The law that was meant to make Sweden's planning process simpler made it 75 percent slower. The state's own expert reviewer drew the conclusion: Sweden's cities are now built by lawyers, not by city developers.
The reform
Sweden got a new Planning and Building Act (plan- och bygglagen, PBL). The government bill was titled En enklare plan- och bygglag: a simpler planning and building act. The intent was exactly what the name says. Planning and building processes would be simplified, handling would get faster. The new law replaced the 1987 act and came into force in May 2011.
The outcome was the opposite. In Stockholm County, a planning process (planprocess) took 35 months on average in 2010. After the 2011 law change, the average rose to 62 months: an increase of 75 percent. The figures come not from an industry lobby but from Kristina Alvendal's expert report Ineffektivt stadsbyggande, written in January 2024 as input to the Swedish government's Productivity Commission (Produktivitetskommissionen). Her verdict:
Det gör att Sveriges städer nu byggs av jurister i stället för stadsutvecklare, arkitekter, lokala politiker och fastighetsägare. Det framstår som klart att PBL har blivit för reglerande och för betungande.
The numbers
Slower in every series that exists. The slide continued long after the reform's teething problems: between 2015 and 2019, the average detaljplan, the local development plan that turns land into building rights, went from 45 to 57 months in Stockholm County. A full year added in four. Getting a new detaljplan now takes five years on average, according to the same report.
The industry's own measurement points the same way. Nationellt Ledtidsindex 2025, compiled by Byggföretagen and Fastighetsägarna from around 3,370 development plans and building permits, measures the time from the start of detaljplan work to construction clearance (startbesked): a weighted average of 4.8 years, up from 4.7 in 2024 and 4.5 in 2023. Lead times are growing even though municipalities handle fewer cases than before and more of them work actively on process improvement. Asked what drives it, the municipalities' own top answer is growing demands for investigations (utredningar) within the detaljplan process.
| Measure | Figure | Source |
|---|---|---|
| Planning process, Stockholm County, 2010 | 35 months | Alvendal (2024) |
| Same measure, after the 2011 PBL | 62 months (+75%) | Alvendal (2024) |
| Detaljplan, Stockholm County, 2015 → 2019 | 45 → 57 months | Alvendal (2024) |
| New detaljplan, national average | ~5 years | Alvendal (2024) |
| Start of detaljplan work → startbesked, weighted average | 4.8 years | Ledtidsindex 2025 |
| Same measure, 2023 | 4.5 years | Ledtidsindex 2025 |
The precise claim
Yes, and the claim should be scoped honestly. An ordinary building permit (bygglov) must by law be decided within ten weeks, municipal handling times are short, and they have not been getting longer. Anyone who wants to wave the criticism of PBL away points there. But the permit desk sits at the end of the chain. The slowness lives in the stage before it: in the detaljplan the permit is tested against, and in the permitting processes around larger infrastructure. That is where the years disappear, and that is the stage both the Productivity Commission's input reports and Ledtidsindex measure.
The mechanism
Every requirement produces documents. More protected interests to weigh means more investigations per plan. More investigations means more material to review. More material to review means more points of attack in an appeal. Municipal planners learn to write plans that hold up in court rather than plans that describe a good city. The workload grows without any single rule being unreasonable.
Alvendal's report gives a concrete example of how practice tightens without the law changing. A "minor deviation" (smärre avvikelse) from a detaljplan used to be read as allowing up to ten percent; case law has narrowed it to around one percent. No member of parliament has voted on the matter. The interpretation is made by lawyers.
The people running construction sites recognized the direction early. "Nu tar administrationen över alltmer" — administration is taking over more and more — said Pär Rask, chair of the construction managers' association Byggcheferna in western Sweden, back in 2015. Since then the document volume has kept growing while the human capacity to write, read and review it has stayed flat.
The takeaway
Rules can be rewritten, and attempts are underway: Alvendal's report was commissioned by a state productivity inquiry, and in 2025 Boverket restructured the national building rules into a new, split-up rulebook. But legislation takes years, and nobody is proposing to remove the consultations, the environmental scrutiny or the legal certainty. Those are the point of a planning process.
What is not the point is the pace of the paperwork around them. The investigations, the reviews and the responses to reviews are document work, produced and checked by hand, at human speed. That part can run faster without a single trade-off getting less scrutiny: quicker iterations, not less deliberation. The lawyers did not slow Sweden's cities down on purpose. They filled a space that opened up when the documents outgrew the people. That space can be shrunk.
Sources
Yesper is the AI civil engineer for construction and infrastructure. AFRY, COWI, NRC Group and other Nordic firms use it to halve the time on a study, rerun calculations in minutes, and catch errors that would otherwise slip through. Get in touch if you'd like to see what it can do for you.
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