Design Spec Ltd
Architectural Services. Design Spec Ltd has been vetted and approved by TrustATrader. Covering Hertfordshire, London and East Anglia.
Membership number TT12341
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Register GuaranteeAbout Design Spec Ltd, Bishop's Stortford
Fixed-Fee Architectural Design for Essex & Hertfordshire
Loft conversions, house extensions, garage conversions with same-day quotes. No hourly billing, no hidden costs. Planning permission & building regulations included. Every project comes with free vetted builder introductions through our Connect network.
✓ Fixed-fee pricing (transparent, no surprises)
✓ Planning applications & building regs drawings included
✓ Structural calculations & party wall surveying
✓ Trusted local experts serving South East
✓ Free intro to vetted local builders once approved
Why Design Spec?
- Same-day fixed quotes
- Unlimited design revisions included
- Planning permission paperwork handled
- Direct access to trusted builder network
- 10+ years, 100s of completed projects
Serving: Bishop's Stortford | Sawbridgeworth | Ware | Hertford | Stansted | Saffron Walden | Great Dunmow | Harlow | Epping | Loughton | Ongar | Hatfield | Welwyn Garden City | Theydon Bois
Contact us today!
Website: www.designspec.co.uk
Email: info@designspec.co.uk
Telephone: 01702 567955
Photo gallery
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
All other media
122 photos
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Design Spec Ltd
- Identification checked
- Company address verified
- Customer references checked
- Agreed to TrustATrader's high standards
- Agreed to complaints procedure
Hertfordshire
Insurance details
| Provider | Hiscox Insurance Company Ltd |
|---|---|
| Verified | 30th June 2026 |
Associations
Reviews (89)
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Average rating: 5.0 out of 5
Review by Paolo Cosentino
on 13th July 2026
"Fast and reilable"
- 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: 4.83 out of 5
Review by Andrew
on 8th July 2026
"Design spec helped produce a planning pack for a room above the garage of our house. I have found Lauren helpful and responsive when preparing drawings, and would highly recommend."
- 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: 4 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 Khemindra
on 26th June 2026
"Marcus was great all throughout the process, from visit to final drawings and renders; he took the time to understand and translate the brief."
- 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 Jason
on 19th June 2026
"Designspec ltd have been great with our home improvement project (porch, side building, kitchen and loft). Marcus and the team are really collaborative, responsive, and have produced the planning application design we envisaged. They have great creative ideas, and useful examples from other projects. Their unlimited design changes is great as we can openly discuss options without concern of rising design costs. They have good understanding of phased builds, and financial impact associated with the design. Would definately reccomend to others."
Trader reply: "Thank you for taking the time to share your experience. We take great pride in delivering collaborative, financially sound design solutions, and we are delighted that Marcus and the team could bring your vision to life. We deeply appreciate your recommendation and wish you the very best with your upcoming planning application."
- 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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