Interior designers are often stuck in the middle—encouraging creative decisions, while clients panic about budget.
That pressure only grows when working under a cost plus contract, where every change or upgrade can feel like a financial risk. With fixed lump sum contracts, however, there’s structure and cost certainty from the outset—giving you more freedom to design with confidence, not caution.
At RSD Constructions, we collaborate with interior designers early, pricing from real documentation and working to deliver the vision without creating budget stress.
Why Cost Plus Contracts Undermine Great Design
With a cost plus contract:
Every fixture upgrade becomes a budget unknown
There’s often a tense back-and-forth on what’s “worth it”
Clients may push for cheaper substitutions to “stay in control”
You become the de facto budget manager—whether you want to or not
Even small decisions—like changing a pendant light or adding feature tiling—can trigger surprise invoices under cost plus. The builder simply passes the real cost on, with margin added, often without offering options or creative solutions.
Why Fixed Price = Creative Confidence
With a fixed lump sum contract, the entire cost of the build—including finishes, allowances, and scope—is locked in before work starts.
This benefits you, the designer, because:
Your selections are already priced and approved
The client isn’t worried about triggering costs mid-project
There’s clarity on what can and can’t be changed (and how much it will cost)
You don’t have to constantly “defend” your design from a financial lens
It lets you do what you do best—design for mood, texture, function, and form—without needing to hold the client’s calculator.
We Scope Your Work Properly
At RSD Constructions, we collaborate with designers from the pre-construction stage:
We work from full finish schedules and selection documents
We ask the right questions before tender, not during the fit-off
We provide clear PC/PS allowances based on real pricing—not lowball placeholders
We welcome direct collaboration so details aren’t lost in translation
Design Without the Doubt
If you’ve ever had a project where:
The budget felt like a moving target
The client lost trust in the builder’s costing
Or your design was blamed for “cost blowouts”
Then you already know the value of a builder who prices properly and builds to a fixed contract.
Want to work with a construction team that supports your creativity and protects your client? Let’s talk.
