BLOGS

A pipeline that keeps filling, output that doesn't keep pace

UK planning committees have kept approving housing at a fairly consistent clip since 2022, with quarterly grants of residential permissions generally running between 90,000 and 127,000 units. That's a healthy pipeline on paper. But the professional investors, lenders and developers using REalyse to track delivery know that a "Granted" decision is only the start of a story that, for many sites, stalls long before spades hit the ground.

The gap between approval and delivery has become one of the defining features of the current cycle. It matters commercially: for lenders it changes the risk profile of development finance, for investors it delays returns on forward-funded schemes, and for agents it means fewer new-build instructions arriving on schedule. Understanding where in the pipeline schemes are getting stuck — and in which regions — is now a core part of site selection and portfolio risk assessment.

What the approvals data actually shows

Looking at residential planning decisions over the past four years, REalyse data shows the number of applications granted per quarter has softened gradually, from around 5,400 in late 2022 to closer to 3,700–4,300 through 2024 and 2025, even as total units granted per quarter has stayed comparatively resilient in the 90,000–127,000 range. In other words, fewer applications are being approved, but each approved scheme tends to carry more units — consistent with a market increasingly weighted toward larger strategic sites and fewer small-scale infill permissions.

That shift matters. Larger sites typically carry longer lead times between decision and delivery: multi-phase infrastructure, section 106 obligations, and viability renegotiation all add friction that smaller schemes don't face to the same degree. A pipeline that looks stable in unit terms can still translate into slower actual output if its composition is skewing toward the kind of schemes that take longer to build out.

The construction output gap

Contrasting the planning pipeline against new-build sales transactions — a reasonable market proxy for homes actually reaching completion and buyers — shows just how uneven conversion has become. Across the last three years, the ratio of new-build transactions to units granted planning permission averaged around 16% nationally, but the spread between regions is wide enough to reshape where developers and lenders should be underwriting risk.

This is not a precise "build-out rate" in the NHBC or DLUHC sense — new-build sales transactions capture completed homes that have sold, not total construction output, and will lag behind live construction. But as a proxy for how effectively a region's approved pipeline is translating into homes actually reaching the market, the pattern is instructive.

Where delivery is lagging most

REalyse's regional comparison ranks UK regions by this delivery-conversion ratio, and the results point to a clear north-south, market-maturity divide:

• Northern Ireland shows negligible new-build transaction activity against a meaningful granted pipeline (over 27,000 units), suggesting either a data-timing lag or a genuinely constrained delivery market worth investigating further at a local authority level.

• Scotland converts only a small fraction of its ~86,000 granted units into recorded new-build sales, the lowest ratio of any UK nation among regions with active transaction volume.

• South West and South East England, despite carrying two of the largest approved pipelines in the country (116,000 and 187,000 units respectively), convert at only around 13–14% — a reminder that high approval volumes in high-value, high-constraint markets don't automatically translate into proportionate output, likely reflecting viability pressure, infrastructure phasing and section 106 negotiation timelines.

• At the other end, East Midlands, North West England and North East England show the strongest conversion ratios (23–32%), pointing to markets where sites are moving from permission to market faster — potentially reflecting smaller average scheme sizes, lower land and build-cost pressure, or more straightforward planning conditions.

For institutional investors and lenders, this spread is the practical takeaway: a large approved pipeline in a given region is not, on its own, a signal of near-term supply. Where conversion ratios are structurally low, that should feed into underwriting assumptions on delivery timelines, absorption rates and exit pricing — and it's exactly the kind of comparison REalyse's planning and transaction data is built to support at local authority and postcode-district level.

What's likely driving the block

A few structural factors plausibly sit behind the gap, though causes vary by site and region:

• Viability and build-cost pressure — elevated construction costs relative to a few years ago continue to squeeze scheme viability, particularly on sites approved when land values were priced against a different cost base.

• Section 106 and infrastructure phasing — larger strategic sites, which now represent a bigger share of granted units, often carry phased infrastructure and affordable housing obligations that push first completions out by several years from decision date.

• Developer risk appetite — with mortgage rates still elevated relative to the pre-2022 period, some housebuilders have been managing build-out rates deliberately to match sales absorption, rather than building at capacity.

• Local authority resourcing — even post-decision, discharge of planning conditions can be a bottleneck in authorities with stretched planning teams, delaying the point at which construction can legally start.

Outlook

None of this points to a single fix, but it does sharpen where attention should go. For developers and investors, the message is to treat "units granted" as a starting reference point, not a delivery forecast — and to weight regional and site-level conversion history into appraisal and underwriting. For lenders, tracking a scheme's planning history alongside comparable local delivery ratios adds a layer of risk context that headline pipeline figures alone won't provide.

As approvals data continues to accumulate quarter on quarter, the more useful question for the market isn't "how much has been approved" but "how much of that is actually converting" — and on current REalyse data, the answer still varies enormously by region.