---
title: "What are floor space and valuation split requirements for commercial mortgages?"
description: "Floor space %: Some lenders might have a minimum percentage that they would like to be residential, for instance, 60%."
url: "https://mortgagelane.com/guides/commercial-mortgages/what-are-floor-space-and-valuation-split-requirements-for-commercial-mortgages"
site: "Mortgage Lane"
collection: "guides"
date: "2026-08-04"
author: "Written by an adviser at Mortgage Lane"
category: "Mortgage guide"
reviewed: "2026-08-04"
reading_time: "2 min"
byline: "Written by an adviser at Mortgage Lane"
author_credentials: "CeMAP · FCA authorised firm"
language: "en-GB"
robots: "index,follow"
---

# What are floor space and valuation split requirements for commercial mortgages?

Floor space %: Some lenders might have a minimum percentage that they would like to be residential, for instance, 60%.

Floor space %: Some lenders might have a minimum percentage that they would like to be residential, for instance, 60%.

[Commercial mortgage](https://mortgagelane.com/definitions?term=commercial-mortgage)

Commercial

An asset-backed loan secured against commercial, semi-commercial or large-scale investment property, assessed on income sustainability, asset risk and valuation methodology rather than personal affordability alone.

[Read the full definition of Commercial mortgage](https://mortgagelane.com/definitions?term=commercial-mortgage)

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[Commercial Mortgages](https://mortgagelane.com/mortgages/commercial-mortgages)

Related definitions

[Commercial mortgage](https://mortgagelane.com/definitions#def-commercial-mortgage)

## What are floor space and valuation split requirements for commercial mortgages?

Floor space %: Some lenders might have a minimum percentage that they would like to be residential, for instance, 60%. Valuation split between residential and commercial: Certain lenders might prefer a valuation split ratio of 50/50. Some commercial properties may have only one access point, presenting a more intricate lending scenario. Ideally, properties should have two entrances, but we offer lending solutions for both configurations. For those new to commercial mortgages or non-homeowners, options might be limited. The specific use of the commercial unit(s) can also influence lending options, as the commercial realm contains various sub-sectors. Not all lenders might cater to every sub-sector, such as gyms or car garages. Hence, providing comprehensive information to your broker is crucial to avoid potential declines.

## Talk it through with an adviser

Speak to a Mortgage Lane adviser about your circumstances and the next steps.

Published: 2026-08-04

Last reviewed: 2026-08-04

Source: https://mortgagelane.com/guides/commercial-mortgages/what-are-floor-space-and-valuation-split-requirements-for-commercial-mortgages