The Mortgage Works
A United Kingdom specialist mortgage lender and Nationwide Building Society subsidiary focused primarily on buy-to-let finance. A mortgage company in the UK
Last updated October 30, 2026
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Overview
The Mortgage Works is a United Kingdom mortgage-lending brand operated by The Mortgage Works (UK) plc, a specialist subsidiary of Nationwide Building Society. Its principal focus is buy-to-let mortgage finance, serving landlords and property investors who borrow against residential property intended for rental rather than owner occupation. The business is based in Bournemouth, Dorset, and operates within the United Kingdom mortgage market. The brand has its origins in Sun Bank. Portman Building Society acquired Sun Bank in 2001 and subsequently renamed it The Mortgage Works in 2004. This change established the identity under which the specialist lender became known in the intermediary mortgage market. In 2007, Portman Building Society merged with Nationwide Building Society. Following that transaction, The Mortgage Works continued to trade under its own name as a separate subsidiary within the Nationwide group rather than being absorbed into Nationwide’s main retail brand. The Mortgage Works primarily reaches borrowers through regulated mortgage intermediaries, including mortgage brokers, while also maintaining online and direct-customer channels. Its specialist positioning distinguishes it from a general retail bank or building-society mortgage proposition: the brand is particularly associated with lending criteria and products designed for buy-to-let borrowers. Its offering nevertheless includes residential mortgage finance as part of its broader mortgage business. As a subsidiary of Nationwide, The Mortgage Works operates within the United Kingdom’s regulated housing-finance environment and is connected to the wider Nationwide group, but it retains a separate customer-facing identity. Public reference material identifies the company as active and focused on mortgage lending; the available sources do not establish a standalone public listing, an independent stock-market ticker, a precise founding year, or a current named executive team. Its principal business significance lies in its specialist role in the UK buy-to-let market and its distribution through specialist intermediaries.
History
The Mortgage Works developed from Sun Bank, a specialist mortgage lender that was acquired by Portman Building Society in 2001. The acquisition brought the business into the Portman group and provided the basis for its later development as a dedicated mortgage brand. In 2004, Portman renamed Sun Bank The Mortgage Works, creating the name used by the business today. The renamed lender was positioned as a specialist mortgage provider rather than as a broad consumer banking brand. Its principal area of expertise became buy-to-let lending, a segment in which borrowers obtain mortgages on residential properties intended to be rented to tenants. This focus allowed the lender to serve landlords and property investors through a proposition distinct from conventional owner-occupier mortgage lending. A further structural change took place in 2007, when Portman Building Society merged with Nationwide Building Society. The Mortgage Works continued after the merger as a separate subsidiary and retained its own trading identity. It therefore became part of the Nationwide group while continuing to operate as a specialist lender under the The Mortgage Works name. The company is identified as The Mortgage Works (UK) plc and is based in Bournemouth, Dorset, England. The business has primarily worked through regulated mortgage intermediaries. This distribution model places brokers at the centre of the application and advice process, particularly for buy-to-let borrowers whose circumstances and property portfolios may require specialist underwriting. The brand also provides online facilities for broker applications and maintains a direct-customer web presence, according to its official web properties. The available reference material does not provide a confirmed original founding year for the business before its Sun Bank period, nor does it identify a founder, a detailed sequence of product launches, or a named current leadership team. It does establish the key institutional turning points: the acquisition by Portman in 2001, the change of name in 2004, and the transfer into the Nationwide group through the 2007 Portman merger. In its current form, The Mortgage Works remains an active UK specialist mortgage brand, chiefly associated with buy-to-let mortgage finance and intermediary distribution.
- 2007
Portman merges with Nationwide Building Society
[1]After Portman merged with Nationwide Building Society, The Mortgage Works continued to trade under its own name as a separate Nationwide subsidiary.
- 2004
Sun Bank is renamed The Mortgage Works
[1]Portman changed the Sun Bank name to The Mortgage Works, establishing the brand identity used by the specialist lender.
- 2001
Portman Building Society acquires Sun Bank
[1]Portman Building Society purchased Sun Bank, the specialist mortgage business from which The Mortgage Works later developed.
Products and positioning
A specialist United Kingdom mortgage lender with a strong focus on buy-to-let finance, distributed primarily through regulated mortgage intermediaries.
Mortgage lending
Buy-to-let mortgages
The Mortgage Works’ core product area is buy-to-let mortgage finance for landlords and property investors. These loans support the purchase or refinancing of residential properties intended to generate rental income. The brand is particularly associated with this specialist segment and distributes much of its proposition through regulated mortgage intermediaries.
Mortgage lending
Residential mortgages
The business also offers residential mortgage finance within its wider mortgage-lending activities. The available reference material does not specify the full current range of residential products, eligibility rules, rates, or repayment structures, so this entry records the category without assigning detailed features.
Mortgage distribution
Broker-distributed mortgage services
The Mortgage Works primarily works with regulated mortgage intermediaries. Its broker-facing operating model includes online facilities for applications and related services, making professional intermediaries an important route to market for its specialist mortgage products.
Recent events
The Mortgage Works launches limited company mortgages[3]
Reported:
The Mortgage Works launched limited company mortgages that include legal fees and a valuation. The new rates are available for remortgages and cover four products.
Sources3 sources
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