-built record with the measurement basis stated.
What clients say
Read our reviews on Google★★★★★
Having worked with THS for several years now, each project is treated with high professionalism every time. We would highly recommend their team.
★★★★★
I was impressed by THS Concepts topographical survey services' professionalism and accuracy. They were efficient and reasonably priced. I highly recommend them.
★★★★★
We recently approached THS Concepts to carry out a level survey of the screed to the ground floor of a large residential property we were Project Managing. The property was undergoing extensions and refurbishment work. We had a tight timescale to receive the information, and THS Concepts delivered quickly and efficiently to meet our deadline. This is the second time we have used them and would highly recommend.
Net sales area surveys: common questions
When should NSA verification be carried out?
Once the unit layout is fixed and measurable, usually during fit-out when plasterboard is up, and often in batches as units become available rather than waiting for the whole block.
Can you measure furnished apartments?
Yes. We can measure bare or finished units. The internal layout just needs to be established.
What standard do you measure to?
Usually the RICS Code of Measuring Practice, or IPMS for residential buildings where the instruction requires it. If your appointment uses its own NSA definition, we follow that and state it in the deliverables.
What do you need from us to quote?
A unit list, the site programme or access plan, your design area schedule (Excel is ideal) and any drawings that identify unit types and numbering.
Related services
- 3D laser scanning
Point clouds and BIM models of buildings, plant and structures.
Tell us about your site
Send a location, a rough brief and your deadline. We reply with a fixed quote within 24 hours.