Every other week, a Central Ohio homeowner asks us some version of the same question: 'Why is my exterior quote $4,000 higher than my interior quote when my house is only 2,500 square feet?' It's a reasonable question, and the answer goes well beyond square footage. After 25 years running Scott's Painting out of Pickerington, we've learned that exterior and interior painting are really two different trades that happen to use some of the same tools.
This guide breaks down the cost mechanics side by side: surface area, prep work, paint and material split, labor, equipment, weather dependencies, and long-term ROI. By the end you'll understand exactly where your money goes on each type of project and which one to tackle first. Numbers in here are based on what we quote every week in Fairfield, Franklin, and Licking counties in 2026.
Quick Comparison: Interior vs Exterior at a Glance
Before we go deep, here's the 30-second version. Everything below this table explains the 'why' behind the numbers.
| Metric | Interior (2,500 sq ft) | Exterior (2,500 sq ft) |
|---|---|---|
| Total paintable surface area | ~7,000–9,000 sq ft | ~3,500–4,500 sq ft |
| Typical cost range | $3,500–$7,500 | $5,500–$12,000 |
| Project duration | 3–6 days | 5–8 days |
| Prep intensity | Moderate | Heavy |
| Weather dependent | No | Yes — critical |
| ROI on resale | 5–10% room-by-room | 55–65% curb appeal boost |
Why Exterior Usually Costs More Per Square Foot
On a per-square-foot basis, exterior work in Central Ohio runs roughly $2.50–$5 per square foot of actual siding surface, while interior runs $1.50–$3.50 per square foot of wall surface. The extra cost comes from four places: ladder and scaffolding work slows productivity significantly, Ohio weather windows force tight scheduling, prep work is extensive and physical, and exterior paints cost 20–40% more than comparable-grade interior paints.
Surface Area: Most Homeowners Underestimate Exteriors
A 2,500 sq ft two-story colonial doesn't have 2,500 sq ft of exterior siding. It has closer to 3,800–4,200 sq ft of paintable exterior surface once you account for both stories, gables, soffits, fascia, and trim. Compare that to the interior of the same home, which has roughly 7,500–8,500 sq ft of paintable wall and ceiling surface across all rooms.
Interior wins on raw square footage almost every time — but exterior wins on cost per square foot by a wide margin because of everything else on this list.
Prep Work Comparison
Prep is where most painting jobs are actually won or lost. Interior and exterior prep look very different in Ohio:
- Interior prep: patching nail holes, skim-coating problem areas, sanding glossy trim, taping baseboards, covering furniture and flooring, removing outlet and switch covers
- Exterior prep: pressure washing to remove dirt, mildew, and chalking; scraping loose paint; feather-sanding transitions; spot-priming bare wood or stained areas; caulking all siding-to-trim joints; replacing failed caulk at windows and doors
- On Central Ohio homes older than 20 years, exterior prep alone routinely runs 30–50% of total project hours
Paint & Material Cost Split
Materials are a bigger share of an exterior job than most homeowners realize. Here's a real side-by-side breakdown for a 2,500 sq ft Central Ohio home using premium paint:
| Line Item | Interior 2,500 sq ft | Exterior 2,500 sq ft |
|---|---|---|
| Finish paint (gallons + cost) | ~12 gal / $780 | ~18 gal / $1,620 |
| Primer | $120 (spot priming only) | $350 (extensive spot priming) |
| Caulk, patching, fillers | $80 | $250 |
| Masking, plastic, misc. supplies | $120 | $220 |
| Total materials | ~$1,100 | ~$2,440 |
Labor Cost: Where the Real Money Goes
On nearly every painting job in Central Ohio, labor is 70–80% of the total cost. On a $6,000 interior repaint, you're paying roughly $4,500 in labor and $1,100 in materials, with the remainder in overhead and profit. On a $10,000 exterior, labor is closer to $7,500 and materials $2,400.
The reason labor dominates is simple: painting is one of the last trades that hasn't been mechanized. A two-person crew spraying and back-rolling an exterior still averages only 200–300 square feet per hour on well-prepped siding. Ladder work drops that to 150 square feet per hour. Interior cut-and-roll work is roughly 150–200 square feet per hour per painter. There's no shortcut.
Equipment Needs Differ Significantly
Interior and exterior jobs require overlapping but distinct toolkits. This drives per-job equipment amortization:
- Interior tools: drop cloths, ladders up to 8 ft, hand tools, rollers, cut buckets, HVLP sprayer for cabinets and trim
- Exterior tools: pressure washer (3,000+ PSI), 28–40 ft extension ladders, scaffolding, airless sprayers, 5-gallon mix buckets, body harnesses for multi-story work
- Safety equipment: OSHA-compliant ladder tie-offs, fall protection above 6 ft, respirators for older painted surfaces
- Consumables: exterior work burns through way more plastic sheeting, tape, caulk tubes, and sprayer tips
Weather Dependencies for Ohio Projects
Interior work can happen year-round in Ohio. We paint through January, February, and the dead of summer without issue as long as the HVAC is keeping the home in a reasonable temperature and humidity range. Exterior work is a completely different game.
Central Ohio's workable exterior window runs roughly mid-April through early November. Inside that window, we still need surface temperatures between 50°F and 85°F, no rain in the 24 hours after application, relative humidity below 85%, and ideally shade rather than direct afternoon sun on the active wall. A wet May or hot humid July can easily cost us 5–10 working days, which we have to price into the quote.
ROI Comparison: Which Pays You Back More?
If you're painting to prep for a sale, exterior is almost always the better investment. National Remodeling Magazine consistently puts exterior paint ROI in Central Ohio at 55–65% of cost recovered at resale through curb appeal — but more importantly, it often shortens days-on-market and reduces the lowball offers that tired-looking homes invite.
Interior repaint ROI is more modest — typically 5–10% per room — but concentrated where it matters. Kitchen cabinet repainting is the exception: a $3,500–$5,500 cabinet refinish in Central Ohio often returns close to 70% at resale because it transforms the most-photographed room in the house at a fraction of a replacement cost.
Doing Both Together: When It Saves You Money
Bundling interior and exterior in the same season can shave 8–15% off the combined total. The savings come from three places: one mobilization instead of two, continuous crew scheduling without gaps, and bulk paint purchasing across product lines. We typically run exteriors in summer and interiors in winter for bundled clients, spreading the work across the calendar without losing the discount.
How to Decide Which to Do First
- Visible exterior failure (peeling, chalking, bare wood) — do exterior first to prevent substrate damage
- Water-stained ceilings or walls inside — fix the roof and exterior caulk first, then interior
- Selling within 12 months — exterior first, interior second
- Just moved in — interior first so you can enjoy the home
- Tight budget, one project only — whichever is in worse shape structurally wins
- Kitchen cabinets looking dated — highest-ROI interior project, prioritize even over full interior repaint
Quote Both at Once and Save
Scott's Painting offers a bundled interior + exterior discount for Central Ohio homeowners who plan both projects in the same calendar year. Call (614) 809-9730 for a combined estimate — one visit, one itemized quote.