Building an extension is exciting, but it’s also a serious investment. One of the most common concerns homeowners have is: “How do I make sure everything stays on track?”
The answer lies in good project management. Clear contracts, structured payments, and trusted builders are the three pillars of a smooth, stress-free build. At Reltic Extend, we bring all of these together under one roof – giving you complete clarity from start to finish.
In this guide, we’ll show you how to manage your project with confidence, avoid common pitfalls, and enjoy the process of creating your dream extension.
Why Contracts Matter
A contract isn’t just paperwork – it’s your safety net. A well-written contract ensures:
Transparency – you know exactly what’s included,
Accountability – builders commit to deadlines and quality,
Protection – you’re safeguarded against disputes,
Confidence – everyone knows what to expect.
At Reltic Extend, our contracts outline the full journey, from the first sketch to the final handover. See how we do it in our How We Work section.
Structuring Payments the Right Way
Payments can be a source of stress if not handled properly. The best approach is a staged payment plan:
Deposit – secures your project and scheduling,
Stage payments – tied to progress milestones (foundation, structure, finishes),
Final payment – only after handover and approval.
This approach gives you security while ensuring builders are fairly paid.
💡 Our Cost Calculator helps set realistic budgets before payments even begin.
Choosing Reliable Builders
Even the best contract won’t help if your builders aren’t trustworthy. Look for:
A proven portfolio of Rear Extensions, Side Extensions or Kitchen Extensions,
Transparent pricing and timelines,
Positive reviews or local recommendations,
A design and build service that manages everything.
With Reltic Extend, you don’t need to juggle multiple contractors – we handle design, permissions, and construction as one.
Choosing Reliable Builders
Even the best contract won’t help if your builders aren’t trustworthy. Look for:
A proven portfolio of Rear Extensions, Side Extensions or Kitchen Extensions,
Transparent pricing and timelines,
Positive reviews or local recommendations,
A design and build service that manages everything.
With Reltic Extend, you don’t need to juggle multiple contractors – we handle design, permissions, and construction as one.
Communication – The Glue That Holds Projects Together
Miscommunication causes delays, budget overruns, and frustration. The solution? Keep conversations clear and regular.
Agree on a single point of contact,
Request weekly progress updates,
Use visuals (like drawings or 3D models) to check design details,
Keep records of any changes.
Our Design Build Process ensures nothing gets lost in translation.
Handling Changes Without Chaos
It’s normal to tweak details during a project – but changes can quickly spiral if not managed. To stay in control:
Discuss potential cost/time impacts in writing,
Avoid big design changes once construction has started,
Use professionals who build flexibility into contracts.
This approach keeps your project adaptable but avoids nasty surprises.
Regional Insights: London & Surrey
Contract and payment expectations can vary by region:
North London – side return projects often need tight schedules due to limited access,
South London – wraparounds may involve more trades, requiring detailed coordination,
East London – compact builds benefit from simple staged payments,
West London – premium projects require detailed contracts with high-end finishes,
Surrey – larger builds mean longer timelines, making staged payments essential.
Examples of complete service in action
- Rear Extensions – perfect for open-plan kitchens and family rooms.
- Side Return Extensions – ideal for narrow London homes.
- Double Storey Extensions – a cost-effective way to double your space.
Mistakes to Avoid
Paying too much upfront,
Starting work without a signed contract,
Not confirming costs for changes,
Choosing builders based on price alone.
Our Warranty and Insurance ensures your project is protected, giving you peace of mind from start to finish.
Why Work With a Design & Build Partner
Managing separate architects, builders, and subcontractors can be stressful. With a design and build service like Reltic Extend, everything is handled under one roof:
One contract,
One payment structure,
One trusted team.
This approach eliminates confusion, keeps budgets tight, and ensures your project finishes on time.
See more on our Who We Are page.
Why choose Reltic Extend?
By offering a complete service, we give you:
peace of mind – everything handled by one trusted team,
control – clear budgets and timelines,
value – a home extension designed to increase your property’s worth,
support – guidance at every step, from planning to handover.
Meet the people who make it happen on our Who We Are page.
Ready for a complete extension service?
Want peace of mind for your extension project?
👉 Start with our free Cost Calculator to set your budget.
Or visit Who We Are to discover how Reltic Extend delivers stress-free extensions across London and Surrey.
👉 Contact us today via our Contact page. Let’s plan your dream extension and deliver it with clarity, quality, and care.
