GSMS Construction Ltd – Your Trusted House Extensions in Croydon Specialists
Searching for trusted house extensions in Croydon? GSMS Construction Ltd is the local Croydon specialist delivering high-quality, compliant house extensions that add valuable living space, improve layout and significantly increase property value across Croydon CR0–CR9, Purley, Shirley, Coulsdon, Bromley and South London.
Whether you need a single storey rear extension Croydon, side return extension Croydon, wrap-around, double storey or modern kitchen extension, our experienced team manages the entire project from design and planning to final handover.
✅ Free no-obligation site survey & quote ✅ Fully insured with 10-year workmanship guarantee ✅ Local Croydon builders serving CR0–CR9 and surrounding postcodes 📞 Call 07717 790273 or 07453 292996 today
Planning Portal – House Extensions & Permitted Development
GOV.UK – Permitted Development Rights for Householders (Technical Guidance)
Why Choose GSMS Construction for House Extensions in Croydon
- Deep local knowledge of Croydon homes — Victorian terraces, semis, and modern properties
- End-to-end service including design, planning permission, building regulations and construction
- Transparent fixed-price quotes with no hidden costs
- Minimal disruption to your daily life
- Proven track record of successful extensions across Croydon and South London
We focus on energy-efficient, future-proof designs that comply with current UK Building Regulations and Croydon Council requirements.
Popular Types in Croydon
- Single Storey Rear Extension Croydon — Bright open-plan kitchen-diners with bi-fold doors and roof lanterns
- Side Return Extension Croydon — Adds width and natural light to narrow Victorian terraces (highly popular in Croydon)
- Wrap-Around Extension Croydon — Combines side and rear for maximum usable space
- Double Storey Extension Croydon — Extra bedrooms or bathrooms upstairs
- Kitchen Extensions & Orangery-Style — Bespoke, light-filled designs tailored to modern family living
Many clients combine house extensions with loft conversions or full refurbishments for even greater value.
Our Professional Process in Croydon
- Free Site Survey & Consultation — We visit your Croydon home and discuss your vision honestly.
- Design & Planning Support — Collaboration with trusted architects for practical, compliant designs.
- Clear Fixed-Price Quote — Transparent costs and realistic timelines.
- Expert Construction — Skilled local trades keep the site tidy and provide regular updates.
- Final Handover — Thorough snagging, clean-up and ongoing support.
Most single-storey extensions in Croydon are completed within 3–6 months.
House Extensions Croydon Cost Guide 2026
| Extension Type | Typical Size | Estimated Total Cost (2026) |
|---|---|---|
| Single Storey Rear / Kitchen | 20–35 m² | £50,000 – £120,000 |
| Side Return Extension | 10–25 m² | £45,000 – £110,000 |
| Wrap-Around Extension | 25–50 m² | £75,000 – £170,000+ |
| Double Storey Extension | 40–70 m² | £100,000 – £230,000+ |
Prices include main construction works. Add 15–25% for VAT, architect fees, planning and contingencies. Exact fixed-price quote provided after free site survey.
Planning Permission for House Extensions
Many single-storey rear and side return extensions qualify as Permitted Development (no full planning permission needed) if they stay within size and height limits.
We handle:
- Permitted Development checks
- Full Croydon Council planning applications (when required)
- Party Wall Agreements
- Lawful Development Certificates
Our local expertise keeps your project on track and fully compliant.
Frequently Asked Questions – House Extensions in Croydon
How much do house extensions cost in Croydon in 2026? Single storey extensions typically range from £50,000–£120,000. Side returns cost £45,000–£110,000 and double storey projects start from £100,000+. Accurate quotes after free survey.
Do I need planning permission for house extensions in Croydon? Not always. Many rear and side return extensions fall under Permitted Development. We guide you through the entire process.
Are side return extensions popular in Croydon? Yes — especially on Victorian terraces. They add valuable width and light while often qualifying for Permitted Development.
How long does a house extension take in Croydon? Single storey projects usually take 3–6 months. Double storey or wrap-around extensions can take 6–9+ months.
Will a house extension increase my property value in Croydon? Yes. Well-designed extensions often recover 70–90% of the investment and make your home far more appealing to buyers.
Ready for Your House Extension in Croydon?
Extending your home is often smarter and more affordable than moving in 2026. Gain the exact space your family needs while adding long-term value.
📞 Call 07717 790273 or 07453 292996 now for your free, no-obligation site survey and quote. We usually reply the same day and can arrange a visit within 48 hours.
Website: https://gsmsconstructionltd.co.uk/
We proudly serve Croydon CR0–CR9, Purley, Coulsdon, Shirley, Bromley and South London.
Local. Expert. Guaranteed. GSMS Construction Ltd – Your Trusted House Extensions in Croydon Specialists.