Best of Houzz is an annual award from the home-renovation platform Houzz, given to the professionals its community rates most highly for design or customer service.
View award source (opens in new tab)Public evidence profile · Checked May 2026
The Market Design & Build
Planning history
21 public planning applications
Awards & recognition
1 independent award
Trust Score
55out of 100
- Rated 4.9 from 247 reviews
How this score is worked out
Rating4.9 / 5
Review volume247
Independent sources1 independent public source
CredentialsNo credentials shown yet
How this score is made up
What customers say45.2 of 60
Independent checks8.6 of 30
Track record1.3 of 10
See the independent checks
- Licences and credentials0 of 10.3
- Ways to reach them3.4 of 3.4
- Reviewed on more than one site0 of 5.1
- Registered company details0 of 5.1
- Photos of their work4.3 of 4.3
- Industry recognition0.9 of 1.7
Verified planning history
Missing evidence lowers the score because we can't check it. It doesn't mean it doesn't exist. Claiming a profile never changes the score. Evidence context, not a guarantee of workmanship.
Planning history
The Market Design & Build’s real planning history from public planning applications, showing where they’ve worked and how often schemes were approved. · Active 2018–2026
approval rate73%
planning applications21
approved schemes11
councils worked in4
What they work on
The kinds of project The Market Design & Build has filed planning applications for.
- Loft conversion2
- Rear extension15
- Side extension4
- Two-storey extension4
- Extension20
- Garage conversion1
- Conservatory / orangery1
- Balcony / roof terrace3
- Porch2
- Listed building / conservation1
- Demolition2
- Windows & doors2
- Roof / fenestration5
Where they’ve worked
Each pin is a planning application, coloured by the council decision we found.
Council experience
- Ealing · 11 applications since 2019See planning experience in Ealing
- Brent · 4 applications since 2018See planning experience in Brent
- Sutton · 4 applications since 2021See planning experience in Sutton
- Lambeth · 2 applications since 2020See planning experience in Lambeth
Recent planning applications
- Approved23B Princess Road, London, NW6 5QTListed building consent for replacement of side window, replacement of front window pane, new rainwater goods and internal reconfiguration to ground floor flat
- Approved37 Rosehill Avenue Sutton Sutton SM1 3HGApplication to vary condition 1 (approved drawings) of planning permission Ref: DM2021/00639 for the 'Erection of a two storey side extension and part one part two storey rear extension' to allow for the installation of a rooflight to the front roofslope of the two storey side extension.
- Approved37 Rosehill Avenue Sutton Sutton SM1 3HGConversion of loft space involving the removal of two chimney stacks and creation of a dormer extension to rear and installation of roof lights to front roof slope.
- No decision51 Whitton Avenue East Greenford Middlesex UB6 0QBSingle storey side/rear extension; single storey front extension; conversion of a garage into a habitable room including associated external alteration involving the insertion of a window in lieu of the garage door opening; single storey front porch extension involving construction of a canopy
- No decision32 Bridgman Road Chiswick London W4 5BDSingle storey side infill extension.
- Approved12 Fir Road Sutton SM3 9JYErection of a single storey front, side and rear extension.
- Refused37 Rosehill Avenue Sutton SM1 3HGErection of a part single storey rear, part two storey side extension and conversion of loft space involving a dormer to rear and three rooflights to front roof slope.
- Approved90 Norfolk House Road London SW16 1JHErection of a single storey ground floor L-shaped rear extension (to ground floor flat).
Show all 21 planning applicationsShow fewer planning applications
- Approved19A Glenfield Road London SW12 0HQErection of a ground floor side extension and insertion of new window to ground floor rear elevation. (Reconsultation due to amended Site Plan).
- Approved22 Pierrepoint Road Acton London W3 9JHSingle storey rear extension (Max 6m deep and Max 3m high) (42 days Prior Notification Process)
- Approved5 West Court, Wembley, HA0 3QQDemolition of existing garage and conservatory; erection of a single storey side and rear extension to dwellinghouse
- Refused29 Kingston Road Southall Middlesex UB2 4AWTwo storey rear extension
- No decisionGround Floor Flat 56 South Ealing Road Ealing London W5 4QASingle storey rear extension; replacement of window with door to ground floor rear elevation; installation of a window to ground floor side (south) elevation
- Approved19 Balfour Road West Ealing London W13 9TNRear roof extension incorporating a Juliet balcony, and installation of three roof lights to front roof slope (Lawful Development Certificate for a Proposed Development)
- No decision170 Popes Lane Ealing London W5 4NJPart single, part two-storey rear extension; provision of two car parking spaces in front courtyard; conversion of garage into habitable space including installation of window in lieu of garage door
- Approved19 Balfour Road West Ealing London W13 9TNSingle storey (Max 4m deep and Max 3m high) rear extension (42 days Prior Notification Process) following demolition of existing rear addition
- No decision22 Pierrepoint Road Acton London W3 9JHFirst floor rear extension incorporating juliet balcony; insertion of a first floor level window to side elevation; and installation of a door at first floor level in lieu of a window in the rear elevation
- Refused22 Pierrepoint Road Acton London W3 9JHSingle storey (Max 6m deep and Max 4m high) rear extension (42 days Prior Notification Process)
- Approved22 Pierrepoint Road Acton London W3 9JHSingle storey front porch extension; alteration of roof from hip to gable end; rear roof extension incorporating a Juliet balcony and installation of three roof lights to front roof slope (Lawful Development Certificate for a Proposed Development)
- Withdrawn79 Crest Road, London, NW2 7LYProposed single storey rear extension with linked garage conversion; installation of raised patio
- Refused33 Rushout Avenue, Harrow, HA3 0ASPrior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 4.14m Maximum height - 3m Eaves height - 3m
Independent recognition
Awards & recognition
These are independent third-party awards: recognition earned from review communities and trade bodies, never paid placement.
Source-listed gallery
5 photosPhotos listed on Houzz
These sources do not label every image as completed work. The gallery may include projects, people, logos or certificates, so it does not count as completed-work evidence.
Reviews · public evidence
What customers say
These review totals are published independently on the named public source below, not testimonials this business chose to show. We show the aggregate rating, review volume, and source attribution we hold so you can weigh the evidence yourself.
4.9out of 5
Where these reviews are published
- Houzz247 reviews · 4.9 avg
Local context
Rated 4.9, in line with the local average for builders in Middlesex
Across 148 builders in Middlesex, the typical rating is 4.8 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
Sources
1 named public sourceWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Public evidence last checked May 2026
About
The Market Design & Build is London’s leading home extensions and loft conversions company. Having undertaken hundreds of bespoke projects, including roofing, loft conversions, home extensions and new builds, we have established ourselves as one of the most dedicated and professional Design and Build companies in London and the surrounding areas. Unlike many other firms, we keep everything under one roof and offer a complete end-to-end service including the consultation, planning, design and execution of a project. We are a trusted and much sought-after company with many satisfied and returning clients who have kindly given us over 1,000+ positive reviews on Checkatrade and a 5-star rating on Google Reviews. Whether you are looking for a brand-new kitchen extension, a loft conversion or even a complete home refurbishment, The Market Design and Build London is here to assist you. Our professional in-house team have a wealth of knowledge and experience which we can use to help you build the property of your dreams.
Services they list
3D RenderingArchitectural DesignArchitectural DrawingsBasement ConversionBasement DesignDesign ConsultationGarage DesignHome RenovationHouse ExtensionsHouse PlansLoft ConversionNew Home Build
Listed on public sources or the business's own website; check directly that they cover your job before you book.
What this business says about itself
From their own website
What this business says about itself
See their work: Photo gallery (opens in new tab) · Houzz (opens in new tab) · Instagram (opens in new tab) · Facebook (opens in new tab)
- Experience they state: 10 Years
- Areas served: London
- Good to know: Free quotes · Design service
Accreditations it displays. Confirm each is current on the official register before you hire:
- Checkatrade · verify (opens in new tab)
These are statements the business makes on its own website, worth confirming in writing (and on the official registers) before you hire, not independently verified by us.
Independent checks
About this business
How long they've really been tradingThe earliest independent record of them trading is 2017, so at least 9 years. They appear in 2 separate independent sources.
Website online since2012Award-winning since2017Planning approvals since2018
Your own checks
What to check before you hire
Worth checking yourself
Their public evidence comes from a single source. Look them up on another site before deciding.
No credentials are shown here and the business has not claimed this profile. Ask to see certificates and insurance directly.
Verify at the sourceCheck them yourself
This trade isn't licensed in the UK, so anyone can set up. TrustMark is the only Government-endorsed quality scheme for work in and around the home - check whether they're registered, or find a TrustMark-registered business.
Check the TrustMark registerNever pay a large deposit up front. Agree a staged payment schedule tied to completed milestones, and hold a small retention until snagging is done.
Get it in writing: an itemised quote with scope, materials, start and finish dates, and how any changes (variations) will be priced.
Be wary of a cash-only price or pressure to start tomorrow. Both are red flags for an unaccountable job.
Want an extra legitimacy check? Run the Cowboy Checker on The Market Design & Build before you contact them.
Run Cowboy Checker →Good to know
Common questions about The Market Design & Build
Is The Market Design & Build a legitimate business?
The Market Design & Build has 247 independent public reviews, rated 4.9 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about The Market Design & Build?
The Market Design & Build has 247 public reviews, averaging 4.9 out of 5. The reviews section shows the aggregate rating, review volume, and review source information we hold.
How do I know The Market Design & Build's reviews are genuine?
The Market Design & Build's 247 public reviews come from a named public review source. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show the review source information and aggregate rating we hold rather than selling rankings, so you can weigh the evidence for yourself.
Has The Market Design & Build won any awards?
The Market Design & Build holds 1 independent award, including 9× Best of Houzz winner: 2017–2026 (Service). These are third-party awards: recognition that has to be won, not self-issued.
Has The Market Design & Build had planning applications approved?
Public council decisions show 11 approved applications for The Market Design & Build across 4 councils, the most recent in 2026. That's a 73% approval rate across 15 decided applications, not a self-declared claim.
What does The Market Design & Build specialise in?
The Market Design & Build lists specialist services including 3D Rendering, Architectural Design, Architectural Drawings, Basement Conversion, Basement Design, Design Consultation. If your job is one of these, look for it in their listed services or ask them to confirm for your project.
What areas does The Market Design & Build cover?
They state on their own website that they cover London. This is the business's own statement on their website, not something we have independently checked. Confirm they cover your postcode before booking.
When was The Market Design & Build's website registered?
The Market Design & Build's website has been online since 2012, according to the public domain registry. This dates the website, not necessarily when the business began trading.