Off-Market UK Property Sourcing · London

Build a portfolio that outlasts the market.
Not one that eats your evenings.

Off-market deals, fully vetted and matched to your strategy, delivered to your inbox as a decision-ready pack. Verified numbers. Honest risks. Clear exits. I'm Eliseo Boyon, and if a deal doesn't survive my due diligence, you never see it. Your job shrinks to one thing: deciding.

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Which One Are You?
I'm an

Investor / Landlord

I want vetted off-market deal flow without the workload.

Get vetted deals → We're a

Family Office / Syndicate

We deploy serious capital and need institutional-grade packs.

See our standard → I'm a

JV / Capital Partner

I have capital or capability and want structured partnerships.

Explore structures → I'm a

Vendor / Developer

I need a discreet, certain sale to proceedable buyers.

Sell privately →
0%Vetted before presentation
0hrTypical analysis turnaround
0+Due-diligence checkpoints
Why This Exists

Here's what I kept seeing in UK property sourcing: glossy deal sheets with optimistic rents, refurb budgets plucked from thin air, and "below market value" claims with no comparables attached. Investors were being sold excitement, then left alone with the consequences.

Property rewards discipline, not activity. The best deal I can do for you is often the one I tell you not to touch.

So I built Quantum Brick to work the other way round. I start with the hard questions. What would a surveyor say? What happens if the refurb overruns by 20%? What's the exit if the market cools? A deal only reaches you once it has answers. And you get the full working, not just the conclusion. Check my numbers. Challenge my assumptions. That's the point of showing them.

What Changes For You

From where you are
to where you're trying to get

You are a

Private Investor or Portfolio Landlord

Before

Evenings lost on Rightmove. Deals that look fine until you run the real numbers. No time to source, and no way to verify what sourcers send you.

With Quantum Brick

Off-market opportunities matched to your criteria land in your inbox already stress-tested, with the evidence attached. You spend your time deciding, not digging.

Join the network. It's free

You are a

Family Office or Syndicate

Before

Deploying serious capital means serious diligence, and most sourcing packs wouldn't survive five minutes in front of your board or advisers.

With Quantum Brick

Institutional-grade packs you can take straight to your broker, lender or board: modelled scenarios, verified comparables, written risk disclosure, discretion throughout.

See the pack standard

You are a

JV Partner or Capital Partner

Before

You have capital or capability, but it's hard to find the right structured opportunity with a partner who documents everything properly.

With Quantum Brick

Joint ventures, lease options and staged acquisitions structured alongside professional advisers, with roles, returns and risks agreed in writing before anyone commits a pound.

Discuss a partnership

You are a

Vendor or Developer

Before

Public listings, broken chains, tyre-kickers and months of wasted viewings, when what you need is a discreet, certain sale.

With Quantum Brick

Your property is presented privately to a small number of qualified, proceedable buyers whose criteria it genuinely fits. Quiet, fast, certain.

Submit your property privately

The Deliverable

This is what lands in your inbox

  • The full financial model. Purchase, refurb line items, fees, finance costs, and what's left for you.

  • Comparable evidence. Actual sold prices and achieved rents, with sources. Not "similar properties in the area."

  • A clear exit, stress-tested. Your route out, modelled, with the honest answer to "what if it goes wrong?"

  • Written risk disclosure. Every deal has risks. Ours are listed, not buried.

  • My fee, upfront. You'll know exactly what I earn before you commit to anything.

Take it to your broker. Show it to your solicitor. That's what it's for.

A Quantum Brick investment deal pack on a desk

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Specimen · Illustrative
Deal Pack · Example Format
3-Bed Terrace · BRRR · North West England
Asking price£142,000
Agreed price (direct-to-vendor)£126,500
Refurbishment (itemised, +10% contingency)£24,200
Purchase costs, fees & finance£11,300
End value, 5 sold comparables attached£195,000
Rental appraisal, 3 agent opinions£925 pcm
Exit · Refinance & holdModelled ✓
Downside · Market cools 10%Still viable. Shown ✓
Risk register & disclosuresPages 6 to 8
Specimen for format illustration only. Not a live opportunity, an offer, or financial advice. Every real pack carries deal-specific figures, sources and disclosures. Always take independent advice.
How It Works

Five steps. You're in control at every one.

We talk first

A focused conversation about your strategy, target returns, locations and capital position. No forms pretending to be relationships.

I source & filter hard

Direct-to-vendor campaigns, agent relationships and area analysis. Most opportunities never pass my desk.

The deal earns its pack

Full numbers, comparables, costings and risks, compiled only once a deal survives scrutiny.

You decide, on evidence

The pack reaches the few investors it genuinely fits. Interrogate everything. Pass freely. I'd rather you skip ten than take one wrong one.

Supported to keys

I coordinate solicitors, brokers and agents until completion. One accountable contact, a full delivery chain behind me.

BMV AcquisitionsBRRRHMOLease OptionsJoint VenturesFlipsRent-to-RentLease Extensions
Eliseo Boyon, founder of Quantum Brick Ltd
A Note From the Founder

I put my name on every pack.
That should tell you something.

Quantum Brick is a young company, and I won't pretend otherwise. What I can promise is this: I will never show you a deal I haven't torn apart first, I will never hide a fee or a risk, and I will never pressure you to proceed. A business built on one rushed deal isn't a business. It's a countdown.

My background is in systems and disciplined process, and I've brought that into property deliberately: repeatable due diligence, documented assumptions, and a hand-picked professional network of conveyancing solicitors, mortgage and bridging brokers, RICS surveyors and agents across my target markets, all executing behind one accountable point of contact. Me.

If you're building a portfolio for the next decade rather than chasing the next deal, we'll probably get along. The first conversation costs nothing and commits you to less.

Eliseo Boyon
Founder, Quantum Brick Ltd · London
The Investor Network

Vetted deals find you.
You commit to nothing.

Free to join. Deal flow matched to your strategy, never a mass blast. You review each pack on its merits, proceed only if it fits, and my sourcing fee is disclosed in full before any commitment.

Your details are never sold or shared. GDPR-compliant. Unsubscribe in one click.

The Offer

One transparent fee.
Everything included. Nothing until you proceed.

Joining the network, receiving deal packs, and every conversation along the way costs you nothing. A sourcing fee applies only when you choose to proceed with a deal, and you'll have it in writing before any commitment.

Sourcing fees start at £5,000 and are quoted per deal, reflecting the value, complexity and work behind each opportunity. Joint ventures and creative structures are priced individually as part of the agreement, with independent professional advice on all sides.

Your Fee Includes
Off-market sourcing & negotiationIncluded
Full deal pack & financial modelIncluded
Comparable evidence & costingsIncluded
Stress-tested exit strategyIncluded
Coordination to completionIncluded
Fee starts at£5,000 per deal
Straight Answers

The questions you should be asking

What does it cost me?

Joining the network and receiving deal packs costs nothing. I earn a sourcing fee only if you choose to proceed with a deal. Fees start at £5,000 and are quoted per deal, reflecting the value and complexity of each opportunity, and you'll see your exact fee in writing before you commit to anything.

How do I know your numbers aren't optimistic?

Because I show my working. Every pack includes the actual comparable sales, agent rental opinions with names attached, itemised refurb costs with contingency, and a downside scenario. If you find a hole in my numbers, tell me. That conversation makes both of us sharper.

You're a new company. Why should I trust you?

You shouldn't. Not on my word alone, anyway. That's exactly why everything I present is verifiable: sourced comparables, written disclosures, professional advisers on every transaction, and no pressure to proceed. Judge me on the quality of the first pack I send you. It costs you nothing to look.

How do you find off-market deals?

Direct-to-vendor campaigns, long-standing agent relationships, developer contacts and targeted area analysis. Most of what I present never reaches Rightmove or Zoopla.

Am I obliged to take deals you send?

Never. Review each pack on its merits and proceed only when something genuinely fits your strategy. I'd rather you pass on ten deals than take one wrong one.

How do joint ventures work with you?

Where a deal suits it, I structure JVs, lease options and staged acquisitions alongside professional advisers, with roles, contributions, returns and risks agreed in writing before anyone commits. Independent legal and financial advice is always required for these structures.

Are you properly registered and compliant?

Yes. Quantum Brick Ltd operates with written terms, transparent fees, redress scheme membership, ICO registration and HMRC anti-money-laundering supervision, with professional indemnity insurance in place. Registration numbers are in the footer. I encourage every client to take independent legal and financial advice.

I'm a vendor. Why sell through you?

Discretion, certainty and speed. Your property is presented privately to qualified, proceedable buyers. No public listings, no chains, no wasted viewings. Tell me about the property and I'll respond within one working day.

Start the Conversation

The next decade of your portfolio
starts with one conversation