Properties with five or more bedrooms, large plots, or values above 500,000 to 1 million enter a different lending landscape. Most mainstream lenders have upper limits on property value, and the quirks of large homes — from annexes to outbuildings — create valuation and survey complications.\n\nValue Thresholds — Most high-street lenders have maximum loan amounts between 1 million and 2 million. Above 1 million, lender options narrow. Above 2 million, private banks (Coutts, HSBC Private Bank, Handelsbanken, Investec, Arbuthnot Latham) become the primary option. Private banks offer bespoke terms but typically require minimum income of 300,000 or investable assets of 1 million-plus.\n\nLarge Properties and Acreage — Standard residential valuations cover the house and a garden of up to one acre. Additional land, outbuildings, stables, annexes, and agricultural buildings may not be included in the standard valuation or may require a separate assessment. Some lenders exclude the value of anything beyond the main dwelling and one acre, which can significantly reduce the LTV.\n\nAnnexes and Additional Dwellings — A property with an annexe raises questions about separate habitation. If the annexe has its own kitchen, bathroom, and separate entrance, some lenders treat it as a separate dwelling, which can trigger different lending rules and potentially the additional property stamp duty surcharge. Other lenders are comfortable if the annexe is clearly ancillary to the main house. Clarify with your lender before applying.\n\nSurvey Requirements — A Level 3 RICS Building Survey is strongly recommended for large or older properties. For properties valued above 500,000, most lenders require a physical valuation rather than an automated desktop valuation. For properties above 1 million, the valuer is typically a senior surveyor with experience in high-value residential. Expect the valuation to take longer and cost more (500 to 2,000).\n\nRunning Costs and Affordability — Lenders factor heating, maintenance, and insurance costs into affordability. A six-bedroom period property costs significantly more to run than a three-bedroom semi. If the property has a swimming pool, extensive grounds, or listed building maintenance obligations, these ongoing costs reduce borrowing capacity.\n\nPractical Advice — Get a whole-of-market broker experienced in high-value lending. Explore private banking options if the property exceeds 1.5 million. Confirm what the lender will and will not include in the valuation before instructing a survey. Budget for higher arrangement fees, which are typically percentage-based at this level.