Nationwide Coverage

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Made in the UK

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40 Year Heritage

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Unique Patented Products

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Extensive Warranties

Period building repairs & renovations for commercial sectors

Traditional windows are an essential feature of period architecture. They add value, charm and enhance the surrounding architecture too. Therefore, Ventrolla understands how important it is to properly maintain them, fulfilling aesthetic, historic and regulatory responsibilities.

Over four decades, we've worked closely with English Heritage, Historic England, Cadw, Historic Scotland and local planning offices when advising on renovation works for listed buildings, Areas Of Outstanding Natural Beauty (AONBs), and those within conservation areas. We are highly experienced at carrying out work in phases to suit all commercial projects and timescales too. Getting Ventrolla involved at the early stage of your project means we can produce a full condition report outlining all options available. Our team will help with your tender by providing our detailed specifications and precise window section drawings.

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See our RIBA CPDs, NBS Source & RIBA Product Selector

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Window renovation with expert project management

Our team are on hand to guide you through the window renovation process:

  • Guide Price & Budget Costs
  • CAD Design
  • Supporting Specifications & Documentation
  • Project Management
  • Project Staffing including Sub-Trade Vetting and Management
  • After Care
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Tailored commercial planning expertise

Taking into consideration that schools require refurbishment work to be carried out during the holidays and hotels need tailored work schedules to fit around seasonal bookings, each project is assigned a dedicated Commercial Project Manager to oversee and fulfil your specific project on time and within budget.

We’re the nation’s ‘go-to’ timber window specialist  – so, if you need expert advice, a budget price, or a site survey for your commercial project, you’re in the right place!

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Our commercial planning process & timescales

1. Consultation

The Ventrolla journey begins with a consultation with our surveyor to discuss the project, establish a budget, and arrange a site survey.

2. Estimate or Budget Price

Once we’ve taken a look at your project specifications, bill of quantities and window schedules, we can provide you with either a budget price or site inspection and estimate. Using your tender documents, we will provide a window-by-window quotation to match your window reference numbers and elevation drawings. Survey to estimate takes no longer than 3 working days from the date of the survey.

3. Design

Following receipt of written confirmation to go ahead, we can provide you with a range of installation dates to suit your schedule. If new joinery is required, a Technical Survey will also be organised. Creating your unique vision in our UK-based manufacturing facility takes around 30 days.

Sash window removal system

4. Installation

As your commencement date approaches, your dedicated Project Manager will keep you updated on the progress every step of the way. Depending on the project, our installation target is 6 weeks.

5. Aftercare

Completing a comprehensive snagging list before sign off, our skilled commercial team will make sure you are happy with the renovation work and answer any questions you may have.

6. Guarantee

Once we receive your final payment, our ‘Care Pack’ will be sent to you or your client. This includes handy Maintenance Instructions, our 5-year guarantee, and energy improvement certificates for absolute peace of mind.

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What our customers are saying

Ventrolla were able to beat all the other quotations that I received and answered queries quickly and informatively, making changes as required promptly and without fuss. I was kept informed throughout of lead times and manufacturing times. The real stars of the show were Rob and James who worked tirlessly and brilliantly as a team to repair sash boxes where required and install our new sashes. Thank you!


Everybody I dealt with has been super friendly, informative, and helpful. I received emails with updates on what was happening, etc. It has been a great experience from start to finish.


I used Ventrolla to renovate my sash windows over to years ago. When two of them finally collapsed, including a bay window the size of three full sized Georgian windows they were my first contact. The office staff, surveyors and the three fitters that did an amazing job installing them in less than two days were all excellent. The quality of workmanship and the standard of installation were first class, and the new windows look amazing. I will definitely be using them again as more of my windows will need replacing over the next few years.


This is the second property Ventrolla have restored my windows for me, and the this job was every bit as good as the first. 14 sash windows in a Grade II listed building installed/refurbed without a hitch in week. The team of 4 installers were lovely chaps, super efficient and tidy. All round another fabulous job done – thank you the Ventrolla Team


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