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Loft Conversions & Extensions in Cardiff

Dormer, hip-to-gable, mansard, and Velux loft conversions, attic room renovations, and turnkey structural alterations.

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9 Greater Cardiff Districts
Quick Postal District Navigator: ● Showing All Districts
All Areas CF10 (32) CF11 (75) CF14 (96) CF15 (34) CF23 (60) CF24 (78) CF3 (84) CF5 (66) CF64 (85)
Official Municipal Planning & Building Control Guidance

Planning Permission & Building Regs in Cardiff

Statutory local guidelines for Loft Conversions & Extensions under Cardiff City Council
Cardiff City Council Planning Portal Building Control
Permitted Development & Statutory Standards

Rear dormer loft additions permitted up to 40m³ (terraced) or 50m³ (semi-detached) under Class B. Materials must match existing finishes.

Article 4 Directions & Conservation Zones

Designated conservation areas across Cardiff require adherence to statutory Article 4 directions. Property owners must preserve original architectural profiles and consult the local planning register before altering highway-facing elevations.

Key Protected Zones: Cardiff Historic Core, Cathedral Quarter, Heritage Suburbs (20 designated areas).
Verified by Editorial Desk (Sep 2026) Request Council-Compliant Quote →
Dormer Loft Conversion Architectural Cross-Section Technical CAD Blueprint

Dormer Loft Conversion Architectural Cross-Section

Permitted development cubic volume allowance: 40m³ (terraced) / 50m³ (semi/detached) with RSJ structural steel placement.

Reference: Approved Document B (Fire Safety) & Class B Permitted Development
Showing 1–15 of 15 verified loft conversions & extensions in Greater Cardiff
Zenith Design & Build Ltd.

Zenith Design & Build Ltd.

Verified Local Listing
★ 5.00 (67 reviews)
• Base: CF64 • Quotes on Request
Loft Conversions & Extensions
07584 163786 View Profile & Reviews
Le Guilcher Architecture

Le Guilcher Architecture

Verified Local Listing
★ 5.00 (46 reviews)
• Base: CF64 • Quotes on Request
Loft Conversions & Extensions Architects & Surveyors
029 2070 3944 View Profile & Reviews
MCS Construction & Developments

MCS Construction & Developments

Verified Local Listing
★ 5.00 (20 reviews)
• Base: CF5 • Quotes on Request
Loft Conversions & Extensions Builders & Bricklayers
07861 874002 View Profile & Reviews
Gentles Construction Ltd

Gentles Construction Ltd

Verified Local Listing
★ 5.00 (16 reviews)
• Base: CF14 • Quotes on Request
Loft Conversions & Extensions
029 2120 0126 View Profile & Reviews
Wooden Artefact Ltd

Wooden Artefact Ltd

Verified Local Listing
★ 5.00 (12 reviews)
• Base: CF3 • Quotes on Request
Loft Conversions & Extensions Joiners & Carpenters
029 2115 1595 View Profile & Reviews
Pro Loft Conversions Cardiff

Pro Loft Conversions Cardiff

Verified Local Listing
★ 5.00 (1 reviews)
• Base: CF24 • Quotes on Request
Loft Conversions & Extensions
029 2009 9170 View Profile & Reviews
Abc Advanced Building Contractors

Abc Advanced Building Contractors

Verified Local Listing
★ 5.00 (1 reviews)
• Base: CF64 • Quotes on Request
Loft Conversions & Extensions
029 2070 1191 View Profile & Reviews
Starlight Loft Conversions Ltd

Starlight Loft Conversions Ltd

Verified Local Listing
★ 5.00 (0 reviews)
• Base: CF14 • Quotes on Request
Loft Conversions & Extensions
029 2052 2138 View Profile & Reviews
Let’s Build

Let’s Build

Verified Local Listing
★ 5.00 (0 reviews)
• Base: CF23 • Quotes on Request
Loft Conversions & Extensions
07482 928404 View Profile & Reviews
All Aspects CDF Ltd

All Aspects CDF Ltd

Verified Local Listing
★ 4.90 (14 reviews)
• Base: CF64 • Quotes on Request
Loft Conversions & Extensions Builders & Bricklayers
029 2003 6677 View Profile & Reviews
Sky Blue Lofts

Sky Blue Lofts

Verified Local Listing
★ 4.80 (30 reviews)
• Base: CF24 • Quotes on Request
Loft Conversions & Extensions
07359 603774 View Profile & Reviews
RGB Construction Ltd

RGB Construction Ltd

Verified Local Listing
★ 4.70 (73 reviews)
• Base: CF3 • Quotes on Request
Loft Conversions & Extensions Bathroom & Kitchen Fitters
07946 452571 View Profile & Reviews
FORTY BUILDERS LTD

FORTY BUILDERS LTD

Verified Local Listing
★ 4.70 (32 reviews)
• Base: CF23 • Quotes on Request
Loft Conversions & Extensions
07817 269005 View Profile & Reviews
Gallery Loft conversions

Gallery Loft conversions

Verified Local Listing
★ 4.50 (19 reviews)
• Base: CF15 • Quotes on Request
Loft Conversions & Extensions
029 2081 0425 View Profile & Reviews
Dragon Construction Ltd

Dragon Construction Ltd

Verified Local Listing
★ 4.30 (11 reviews)
• Base: CF11 • Quotes on Request
Loft Conversions & Extensions
029 2037 1341 View Profile & Reviews

Local Housing & Property Considerations in Cardiff

Victorian and Edwardian bay-fronted stone terraces with Welsh slate roofing, along with modern Cardiff Bay waterfront properties. When commissioning work in Cardiff, always ensure your tradesperson has direct experience with local building styles, planning regulations, and regional conservation guidelines.

Common Questions & Answers

Frequently Asked Questions About Loft Conversions & Extensions in Cardiff

How much does a Loft-conversions cost per hour in Cardiff?
In Cardiff, a qualified Loft-conversions typically charges between £45 – £75 per hour, or £280 – £450 for a full working day. Rates vary depending on emergency callouts, required materials, and project complexity.
What credentials or certifications should I check for a Loft-conversions in Cardiff?
Always verify that your Loft-conversions is accredited by competent person schemes. For gas or heating work, registration with the Gas Safe Register is a legal requirement. Additionally, check for active Public Liability Insurance (minimum £2 million recommended).
How many verified Loft-conversions are available in Cardiff on HireCardiff?
We currently index 15 screened Loft-conversions operating across Cardiff and surrounding postal districts, maintaining an average customer satisfaction rating of 4.9★ based on 342 authentic customer reviews via Google.
Are quotes free, and do Loft-conversions in Cardiff charge a call-out fee?
Most reputable Loft-conversions in Cardiff provide free, no-obligation written quotes for scheduled home improvement projects. For emergency out-of-hours callouts (evenings/weekends), a minimum call-out charge of 1 hour is standard.