
24 April, 2025
NLA Innovation Summit: Prioritising Social Impact in 2025
by Kyra Kocis
Learn more
17 May, 2023 · 5 min read
The Greater London Authority’s (GLA’s) draft guidance notes on Development Viability and Affordable Housing were released last week. Consultation runs until 24th July, with the final documents due to be issued later in 2023. The two documents will replace the GLA’s 2017 Affordable Housing and Viability Supplementary Planning Guidance (SPG).
Together, the two documents run to 98 pages. We have summarised some of the key changes and potential implications below.
The draft Development Viability guidance sets out a much more detailed and prescriptive approach to financial viability assessments (FVAs) than has been required under the 2017 SPG.
The changes here are subtle and serve to modernise rather than overhaul existing guidance.
Whilst the final form of the two guidance notes will not be known until after the consultation period ends in July, these drafts clearly show the GLA’s direction of travel. The Affordable Housing guidance is relatively light touch and unlikely to be controversial.
However, the Development and Viability guidance sets out a new framework under which viability is to be assessed. There are several welcome and sensible additions which would better meet current market dynamics, for example, switches from BtS to BtR. However, overall, we suggest that this guidance has the potential to inject significant additional complication, cost, and time into viability negotiations across the capital.
The GLA is alert to this, with its carrot being the Fast Track Route, under which no viability testing is required as long as the relevant, affordable housing threshold (35% or 50%) is met.
Overall, the new guidance will have significant impacts on residential planning applications in London. If you’re interested in discussing the likely impacts of the guidance on your planning application and how they may affect your development plans, please check out our viability brochure and get in touch with one of our team.
7 April, 2025
by Josh Myerson
Learn more
27 March, 2025
by Charles Parkin
Learn more
27 March, 2025
Learn more