Keystone Property Finance
Keystone Property Finance is a UK specialist buy to let mortgage lender, founded in 2007, providing intermediary-only BTL financing for professional landlords across complex scenarios including HMOs, multi-units, ex-pat borrowers, holiday lets, semi-commercial properties, and limited company structures.
- Company typePrivate
- Founded2007
- HeadquartersWest Malling, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Keystone Property Finance does
Keystone Property Finance is a UK-regulated, intermediary-only specialist buy to let mortgage lender that has operated since 2007, transitioning from three prior joint ventures to become a principal lender in its own right in 2018. The company originates BTL mortgages for professional landlords across complex scenarios that mainstream lenders typically decline, including Houses in Multiple Occupation (HMOs up to 20 occupants), multi-unit blocks, semi-commercial properties, ex-pat borrowers, furnished holiday lets, limited company/SPV/LLP structures, and refurbishment-to-let projects. Lending parameters include up to £3 million per property, up to 80% LTV, portfolio facilities up to £15 million, and rates starting from 3.29%, with 2-year and 5-year fixed, 2-year tracker, and product transfer options. Revenue is generated through interest spread on originated mortgages plus non-refundable application fees (£199), tiered valuation fees (£345 to over £2,155), and solicitor/legal fees tied to loan size and structure.
The company's go-to-market is exclusively through approved mortgage brokers rather than direct-to-consumer, supported by a regional network of Business Development Managers and an internal sales team accessed via a dedicated phone line. Distribution is anchored on the proprietary MyKeystone broker portal (also referenced as KOS), which provides case submission, real-time status updates across pre-offer and underwriting stages, and integrations including DocuSign for electronic execution of mortgage offers and Direct Debit Mandates. In-house developed tooling layered onto the portal includes an AI-powered bulk document upload and auto-labelling system (up to 50 documents, multi-format), a case cloning feature for repeat clients, and automated Limited Company bank account verification that has demonstrably reduced document requests where over 80% of applications are limited company originated.
Keystone is a private limited company registered in England & Wales and operates as a wholly-owned subsidiary of The Property Business Group Limited. Headquartered in Kings Hill, West Malling, Kent, with headcount of over 90 employees, the firm is operationally carbon neutral and has received multiple industry awards including Best Specialist Lender and Best Buy to Let Lender from Personal Finance Awards, What Mortgage Awards, and Financial Reporter Awards across 2023 to 2025. The management team is built around functional specialisation (sales, commercial, underwriting, IT, risk, compliance, marketing, lending strategy, operations, data/ESG, product transfers), with a listed career page signalling continued organisational scaling.
Keystone Property Finance firmographics
Firmographics- Name
- Keystone Property Finance
- Legal name
- Keystone Property Finance Limited
- Website
- https://keystonepropertyfinance.co.uk
- Company type
- Private
- Founded year
- 2007
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Keystone Property Finance is a UK specialist buy to let mortgage lender, founded in 2007, providing intermediary-only BTL financing for professional landlords across complex scenarios including HMOs, multi-units, ex-pat borrowers, holiday lets, semi-commercial properties, and limited company structures.
- Ownership category
- akta.pro rank
Keystone Property Finance industry classification
Industry- Product category
- Specialist Buy to Let Mortgage Lending
- NAICS
- Real Estate Credit (522292)
- SIC
- Mortgage Bankers & Loan Correspondents (6162)
- akta.pro primary industry
- Purchase Mortgage Origination (Homebuyer Focused) (FSALAAAD)
Keywords
Where Keystone Property Finance is headquartered
LocationHeadquarters
- HQ city
- West Malling
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Keystone Property Finance business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Others
Revenue model
- Mortgage Lending Interest: Generates revenue through interest on buy to let mortgages provided to professional landlords. Offers products for individuals, limited companies, SPVs, and LLPs with rates starting from 3.29% and up to 80% LTV.
- Arrangement and Application Fees: Non-refundable application fee of £199 on all applications. Additional arrangement fees may apply based on loan amount.
- Valuation Fees: Valuation fees ranging from £345 to £1,745 depending on property value for standard BTL. Specialist HMO/Multi-unit fees range from £580 to over £1,605.
- Solicitor/Legal Fees: Lender solicitor supplementary fees including £149 for leasehold properties. Limited company fees range from £649 to £1,470 depending on loan size.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Standard Buy to Let - Valuation Fees |
| Unit Pricing | Pay-as-you-go | Specialist BTL HMOs/Multi-units up to 6 occupants - Valuation Fees |
| Unit Pricing | Pay-as-you-go | Specialist BTL HMOs/Multi-units 7+ occupants - Valuation Fees |
| One time/ perpetual license | Pay-as-you-go | Application Fee |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels10 records
Keystone Property Finance product offering
Product offeringCore offering
Keystone Property Finance is an intermediary-only specialist buy to let mortgage lender that underwrites and funds BTL mortgage products for professional landlords in the United Kingdom. Lending is delivered exclusively through approved mortgage brokers and supported by a proprietary broker portal (MyKeystone/KOS). Product coverage spans standard residential BTL, HMOs and multi-unit properties (up to 20 occupants/units), semi-commercial, expat borrowers, holiday lets, refurb-to-let and portfolio lending (up to £15m), at up to 80% LTV and per-property loans up to £3m.
Product overview
Keystone Property Finance is a specialist buy to let lender operating as an intermediary-only model, offering a unified platform of mortgage products designed for professional landlords and property investors. The product portfolio includes Standard and Specialist fixed-rate products for standard residential BTL as well as HMOs and multi-units; Semi Commercial for mixed-use properties; Ex-Pats for overseas borrowers; Holiday Lets for furnished short-term rentals; Refurb to Let for renovation projects; and 2 Year Tracker for variable-rate products. Add-on modules include Product Transfer and Product Transfer Plus for existing customers seeking to refinance or release equity. The company supports lending up to £3 million per property, up to 80% LTV, with individual, limited company, SPV, and LLP borrowing structures, and portfolio lending up to £15 million.
Differentiator
Problem solved
Functional benefit
Products and services
- Standard Buy to Let Standard fixed rate buy to let mortgage product for conventional residential rental properties, offered in 2 and 5 year fixed rate terms and distributed exclusively through approved mortgage brokers to professional landlords in the United Kingdom.
- Specialist Buy to Let (HMO/Multi-unit) Fixed rate specialist buy to let mortgage for higher-yielding complex properties including Houses in Multiple Occupation (HMOs) and multi-unit freehold blocks, with support for up to 20 occupants or units, distributed via approved brokers to professional landlords.
- Semi Commercial Buy to Let Commercial and semi-commercial property lending for mixed-use properties such as flats above commercial premises, distributed through approved brokers to landlords.
- Ex-Pats Buy to Let Buy to let mortgage product designed for expat borrowers, including self-employed and retired ex-pats, with criteria accommodating non-UK income and limited UK credit history, intermediated via approved brokers.
- Holiday Lets Specialist lending for furnished holiday let properties required to be available to let for at least 210 days per 365-day period, available to individual borrowers and limited company structures via approved brokers.
- Refurb to Let Financing product for refurbishment and renovation projects that convert properties to lettable condition, supporting landlords seeking to add value through property improvements, distributed via approved brokers.
- 2 Year Tracker Tracker mortgage product with a 2-year term offering variable rate pricing linked to the Bank of England base rate, available for professional landlords via approved brokers.
- Product Transfer Fixed rate product transfer option enabling existing Keystone landlord customers to switch to a new product at the end of their current term without full re-underwriting, intermediated via approved brokers.
- Product Transfer Plus Enhanced product transfer offering existing Keystone customers additional borrowing capability and a free physical valuation to support increased lending based on property value uplift, intermediated via approved brokers.
Quantifiable outcome
- 10 seconds to answer the phone on broker hotline
- +5 more outcomes
Companies that use Keystone Property Finance
Customer profileNamed customers4 records
Segments9 records
Ideal customer profiles2 records
Keystone Property Finance technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability4 records
Feature4 records
Keystone Property Finance partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- LMS (Lender Mortgage Services)corePartnership with LMS using their Panel Link service to provide a fully vetted, secure panel of solicitors for clients and borrowers. The panel is updated regularly. Separate representation for limited company cases is no longer required - solicitors for limited company cases can now be instructed via the LMS Panel Link.
Scale indicators7 records
Recent moves8 records
Expansion highlights6 records
Keystone Property Finance competitors and assessment
Company assessmentBroad incumbents
- Paragon Bank: Established UK specialist bank with a leading buy-to-let mortgage franchise alongside savings and commercial lending. Larger scale and broader product set than Keystone but directly overlapping in specialist BTL.
- Kent Reliance (OneSavings Bank): UK specialist lender offering BTL, residential, and commercial mortgages through intermediaries as part of OneSavings Bank. Overlaps with Keystone in specialist BTL but operates at larger scale with broader product portfolio.
Direct peers
- Landbay: UK peer-to-peer specialist BTL lender funding individual and limited company landlord mortgages through institutional and retail investors. Operates in the same intermediary-driven BTL niche with comparable product breadth.
- Fleet Mortgages: UK specialist buy-to-let lender focused exclusively on the intermediary channel, offering BTL products for individual and limited company landlords including complex borrower types. Directly comparable business model, distribution, and target customer base to Keystone.
- Precise Mortgages: Specialist UK mortgage lender (part of Charter Court Financial Services) offering BTL, residential, and bridging products through intermediaries. Closely comparable specialist BTL positioning and intermediary-only distribution model.
- Pepper Money (UK): UK specialist lender (subsidiary of Pepper Group) offering residential, BTL, and bridging mortgages via intermediaries for non-standard borrowers. Comparable specialist intermediary-only distribution and product focus.
- InterBay Commercial: UK specialist lender offering BTL, semi-commercial, and development finance through intermediaries. Directly comparable focus on complex BTL and semi-commercial cases via the broker channel.
- Foundation Home Loans: UK specialist mortgage lender offering residential, BTL, and bridging products through intermediaries. Targets complex borrower and property cases that mainstream lenders decline, making it a directly comparable specialist BTL peer.
- Together Money: UK specialist lender offering residential, BTL, bridging, and development finance through intermediaries, targeting complex cases mainstream lenders decline. Comparable specialist intermediary-led model.
Regional players
- Bath Building Society: UK building society offering BTL and specialist mortgage products through intermediaries with a smaller regional footprint. Operates in the same specialist intermediary BTL niche at a smaller scale.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
Keystone Property Finance social profiles
Digital presenceKeystone Property Finance financial estimates
Financial estimateRevenue estimate
Valuation estimate
Keystone Property Finance leadership team
Management profileNumber of profiles
Profiles13 records
Keystone Property Finance funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Keystone Property Finance M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Keystone Property Finance
What does Keystone Property Finance do?
Keystone Property Finance is an intermediary-only specialist buy to let mortgage lender that underwrites and funds BTL mortgage products for professional landlords in the United Kingdom. Lending is delivered exclusively through approved mortgage brokers and supported by a proprietary broker portal (MyKeystone/KOS). Product coverage spans standard residential BTL, HMOs and multi-unit properties (up to 20 occupants/units), semi-commercial, expat borrowers, holiday lets, refurb-to-let and portfolio lending (up to £15m), at up to 80% LTV and per-property loans up to £3m.
Is Keystone Property Finance a public or private company?
Keystone Property Finance is a private company. It is classified as corporate owned and is currently operating.
When was Keystone Property Finance founded?
Keystone Property Finance was founded in 2007. It employs 51 to 100 people.
Where is Keystone Property Finance based?
Keystone Property Finance is headquartered in West Malling, United Kingdom, in the Europe region.
How does Keystone Property Finance make money?
Four revenue lines are on record. Mortgage Lending Interest is the primary driver. The others are arrangement and Application Fees, valuation Fees and solicitor/Legal Fees.
Who are Keystone Property Finance's main competitors?
Broad incumbents on record are Paragon Bank and Kent Reliance (OneSavings Bank). Direct peers are Landbay, Fleet Mortgages, Precise Mortgages, Pepper Money (UK), InterBay Commercial, Foundation Home Loans and Together Money. Bath Building Society is listed as a regional player.
Does Keystone Property Finance have an API?
No public API is recorded for Keystone Property Finance.
What industry is Keystone Property Finance in?
Keystone Property Finance's product category is Specialist Buy to Let Mortgage Lending. Its primary akta.pro industry code is FSALAAAD, Purchase Mortgage Origination (Homebuyer Focused). Its NAICS code is 522292 and its SIC code is 6162.