Ashdevs - Builders & Property Services

Builders in Harrow (Middlesex)

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Marlborough House
159 High Street

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Contact Numbers


Opening hours

Monday to Sunday: 9am - 9:30pm

Key Services

extension, extensions and conversions, loft conversion


  • Reliable Quality Builders at Fair Prices
  • Builders you can Trust
  • Recommended and Trusted local Builders

Builders and Property Services - Trusted and Recommended

AshDevs brings you reliable, high quality building work at a competitive price.

We use trusted and highly recommended builders who work to high standards to complete your project.

All types of building work are undertaken including extensions, conversions, renovations and refurbs. Areas covered include most parts of London, Middlesex, Herts and Bucks.

Everything we do is about "RQTV": Reliability, Quality, Trust, Value. As a professional building services firm, our entire focus is to deliver on these four standards.

For your peace of mind, we provide independent checks and monitoring of your project to ensure high standards.

Read more about our RQTV standards on our website or call 0208 432 6618 or 07804 545 312. Alternatively, email We respond to all emails on the same day.

Trading Since








We used Ashdevs to arrange an extension for our house + a garage conversion. Completely happy about how it all went, from start to finish. Great builders who come thoroughly checked out to ensure they are trustworthy. Very reliable job done with all the builders extremely hard working and passionate about their work. End result is fabulous. Have already recommended Ashdevs to several of our friends. Best thing is Ashdevs will not only connect you with one of their trusted builders, but they stay with you on your project from start to finish, to make sure it all runs smoothly - and it all did ... Thanks guys!

Nik Jay - 17/09/2014 | report this review

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Products and Services

Builder Recommendation Service

AshDevs connects you with one of their recommended, highly competent local builders. But that's not all: once your work begins, AshDevs will stay with you all the way until completion, overseeing the project and ensuring all runs smoothly.

Builder Checking Serice

We do 10 background checks on all our builders to ensure they are trustworthy and honest. We investigate their company financial history, home address, landline telephone, key personnel, previous jobs, onsite spot-checks, reference checks, etc etc.

We offer these services

  • Free Estimate
  • Insurance Work
  • Extensions
  • Conversions
  • Outside Walls
  • Drives
  • Patios
  • Roofing
  • Restoration
  • Underpinning


We had heard about AshDevs through a very good recommendation. The work done was at a very high standard and the builders were thoroughly efficient and very very reliable. AshDevs monitored the work throughout and gave us very valuable tips that helped us and saved us money. We have already recommended Ashdevs to our other friends and they, too, have been highly impressed. It is not often we write reviews but these guys are brilliant. Decent price, too, for such a good job.

J P, Pinner

We had an extension and garage conversion done through Ashdevs. Fantastic job done and we highly recommend using them. Very good quality workmanship and highly reliable builders who did what they said and delivered. Price was fair & reasonable too. No issues whatsoever. We would highly recommend using Ashdevs for your work.

Mr Jay - Harrow

Testimonials are added by the business owner and are not independently verified.

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