Design Spec Ltd
Architectural Services. Design Spec Ltd has been vetted and approved by TrustATrader. Covering London and East Anglia.
Membership number TT12341
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Register GuaranteeAbout Design Spec Ltd, Southend
About Design Spec Ltd, Southend-on-Sea
Architectural Designer in Southend-on-Sea | Fixed Fee | Design Spec
Design Spec is a specialist residential architectural design practice serving Southend-on-Sea and the surrounding Essex coast. We help homeowners plan, design and gain approval for loft conversions, house extensions, garage conversions and major home renovations - all on a transparent fixed fee, with no hourly billing and no hidden costs.
Every project includes planning permission drawings, building regulations packages, and a free introduction to vetted local builders through our Connect network once your plans are approved.
Our Southend-On-Sea services include:
Loft conversions: dormer & hip-to-gable
- Single and double storey rear extensions
- Side return and wraparound extensions
- Garage conversions and outbuildings
- Planning permission applications
- Building regulations drawings
- Structural calculations
- Party wall surveying
Why homeowners in Southend choose Design Spec:
- Fixed fee from day one: same-day written quote, no surprises
- Unlimited design revisions included as standard
- Planning applications handled end to end
- Structural calculations and party wall surveying available
- Free introduction to trusted, vetted local builders once approved
- 10+ years experience, hundreds of completed projects across Essex
- One-to-one project management throughout
Areas we cover from Southend-On-Sea:
Southend-on-Sea · Westcliff-on-Sea · Leigh-on-Sea · Thorpe Bay · Shoeburyness · Chalkwell · Prittlewell · Rochford · Rayleigh · Wickford · Basildon · Benfleet · Canvey Island · Hadleigh · Hockley
📞 01702 567955
✉️ info@designspec.co.uk
🌐 designspec.co.uk
Photo gallery
Modern Rear Extension with Rooflights & Open-Plan Living
5 photos
Complete Home Renovation
16 photos
Contemporary Luxury Loft Conversion
9 photos
Premium Light-Filled Extension
10 photos
Elegant Dining Room Extensions
14 photos
Contemporary House Extensions
11 photos
Luxury Living Spaces
12 photos
Bespoke House Extensions
13 photos
Open Plan Living in Essex
10 photos
Modern Kitchen Extension
8 photos
Design Spec Ltd
- Identification checked
- Company address verified
- Customer references checked
- Agreed to TrustATrader's high standards
- Agreed to complaints procedure
Essex
Insurance details
| Provider | Hiscox Insurance Company Ltd |
|---|---|
| Verified | 30th June 2026 |
Associations
Reviews (100)
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Average rating: 4.67 out of 5
Review by Barbara
on 4th November 2026
"Marcus and Laura have been very helpful. Helping me through complexities of applying for planing permission on a listed building ."
Trader reply: "Thank you for your review! We're pleased to hear that Marcus and Lauren have been able to guide you through the planning process. We appreciate your feedback!"
- Initial impression Initial impression: 5 out of 5.0
- Punctuality Punctuality: 4 out of 5.0
- Cleanliness Cleanliness: 5 out of 5.0
- Quality Quality: 5 out of 5.0
- Value Value: 4 out of 5.0
- Overall opinion Overall opinion: 5 out of 5.0
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Average rating: 5.0 out of 5
Review by E
on 2nd October 2026
"Currently working with Design Spec on our design and planning permission submission. The team has been helpful and responsive so far! Since we are still in the middle of the project, I am leaving a 5 star review for now and will come back to update this with my final feedback once the planning process and building control are officially finished."
- Initial impression Initial impression: 5 out of 5.0
- Punctuality Punctuality: 5 out of 5.0
- Cleanliness Cleanliness: 5 out of 5.0
- Quality Quality: 5 out of 5.0
- Value Value: 5 out of 5.0
- Overall opinion Overall opinion: 5 out of 5.0
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Average rating: 5.0 out of 5
Review by Hari
on 21st September 2026
"Working closely with Lauren for quite a few months on my plans for extending my home. She has been remarkable and so patient. The key thing to Lauren and the team at DesignSpec. Is that it is no hard sell or push from them. Their approach is calm, professional from the very first call, to meet up and then subsequent discussions. Planning is tricky and where I live it is particularly a fine line of acceptance or not. So, I can only recommend the experience, professional and steady support of Lauren and DesignSpec. Really the best choice and decision I made in choosing them over anyone else."
- Initial impression Initial impression: 5 out of 5.0
- Punctuality Punctuality: 5 out of 5.0
- Cleanliness Cleanliness: 5 out of 5.0
- Quality Quality: 5 out of 5.0
- Value Value: 5 out of 5.0
- Overall opinion Overall opinion: 5 out of 5.0
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Average rating: 5.0 out of 5
Review by Sazan
on 20th August 2026
"We are very pleased with the service design spec has offered us. Thank you to Lauren, who handled our project she was very accommodating."
Trader reply: "Thank you for the feedback! We really appreciate you taking the time to leave us a review and are pleased you were happy with the service and support from Lauren."
- Initial impression Initial impression: 5 out of 5.0
- Punctuality Punctuality: 5 out of 5.0
- Cleanliness Cleanliness: 5 out of 5.0
- Quality Quality: 5 out of 5.0
- Value Value: 5 out of 5.0
- Overall opinion Overall opinion: 5 out of 5.0
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