There’s a parallel off-market property UK investors rarely see, running alongside the one on Rightmove and Zoopla. It’s bigger than most investors realise, and it’s growing. Hamptons’ research found that approximately 7.4% of homes sold in Great Britain in 2023 transacted off-market. For properties above £1 million, that figure jumped to one in three. Above £2 million, it was more than half. But off-market isn’t just a game for super-prime London mansions. Across England, the named research disagrees on scale and it is worth seeing why. Hamptons put the national off-market share at 7.4% in 2023, down from what the firm described in 2022 as around one in ten homes nationally. TwentyEA, as reported by Property Reporter, put it at 15.8% across England and Wales averaged over 2022 to 2024, and at 20.1% for homes above £1m against 6.7% below. TwentyEA sells off-market lead generation tools to agents, so like Hamptons it has a commercial stake in how this channel is sized. Those are different methods over different windows, so there is no single England-wide number to quote, and the one-in-five shape belongs to the £1m-plus segment rather than to the market as a whole. In early 2022, Hamptons recorded 37,000 off-market sales in a single quarter, the highest since 2007. Hamptons is an estate agency, so it has a commercial interest in the channel it measures. This report is the first attempt by a mid-market property investment brokerage to pull together the data, explain the mechanics, and answer the question that matters most to investors: how to reach this market, and whether it is worth the effort. We think it is. It is our entire business. Every deal we source for our investor network is off-market, secured before it reaches a portal, often before it reaches an estate agent. Here’s why that matters, and how the off-market landscape is shifting in 2026. If you want to see what’s available right now, browse our current off-market investment properties.
The size of the off-market sector
The honest answer: nobody knows exactly. Off-market transactions are, by definition, not centrally tracked. There is no off-market flag on Land Registry price paid data or in HMRC monthly property transaction data. But we can triangulate. HMRC’s monthly series puts UK residential transactions in 2025 at roughly 1.1 to 1.2 million. Apply the range the named research actually supports, 7.4% at the Hamptons end and 15.8% at the TwentyEA end, and somewhere between roughly 80,000 and 190,000 UK transactions a year complete without having been openly marketed. That is our own arithmetic on someone else’s percentages, not a measured figure, and the two percentages come from different methods over different periods. Note also that the HMRC transaction count is UK-wide while the off-market percentages are Great Britain and England and Wales respectively, so the total is indicative rather than exact. The gap is filled by a network of relationships: direct vendor-to-investor transactions, estate agents’ pocket listings offered to preferred buyers before public marketing, sourcing agents connecting investors with motivated sellers, solicitors and accountants aware of clients looking to dispose of property, and probate sales where executors want speed over maximum price. At the investment end of the market, buy-to-let properties, HMO portfolios, multi-unit freehold blocks, commercial conversions, the off-market proportion is even higher. Many of these assets never make sense on Rightmove because the buyer pool is specialist. An 8-unit freehold block in Burnley doesn’t benefit from 30,000 Rightmove browsers; it needs three serious investors who understand the numbers. That’s an off-market deal by nature.
Why vendors sell off-market
Understanding why vendors choose to sell privately is the key to understanding how to find them. It’s rarely about secrecy for its own sake. It’s about solving a problem that the open market can’t solve, or solving it faster.
Speed and certainty
The average time from listing to completion on the open market is 5 to 6 months. A chain collapse, which kills a large share of agreed sales, with published estimates ranging from about a quarter to more than half depending on the source and period, resets the clock. Off-market vendors who accept a lower price in exchange for a faster, chain-free completion aren’t irrational; they’re making a calculated trade-off. A landlord facing a £10,000 EPC upgrade bill and a mortgage rate increase might rationally accept a below-market price to exit in six weeks rather than six months.
Discretion
Not every vendor wants the world to know they’re selling. Divorce settlements, business disputes, debt-related disposals, and probate situations all create scenarios where privacy has genuine value.
Testing the market
Some vendors use an off-market period to gauge interest before committing to full public marketing. If they get an acceptable offer quietly, they save on estate agent marketing costs, portal fees, and the disruption of viewings. If they don’t, they can still go to market publicly without the listing looking stale.
Avoiding the digital footprint
A property that sits on Rightmove for months, with price reductions visible in the listing history, develops a stigma. Vendors who are unsure about their asking price increasingly prefer to test off-market first, preserving the option of a fresh public launch if the private route doesn’t work.
Landlord portfolio exits
This is the fastest-growing source of off-market supply in 2026, and it’s being driven by regulation. Landlords exiting the private rented sector, motivated by the Renters’ Rights Act, the EPC Band C deadline, Section 24 tax restrictions, and rising compliance costs, often prefer to sell their portfolios quietly to another investor rather than vacating tenants, refurbishing, and listing on the open market. Landlord exits have run at pace since Section 24 began phasing in from 2017, and many of those disposals happen privately, investor to investor. We have not found a single published cumulative figure for total exits since 2016, so we are not quoting one.
The investor advantage in the data
Off-market property UK deals aren’t just about access, they’re about economics. The numbers consistently favour the buyer. Price is negotiable, but the discount is not a market constant. Off-market pricing is not centrally measured and we are not going to quote you a percentage we cannot evidence. A genuine discount appears where a seller is trading price for speed and certainty, which is common in probate, distress and portfolio exits. The same channel also carries prime sales going at or above asking price, because the seller avoids a public price-reduction trail: Hamptons found off-market homes achieved 99.5% of asking in 2022 against 99.1% for openly marketed ones. Treat any specific discount quoted at you as a claim to test against comparables, not as a feature of the channel. Reduced competition. A property listed on Rightmove attracts dozens or hundreds of enquiries within hours. An off-market deal might have one or two interested parties. You’re not bidding against other buyers, you’re solving the vendor’s problem. Better structuring opportunities. Off-market vendors are often more flexible on terms. Delayed completions, vendor finance arrangements, and lease-back agreements are all more achievable when you’re dealing directly with a motivated seller. First-mover advantage. In a market where 1.2 million transactions completed last year the advantage sits with investors who can see stock before it is publicly listed, simply because fewer bidders see it at that stage. The flip side, and we’ll be honest about this, is that off-market deals require more due diligence, not less. Without the structure of an estate agent’s marketing pack, you may receive less information upfront. Our due diligence checklist was built precisely for this, 50 checks that cover every angle, whether the property came from Rightmove or from a direct vendor introduction.
The property types that trade privately
Not everything sells quietly. Certain types of off-market property UK investors target dominate the private channel. Landlord portfolio disposals. Single buy-to-lets, small HMO portfolios, and multi-unit freehold blocks where the vendor is an existing landlord looking to exit. These are the bread and butter of off-market investment transactions. Probate properties. When a property passes to executors or beneficiaries who don’t want to manage a rental, the priority is usually speed and simplicity. Probate properties are disproportionately represented in the off-market channel, and they often come with below-market pricing. Properties with issues. Short leases, failed EPCs, incomplete building control sign-off, structural problems, sitting tenants, complex title, these are properties that estate agents struggle to sell on the open market. For sophisticated investors who understand how to price and resolve these issues, they represent opportunity. Commercial-to-residential conversions. Buildings with permitted development potential under Class MA, or full planning consent for conversion are increasingly sold off-market to developers and investors who can move quickly. We list relevant opportunities on our development land opportunities page. Multi-unit portfolio acquisitions. The larger the transaction, the more likely it is to happen off-market. A £2 million portfolio of 12 flats across two freehold blocks doesn’t benefit from a Rightmove listing. It needs a targeted introduction to a small number of qualified buyers with the capital and expertise to transact.
Why off-market is accelerating in 2026
Three regulatory and market forces are converging to push more off-market property UK-wide than ever before.
1. The Renters’ Rights Act, in force since May 2026
Section 21 no-fault evictions are abolished, serving one now risks a civil penalty of up to £7,000. All tenancies are now periodic. Landlords who want to sell with vacant possession now need to use Ground 1A, which requires a 4-month notice period that cannot expire before the tenancy is 12 months old, meaning the earliest a landlord can serve notice is around the 8-month mark. The faster route is to sell off-market to another investor who will take the tenants on. No vacant possession needed. No void period.
2. EPC 2030: The upgrade-or-sell cliff
The Warm Homes Plan, published in January 2026, sets out a policy commitment to require EPC Band C across privately rented homes from 1 October 2030 with an expected £10,000 landlord cost cap. The implementing regulations have not yet been laid, and DESNZ guidance still describes the detail as under development, so the only legally enforceable minimum today remains EPC Band E capped at £3,500, landlords facing upgrade costs of £5,000 to £10,000 per property are making a decision: invest the capital and stay, or sell now before the deadline bites. Those who choose to sell overwhelmingly prefer off-market disposals.
3. The SDLT squeeze on returns
With the additional property surcharge now at 5% and the nil-rate threshold back at £125,000, every pound of acquisition cost matters more than ever. Our SDLT guide sets out the full impact. Where an off-market seller is genuinely trading price for speed, the discount is the difference between a deal that hits your target return and one that does not. Where they are not, there is no discount at all, which is why the price has to be tested against comparables on every deal rather than assumed from the channel.
Where off-market deals cluster
Off-market property UK activity isn’t evenly distributed. It concentrates in specific geographies and price bands. The North of England and Midlands. The highest volume of off-market investment transactions happens in the regions where landlord density is greatest and entry prices are lowest. Manchester, Liverpool, Leeds, Birmingham, Sheffield, and Newcastle, the same cities that top our yield map, also generate the most off-market deal flow. Coastal and ex-industrial towns. Blackpool, Burnley, Hartlepool, Grimsby, Stoke, towns where landlord exits are driven by thin margins and regulatory pressure, produce a disproportionate volume of off-market stock relative to their size. Prime central London. At the other end of the spectrum, the prime London market runs a high off-market share, driven by buying agents, private offices and relationship-based introductions rather than sourcing agents. Hamptons puts the off-market share above 50% for homes over £2m nationally. We have seen higher figures quoted for prime central London specifically and have not been able to trace them to a published source, so we are not repeating one.
How to access off-market deals
There is no shortage of advice online about how to find off-market property, and most of it is vague, impractical, or designed to sell you a course. Here’s what actually works for finding off-market property UK-wide. Work with a regulated sourcing agent or property broker. This is the most reliable route for investors who don’t have time to build their own vendor networks. The critical requirement: they must be registered with The Property Ombudsman or the Property Redress Scheme, and registered with the ICO for data protection. At Black Book, we’re registered with The Property Ombudsman and the ICO, and every deal we present has been through our full due diligence process. Build direct relationships with local estate agents. Register your buying criteria with 10 to 15 agents across your target areas. Be specific: property type, price range, yield threshold, whether you’ll accept tenanted stock. Agents holding a pocket listing will call their registered buyers first. Direct-to-vendor marketing. Letter campaigns to property owners in target areas, identified through Land Registry data, can generate leads. Response rates are typically around 1%, so this is a volume game, 300 letters might yield 3 genuine leads. Network within the investment community. Property investment meetups, online forums, and investor WhatsApp groups are all channels where deals circulate before reaching the broader market. Solicitor and accountant referrals. Solicitors handling probate, divorce, and debt situations are often the first to know about forced disposals. Building relationships with these professionals can generate high-quality off-market introductions.
The due diligence that matters
Off-market deals carry a specific due diligence requirement that open-market purchases don’t. When you buy from Rightmove, the estate agent has typically prepared an EPC, floor plans, the property information form, and comparable evidence. When you buy off-market, you may receive none of that. That’s why we built our due diligence checklist as a companion to our sourcing work. Every one of the 50 checks applies to off-market deals, but some are especially critical: building control sign-off, which is often missing on converted properties; the EPC rating, which is often worse than claimed; HMO licensing status, which is often expired or was never obtained; and tenant deposit protection, which is often missing in informal landlord portfolios. The discount you secure on an off-market purchase is only valuable if the property doesn’t come with hidden liabilities that wipe it out. Due diligence isn’t optional, it’s the price of admission.
When selling off-market makes sense
This report is primarily written for investors, but if you’re a vendor reading this, the off-market route might be right for you if: You own tenanted investment property and want to sell without disrupting your tenants or creating void periods. You’re facing EPC upgrade costs you’d rather not invest. You’ve inherited property and want a fast, simple disposal. You’re restructuring a portfolio and want to sell multiple assets in a single transaction. You value discretion and want to avoid public marketing. If any of that applies, we can help. We connect vendors directly with our qualified investor network, and we offer a free, confidential property valuation with no obligation to proceed.
What this means for property investors
The off-market property UK sector isn’t a niche, it is a parallel market operating at real scale. On our own arithmetic against the Hamptons and TwentyEA percentages, somewhere between roughly 80,000 and 190,000 UK transactions a year complete without having been openly marketed. That is our sum on someone else’s percentages, not a measured statistic. The proportion is growing, driven by landlord exits, regulatory pressure, and the fundamental economics of speed and discretion. For investors, off-market access isn’t a luxury, it’s a competitive advantage. Reduced competition and flexible structuring are the reliable advantages of the off-market channel, and where a seller is trading price for certainty the entry price improves too. Together they help returns at a time when higher SDLT, tighter regulation, and rising compliance costs are squeezing margins from every other direction. At Black Book Investments, off-market sourcing is all we do. Every property we present to investors has been sourced privately, analysed against our investment criteria, and verified through our full due diligence process. We’re registered with The Property Ombudsman and the ICO, and we connect investors directly with vendors, no middlemen, no portal markups. Browse our current off-market stock. Explore multi-unit portfolios. Or get in touch to register your investment criteria and get access to deals before anyone else sees them.
This article was originally published on 13 March 2026 and last updated on 13 August 2026 to reflect current market and regulatory conditions. Black Book Investments does not provide tax or legal advice. For landlord guidance and membership resources, visit the NRLA. Always verify current SDLT rates on GOV.UK and consult a qualified adviser before making acquisition decisions.