RegEx: Get Values from HTML Attribute Tags

I need to get the values from below following html snippet. So far I came up with this regex which helps me trim it down to the values I needed, but to automate this I need to join 2 regex statements to get the result "18" which is where I am stuck at. Or Please suggest a better method for me get the values.

I am using WebHarvey scraping tool. The program is based on .net but it doesn't support inserting .net code so I need only regex command.

First Regex Statement
(?s)(?<=attribute bathroom).+?(?=\/span)
Result:

" title="Bathrooms" style="  "><span class="value" style="  ">18<

Second Regex Statement
(?s)(?<=<span class="value" style=" ">).+?(?=<)
Result: 18

HTML Snippet

<ul class="iconContainer" style="  "><li class="attribute propertyId"><span class="value">xxx1</span></li><li class="attribute propertyType"><span class="value">Factory</span></li><li class="attribute bathroom" title="Bathrooms" style="  "><span class="value" style="  ">18</span></li><li class="attribute carspace" title="Car Spaces" style="  "><span class="value" style=" ">18</span></li><li class="attribute landArea"><span title="Land Area"><span class="value">5,010</span><span class="m2"><span class="unit">m2</span></span></span><span>|</span><span title="Floor Area"><span class="value">9,270</span><span class="m2"><span class="unit">m2</span></span></span></li></ul>