St Albans files loft conversions at 3.4 times the national rate. This is what a fixed-plot commuter town looks like.
St Albans City and District Council received 2,994 planning applications in 2025. Of the 3,000 applications decided across 2024-2025, 87.1% were approved and 12.9% refused, broadly in line with the national rate of 87.6% approved. The stronger story is in what owners are asking for: loft conversions make up 8.6% of applications against a national share of 2.6%, and garage conversions run at 2.2 times the national rate, both signs of a town where owners expand the home they already own.
The year in one line
St Albans received nearly 3,000 applications in 2025 and approved 87.1% of those decided, while owners filed loft conversions at 3.4 times, and garage conversions at 2.2 times, the national share.
What St Albans Is Building
Extensions lead, with roof projects far above the national norm.
Home extensions were the most common project at 34.6% of all applications, above the national norm of 29.1%. Roof work follows: dormers made up 10.2% of applications and loft conversions 8.6%, against national shares of 6.0% and 2.6%. Garage conversions added a further 5.4%. Demolition at 12.8% was also above the national 9.1%. This is the application mix of an established commuter town where owners adapt and enlarge existing homes rather than build new ones.
Applications submitted to St Albans City and District Council in 2024-2025, by project type.
The roof-space effect
St Albans files loft conversions at 3.4 times the national rate and garage conversions at 2.2 times. In a town of period and inter-war homes on fixed plots, owners extend upward and inward to add space.
The council verdict
The council verdict.
Of the 3,000 applications decided across 2024-2025, St Albans City and District Council approved 87.1% and refused 12.9%, about 1 in 8. That puts the refusal rate broadly in line with the national rate of 12.4%. Retrospective applications (built first, then seeking consent) were only 1.9% of the total, half the national rate of 3.7%.
About 1 in 8 St Albans applications was turned down.
applications were refused, against a national refusal rate of 12.4%. The approval rate of 87.1% is broadly in line with the national 87.6%.
St Albans vs The National Norm
A commuter town that builds upward.
Set St Albans against the national average and the home-improvement tilt is clear. Loft conversions run at 3.4 times the national share, the town's standout outlier. Garage conversions are at 2.2 times and dormers at 1.7 times. Extensions at 34.6% are also above the national 29.1%. The town does notably less of one thing: change of use to residential, at 1.1% against a national 2.2%, under half the national share.
St Albans files loft conversions at 3.4 times the national rate. With plots fixed and homes period or inter-war, owners convert the roof space they already own.
Each bar is St Albans's share of applications; the marker is the national share. Loft conversions are the town's defining outlier.
Meanwhile, the market
Prices sit high alongside the building work.
Permission may be straightforward to win here, but buying is not cheap either: St Albans remains one of the more expensive places in the country to own a home.
St Albans's planning data tells a consistent story. Owners here file loft conversions at 3.4 times the national rate and garage conversions at 2.2 times, the typical response in an established commuter town where the plot is fixed and the home is what you have to work with. The approval rate of 87.1% is broadly in line with the national norm, and retrospective applications are half the national rate, so this is not a place where owners are routinely taking chances. They are planning carefully and mostly winning.
Where the numbers come from
Planning Data
Applications submitted to St Albans City and District Council in 2025 (volume) and across 2024-2025 (shares and rates), classified from each application's published description. Shares are each category as a percentage of all applications in scope.
Decision Rates
Approval rate is approvals as a share of approvals plus refusals, computed over the 3,000 decided applications in the 2024-2025 window. The national benchmarks are computed the same way across all decided applications in England and Wales.
Sales Data
HM Land Registry Price Paid Data for the St Albans post town, the latest full year's completions, with growth measured against the previous year.
The Real Applications
Open the planning applications behind the numbers.
These are real applications submitted to St Albans City and District Council, from loft conversions and extensions to garage conversions that reflect the town's standout application mix. Open any one to see its full record.
72 Harpenden Lane, Redbourn AL3 7PB
A certificate of lawfulness for a loft conversion with a rear dormer and rooflights was refused, one of the applications rejected in a town that files roof work at well above the national rate.
See this property's full record4 Town Farm, Wheathampstead AL4 8QL
A loft conversion with a rear dormer and front rooflights, the roof-space work St Albans files most, was refused.
See this property's full record4 Hillside Road AL1 3QL
A scheme to raise the garage by a storey, extend at the front and convert it was turned down.
See this property's full record56 Langley Grove, Sandridge AL4 9DX
A certificate of lawfulness was granted for a loft conversion with a rear dormer and front rooflights.
See this property's full record13 Brownfield Way, Wheathampstead AL4 8LL
Permission was granted for two and single storey rear extensions, a front porch and solar panels, the kind of home enlargement that leads the local mix.
See this property's full record5 The Leys AL4 9HD
A certificate of lawfulness for a single storey extension and garage conversion was withdrawn before the council reached a decision.
See this property's full recordCurious about a home in St Albans?
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