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Sam covers personal finance topics, from the best savings rates to the reasons mortgage lenders say no. He enjoys crunching the numbers to help consumers get ahead.
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Principality is a building society, which currently has around 500,000 members.
Here, you can find out what Principality mortgage customers thought about its service, what our expert analysis uncovered about its range of deals, and the best Principality mortgage rates on the market right now.
Please note that this article is for information purposes only and doesn't constitute advice. Please refer to the particular terms and conditions of a provider before committing to any financial products.
Why you can trust our Principality mortgage review
Real Principality customer views
We've asked 44 Principality Building Society mortgage customers about their experiences of the lender.
Expert mortgage rate analysis
We've analysed Principality's mortgage rates to work out if it's a lender that offers competitive deals.
Principality joins Nationwide and Skipton at the top of our table. Customers were particularly impressed with its clarity of mortgage statements and overall customer service. It missed out being a WRP with a below-average score in our interest rate analysis.
80%
out of 21 mortgage lenders ranked on customer score (joint 1st)
To see how Principality compares with other mortgage providers, head to the best mortgage lenders.
Which? analysed thousands of mortgages, using Moneyfacts data, over eight weeks in the summer/autumn of 2025. We compiled a series of top 10 cheapest deals tables based on a variety of borrowing scenarios, and counted how many times each lender featured in a table.
We found that Principality consistently offered a competitive rate for its two-year tracker for loan-to-value (LTV) deals between 80% and 95% over the period.
The average number of table appearances was five per week. Principality Building Society averaged just half of this, which meant for most mortgage scenarios, other lenders offered lower rates.
You can see the mortgage rates Principality currently offers first-time buyers, home movers and remortgagers in the tables below.
To see how Principality compares with rivals, see our guide to the best mortgage rates and deals, which is updated every day.
| 80% | Principality Building Society | 80% | 4.17% | £1,395 | 6.8% |
| 80% fee free | Principality Building Society | 80% | 4.37% | £0 | 6.8% |
| 90% | Principality Building Society | 80% | 4.95% | £1,395 | 6.8% |
| 90% fee free | Principality Building Society | 80% | 4.98% | £0 | 6.8% |
| 95% | Principality Building Society | 80% | 6.7% | £0 | 6.8% |
| 95% fee free | Principality Building Society | 80% | 6.7% | £0 | 6.8% |
Table notes: Data from Moneyfacts, updated daily. Customer score is based on a combination of overall satisfaction and likelihood to recommend the provider. The average customer score is 74%. The results are based on an online survey of 5,016 members of the public conducted in August/September 2025 and are representative of the GB/UK population (aged 18+). Providers must receive a minimum of 40 responses for inclusion in the results. Principality Building Society had a sample size of 44.
| 60% | Principality Building Society | 80% | 3.99% | £1,499 | 6.3% |
| 60% fee free | Principality Building Society | 80% | 4.32% | £0 | 6.3% |
| 75% | Principality Building Society | 80% | 4.02% | £1,499 | 6.3% |
| 75% fee free | Principality Building Society | 80% | 4.37% | £0 | 6.3% |
| 85% | Principality Building Society | 80% | 4.29% | £895 | 6.3% |
| 85% fee free | Principality Building Society | 80% | 4.48% | £0 | 6.3% |
Table notes: Data from Moneyfacts, updated daily. Customer score is based on a combination of overall satisfaction and likelihood to recommend the provider. The average customer score is 74%. The results are based on an online survey of 5,016 members of the public conducted in August/September 2025 and are representative of the GB/UK population (aged 18+). Providers must receive a minimum of 40 responses for inclusion in the results. Principality Building Society had a sample size of 44.
| 60% | Principality Building Society | 80% | 3.99% | £1,499 | 6.3% |
| 60% fee free | Principality Building Society | 80% | 4.32% | £0 | 6.3% |
| 75% | Principality Building Society | 80% | 4.02% | £1,499 | 6.3% |
| 75% fee free | Principality Building Society | 80% | 4.37% | £0 | 6.3% |
| 85% | Principality Building Society | 80% | 4.29% | £895 | 6.3% |
| 85% fee free | Principality Building Society | 80% | 4.48% | £0 | 6.3% |
Table notes: Data from Moneyfacts, updated daily. Customer score is based on a combination of overall satisfaction and likelihood to recommend the provider. The average customer score is 74%. The results are based on an online survey of 5,016 members of the public conducted in August/September 2025 and are representative of the GB/UK population (aged 18+). Providers must receive a minimum of 40 responses for inclusion in the results. Principality Building Society had a sample size of 44.
Find the right mortgage using the fee-free service provided by L&C Mortgages
Compare mortgagesIf you click on the link and complete a mortgage with L&C Mortgages, L&C is paid a commission by the lender and will share part of this fee with Which? Ltd helping fund our not-for-profit mission. We do not allow this relationship to affect our editorial independence. Your home or property may be repossessed if you do not keep up repayments on your mortgage.
We asked Principality mortgage customers about their experience with the lender.
Here's how they rated it on various aspects of service:
| Category | Star rating |
|---|---|
| Overall customer service | |
| Keeping you well informed (eg telling you about changes to interest rates) | |
| Clarity of mortgage statements | |
| Transparency of charges/penalties | |
| Flexibility of payments (eg being able to overpay/underpay/take payment holidays) | n/a |
| Online access (eg being able to access your account online or via an app) |
Table notes: Star ratings are out of five. The results are based on an online survey of 5,016 members of the public conducted in August/September 2025 and are representative of the GB/UK population (aged 18+). Providers must receive a minimum of 40 responses for inclusion in the results. 'n/a' means we didn't have enough responses to provide a star rating. Principality Building Society had a sample size of 44.
Along with our customer scores and star ratings, we also collect comments from real customers.
More than 90% of the responses we received were positive.
Customers praised the 'people-oriented' business with 'friendly staff' and 'excellent communication'.
When we checked in September 2025, there were 51 mortgages available from Principality Building Society. Most were fixed-rate deals, meaning your interest rate stays the same for a set initial period.
Principality mortgages had initial periods of two, three or five years.
Only four mortgages offered by Principality were tracker deals, with initial terms lasting two years before reverting to Principality’s standard variable rate.
Principality typically offers loans up to 4.49 times your income. Medical workers can qualify for loans up to five times their income, and newly qualified professionals up to 5.5 times their income.
First-time buyers can qualify for loans of up to 5.5 times their income.
Currently, Principality doesn’t offer preferential rates for energy-efficient homes or interest-free lending for green home improvements.
All of Principality’s mortgages allow a maximum term length of 40 years.
Why should you trust Which? research? We’re not influenced by third parties. We work entirely on behalf of you, the consumer – nobody else. See our statement of editorial independence
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