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How Accurate Building Estimates Can Improve Project Delivery Times

Hiring a professional construction estimating service is a smart step towards keeping your project on time, on budget, and free from surprises. But even the best service can only deliver great results if used properly.

Over the years, we’ve seen many clients unknowingly fall into the same traps — mistakes that lead to budget overruns, scope confusion, and delayed timelines.

In this blog, we’ll explore the most common mistakes to avoid when using a construction estimating service — and how you can get the very best value from your investment.

1. Providing Incomplete or Vague Information

Estimators are only as accurate as the information they’re given.

Mistake: Sending over half-finished drawings, rough sketches, or basic ideas with no detail.

Why it’s a problem:

  • Leads to inaccurate cost assumptions
  • Key elements might be missed or undercosted

  • Forces revisions later, slowing everything down

✅ Solution: Share detailed architectural plans, structural information, site photos, and any planning constraints upfront. The more data you provide, the better the estimate.

2. Not Clarifying the Scope of Work

Without a clear definition of what’s included in your project, the estimate can quickly become unreliable.

Mistake: Leaving out key scope details — like whether landscaping, interior fittings, or utility connections are included.

Why it’s a problem:

  • Creates misunderstandings between client, estimator, and contractors
  • Inflates or deflates the projected cost

  • Makes it difficult to compare quotes accurately

✅ Solution: Outline everything you expect to be included in your build — and confirm with your estimator what’s covered in the final report.

3. Choosing the Cheapest Estimating Service

We understand budgets are tight — but when it comes to cost planning, you often get what you pay for.

Mistake: Picking a provider based solely on price.

Why it’s a problem:

  • Low-cost services may cut corners or use generic rates
  • Limited support or revision options

  • Inexperienced estimators may overlook critical details

✅ Solution: Focus on value, not just cost. A slightly higher fee for a more experienced, detailed service can save you thousands during construction.

4. Ignoring Regional Market Conditions

Construction costs can vary significantly depending on where you’re building.

Mistake: Using cost data from a different part of the UK — or worse, overseas sources.

Why it’s a problem:

  • Labour and material rates fluctuate regionally
  • Site access, logistics, and local rules also impact price

  • Can throw your budget off before you even start

✅ Solution: Always work with an estimator who understands local conditions. At Reltic, we tailor estimates based on your exact project location.

5. Not Using the Estimate as a Live Document

An estimate shouldn’t be something you look at once and file away.

Mistake: Treating the estimate as a one-off document rather than a reference tool.

Why it’s a problem:

  • Project costs change as designs evolve
  • You lose track of actual spend vs forecast

  • Harder to manage variations or justify decisions

✅ Solution: Keep your estimate up to date. At Reltic, we offer ongoing support — including updates, revisions, and assistance with tender evaluations or valuations during the build.

6. Failing to Review and Ask Questions

Many clients receive their cost plan, scan it quickly, and move on.

Mistake: Not reviewing the estimate in detail or seeking clarification.

Why it’s a problem:

  • You may miss cost-saving opportunities
  • Errors or assumptions go unnoticed

  • You don’t fully understand where your money is going

✅ Solution: Schedule a call or meeting to review your estimate with the consultant. Ask questions, raise concerns, and make sure everything makes sense before moving forward.

7. Delaying the Estimating Process

Time is money — especially in construction.

Mistake: Waiting until the last minute to request an estimate.

Why it’s a problem:

  • You may rush the brief or overlook key details
  • Delays tendering or financing applications

  • Limits your ability to make design-led cost decisions

✅ Solution: Engage an estimating consultant early in your project. You’ll have more flexibility, better insight, and time to refine your approach.

Why Choose Reltic Construction Consultants?

At Reltic, we go beyond basic estimating. We help you:

✅ Clarify your scope and priorities
✅ Produce accurate, tailored cost plans
✅ Avoid costly mistakes and delays
✅ Gain full visibility of your construction budget
✅ Make informed decisions at every stage

Whether you’re planning a refurbishment, loft conversion, extension, or new build, we make sure your project starts on solid financial ground — and stays there.

📞 Contact Us

Contact Reltic Construction Consultants today and speak to our team about your project.

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🌟 Want to see what we’ve already delivered?
Explore our latest work here: https://relticcc.co.uk/projects/

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