Bakerloo southern extension: position early orwait for opening
South-east London has been waiting for this line for more than 90 years — first proposed 1931, formal TfL consultation 2014, PIN published 2017, then frozen by TfL's financial crisis in 2019. Khan revived the rhetoric after re-election, but funding is still not confirmed in 2026. Some of the premium has already been priced in. The question: is it too late to ride?
4 new stations2030+ opening~£8bn funding gap
01 · The Plan
What's actually being built
Status today: Bakerloo runs from Harrow & Wealdstone in the north and terminates at Elephant & Castle. The southern extension would run from E&C via Old Kent Road / New Cross Gate / Lewisham, with longer-term ambitions out to Hayes (BR3). The current locked plan is just to Lewisham — about 4-5 km, four new stations.
New stations
4
Old Kent Rd 1, Old Kent Rd 2, New Cross Gate, Lewisham (final naming may change)
Plan length
~4.5 km
Phase 1 to Lewisham; Phase 2 to Hayes/Bromley sits in long-term vision papers without a timeline
Budget estimate
£7-8bn
2019 TfL estimate; inflation-adjusted to 2025 it's closer to £9-10bn — well above the headline
Key context: the existing Bakerloo fleet (1972 stock) averages 50+ years old — the oldest on the Underground. Any extension has to be coupled to fleet replacement, which is why TfL internally treats "southern extension" as part of "Bakerloo modernisation," together a ~£10bn package. That has real implications for fundability.
02 · Timeline
90 years of plans; still unbuilt in 2026
The "promised but never built" history of this line could fill a book. Each near-go has been pushed back. What investors need to internalise: every previous "near-construction" moment has failed — so the historical base rate is pessimistic.
1931First proposed
Bakerloo to Camberwell extension first appears in LPTB planning. Multiple later restarts went nowhere.
2014Formal consultation
Under Boris Johnson, TfL launches the Bakerloo Line Extension (BLE) public consultation. Route locked along the Old Kent Road corridor to Lewisham. The starting point of the modern version.
2017PIN + phase design
TfL issues the Project Initiation Note (PIN), runs second-round consultation. Original schedule: TWAO submission in 2023, construction from 2030, opening 2040.
2019-2020Frozen
COVID destroys TfL's farebox, central government bailout strips capex. BLE deferred indefinitely. Khan repeatedly promises to restart it but central government demands a clear funding plan.
2024-07Labour takes office
Labour wins the election. London Mayor Khan and Chancellor Reeves meet several times with BLE on the agenda. The 2024-10 Budget does not allocate BLE funding but commits to "evaluation."
2025-2026Restart signals · today
TfL's 2025 Business Plan re-lists BLE as a "long-term ambition." Lewisham and Southwark councils continue lobbying. But still no funding commitment — the market disagrees wildly on when ground actually breaks. Optimists: 2027-2028 land assembly. Pessimists: 2030+ before any spade.
2030+Potential opening
Even with an immediate 2027 start (very optimistic), Crossrail's analog (13 years from start to open) puts opening at 2040. The most plausible current timeline is 2035-2042.
03 · Already Priced In
Where the dividend has already been eaten
The Crossrail lesson: premium starts pricing in 5-10 years before opening. The Bakerloo "opening expectation" has been brewing for 12 years (counting from 2014). The right question is: which outcodes have already absorbed the gain, and which are still waiting?
2018-2025 cumulative price growth · vs Greater London +18% (GLA HPI)
Green: outperforms London average. Orange: underperforms. Bakerloo-affected core outcodes.
SE15 (Peckham)
+25%
SE14 (New Cross)
+22%
SE1 (Elephant)
+20%
SE15 (Old Kent Rd)
+18%
SE13 (Lewisham)
+15%
SE4 (Brockley)
+13%
SE8 (Deptford)
+11%
Source: HM Land Registry HPI, outcode-median, 2018-04 to 2025-04. Greater London median over the same period: +18%. SE15 / SE14 / SE1 have priced in most of the expectation — note this isn't all Bakerloo (Peckham's cultural rise, Goldsmiths student demand, Elephant & Castle regeneration all feed in), but Bakerloo is one component.
Reading the chart
SE13 / SE4 / SE8 underperformed = "opening dividend" still on the table
These three outcodes happen to be the Bakerloo terminus (SE13) plus its spillover (SE4 / SE8). They underperformed London 2018-2025, meaning the market has not yet priced in this Bakerloo expectation. If Bakerloo lands a funding commitment in 2027-2030, these outcodes will outperform SE15. Equally, if it freezes again, they fall the least (since they didn't run up).
04 · Decision Tree
Position early or wait for opening
Three buyer profiles, three different optimal strategies. The same Bakerloo story means very different things for owner-occupiers, short-term investors, and long-term holders.
Profile
Recommended timing
Region + risk notes
Owner-occupier (5-10 year hold)
Buy now
SE13 / SE14 / SE15 are all viable — Bakerloo opening or not has minor effect on lived comfort (Overground / DLR / Thameslink already cover the area). If it opens, bonus; if it doesn't, quality of life is unchanged. Focus on council scores, crime, schools instead. SE13 / SE4 better on price base than SE14 / SE15.
Short-term investor (3-5 year exit)
Don't buy
Bakerloo's timeline far exceeds five years — a "sell before opening" thesis doesn't hold. The 2014-2025 "opening expectation" has cycled in and out several times, leaving the current position neutral. For 3-5 year exits, look instead at Old Oak Common / Crossrail second-order effects (see our Crossrail 5-year review).
Long-term hold (10+ year buy-to-let)
Selective buys SE13 / SE4
If you genuinely believe Bakerloo opens 2035-2040, SE13 / SE4 / SE8 offer the best risk-reward (already underperforming London, biggest priced-in headroom). Position before any funding-commitment announcement — the moment Khan secures commitment, prices reset.
SE15 / SE14 existing holders
Hold, don't add
Already gained. Next leg requires being within 18-24 months of opening. Probably 5-10 years of sideways in between. If you've held SE15 5+ years and are happy with the resale price, consider rotating into SE13 — same budget buys a larger unit with more upside.
Renters
SE13 / SE4 are the value pockets
Best rent-to-quality in the area. DLR + Lewisham National Rail + Brockley Overground keep commuting comfortable. If Bakerloo eventually opens, rents step up but you're locked into a low base. A 2-3 year lease with a break clause is a hedge.
05 · Three Scenarios
Three 2026-2030 scripts
Given current funding status and political conditions, the next four years really only run three ways — each with its own price scenario.
A
Funding settled before 2027 (optimistic, 35%)
Reeves's 2026 Spring Budget or the 2026/27 Spending Review confirms full BLE funding. Market reaction: SE13 / SE4 / SE8 +10-15% in the 6-12 months after; SE14 / SE15 already priced in, +5% more. This is the early-Crossrail post-2008 pattern. The optimal entry is 3 months before announcement — but the announcement month is unknown.
B
Partial funding + phasing (neutral, 40%)
The most likely scenario: Reeves grants BLE early-stage money (say £500M-1bn) for detailed design and land assembly, with capital construction funding pushed to the next Parliament. Market reaction: SE13 / SE4 +5%, narrative alive but no commitment device. 2027-2030 is mostly sideways with small swings.
C
Frozen again (pessimistic, 25%)
Reeves's fiscal headroom tightens, BLE is parked into a "later parliament" project. Khan's term ends 2028; the next Mayor's stance is unknown. Market reaction: SE13 / SE14 / SE15 underperform London by -3-5% (narrative premium unwinds), but SE13 / SE4 fall less than the runners (they hadn't run up). Mini-version of the HS2 northern lesson.
06 · 5 Lessons
Apply the Crossrail and HS2 lessons to Bakerloo
The lessons from the prior two projects map directly onto the Bakerloo decision. One by one.
1
"Legislated + consulted" can still be cancelled
HS2 Phase 2 was legislated and was still cut. Bakerloo isn't even legislated — it's PIN + consultation. The cancellation bar is even lower. Historical base rate should therefore be more pessimistic than HS2; nothing is secure until funding commitment lands.
2
Most premium prices in 5-10 years before opening
Crossrail evidence: premium priced in 2010-2018, with little to add at the 2022 opening. If Bakerloo opens 2035-2040, premium should price in 2025-2030 in stages — meaning "wait for opening" is the wrong strategy; "wait for funding commitment" is the right one.
3
Don't go heavy on "pure infrastructure" plays
A Crossrail finding: areas with local fundamentals + infrastructure rose most reliably (Whitechapel triple combo); areas held up purely by infrastructure (Custom House / Crewe) got eaten by supply or by cancellations. SE13 / SE4 have local fundamentals (Lewisham council schools improving, Goldsmiths spillover, Brockley cultural pull) — they're not a pure Bakerloo bet, much healthier than Crewe's HS2 bet was.
4
Heavy new-build supply absorbs premium
Old Kent Road is a Southwark Opportunity Area, with ~25,000 homes earmarked for delivery 2024-2040. Second-hand stock along the SE15 / Old Kent Road corridor faces sustained supply pressure — same shape as Custom House. If you buy into a new-build cluster, model the 5-year release schedule explicitly.
5
Existing transport makes Bakerloo a "nice-to-have"
SE13 / SE14 / SE15 already have Overground (New Cross Gate / Brockley) + DLR (Lewisham) + Thameslink (Elephant & Castle) + National Rail (Lewisham). Bakerloo is icing, not lifeline — totally different from Whitechapel's congested-District-line pain. So Bakerloo's premium ceiling may be lower than the Crossrail comparable suggests — temper expectations.
07 · Verdict
Final scorecard
Three sentences for three buyer types.
A
Owner-occupier: SE13 / SE4 are buyable now
Existing transport is sufficient; Bakerloo is bonus. SE13 medians run ~15-20% below SE15, with larger units and improving council ratings — the value-for-money case alone makes it sensible. The Bakerloo story should be tail upside, not the central thesis.
B
Buy-to-let: wait for the funding announcement
Don't go heavy with funding still unclear. The optimal entry is 3-6 months before Reeves announces — almost impossible to time precisely. Second best: put SE13 / SE4 on a watchlist; track Mayor's monthly Q&A and Spring/Autumn Budgets. The moment a commitment device lands, move.
C
Policy watchers: the funding model is the real unknown
Engineering, route, consultation are 90% done. The blocker is sourcing £8-10bn — TfL self-funding + central matched + Mayoral Community Infrastructure Levy (MCIL) + Land Value Capture (corridor development levies). 2026-2027 is about whether that mix gets settled — not the technical detail. Crossrail's funding came together the same way (central + Crossrail Levy + bespoke mechanism); the precedent exists, but each round is renegotiated.