How Costwise makes money
Costwise is free to use. We earn in three ways, and only when you choose to act: a fee if you use a quote partner we introduce you to; occasional affiliate commission on marked links; and the price of our optional Renovation Project Pack or one of our planners on Etsy if you buy it. None of them ever changes the prices or advice you see.
Installer quotes (lead generation)
On the double glazing, bay window and conservatory roof replacement guides and the 2 cost calculators for the same jobs, the quote form is one we run. It sends what you enter straight to Compare Companies (Leads2Trade Ltd), which pays us when it passes a request on to installers; we keep no copy. Apart from that form we never collect or pass on your details. On 10 guides, and the 2 cost calculators for the same jobs, the form on the page belongs to Leads Do Work and you fill in theirs; on the other pages that offer quotes, the button links to Bark and you fill in theirs. If that leads to a job, they may pay us a fee for the introduction. You are never charged, and we never store your information.
Affiliate links
On a few pages we link to suppliers: a fixed online price for a new boiler, and building materials from Materials Market on our materials calculators and a few do-it-yourself guides. If you buy through one of those links we may earn a commission, at no extra cost to you. Those links are marked, and they never affect our price guides, our quantities or which option we suggest.
Our Renovation Project Pack
We sell one product: the Renovation Project Pack, a £29 set of templates for running a renovation, sold through Whop, which processes the payment. Its Plan sheet prices a project from the same guide figures this site publishes, and nothing on this site is written or priced to sell it: every guide, calculator and free download stays free whether or not you buy it.
Our planners on Etsy
We also sell spreadsheet planners, including the project pack, on our Etsy shop, CostwiseUK, where Etsy runs the checkout and takes the payment. A few pages here carry a short, plainly worded note about the one that fits the page, set below the page's own advice and apart from any quote button, and the guides, calculators and free downloads stay free.
What we do not do
We do not take payment to change a price, rank a supplier higher, or write a fake review. Our figures are independent. Read how we price for the detail.