Home & Garden Lead Generation: Interior Design CPA Cut 64%

A scale-tier lead-generation account in the Home & Garden vertical (interior design services) operating at a $3,000 monthly Google Ads budget reduced cost-per-lead from $177.50 to $63.45 (-64.25%) and grew conversion volume from 42 to 94.50 (+125%) over a 90-day optimization window. The account is now operating 79% below its $300 target CPA.

Key Takeaways

• CPA reduced 64% from $178 to $63 — moving dramatically below the $300 business target.
• Conversion volume more than doubled (+125%) while total spend declined 20%.
• Account runs separate campaigns for different service categories (kitchen, bathroom, etc.) with campaign-level budget optimization.
• Budget was actively rebalanced across campaigns during the window to concentrate spend on the best performers.

The Account

A scale-tier lead-generation account in the Home & Garden vertical, specifically interior design services (kitchen, bathroom, and related categories). Monthly budget around $3,000, target CPA of $300. The account runs separate campaigns per service category to allow independent budget and performance management.

The Challenge

Metric	Baseline (90 days)
Spend	$7,454.91
Conversions	42.00
CPA	$177.50
CTR	1.99%
Impressions	114,287

CPA at $178 was well inside the $300 target, but conversion volume was modest for the budget level. The team identified that category-level rebalancing could unlock substantial additional volume.

The Approach

Step 1: Category-level audit. Each service-category campaign was reviewed independently. Kitchen and bathroom campaigns were compared for efficiency and volume potential.

Step 2: Budget rebalancing. Budget was moved from underperforming categories ($30 daily to $20) and redirected to better-performing display campaigns ($15 to $25).

Step 3: Search-terms hygiene. Standard weekly review cadence applied across all category campaigns.

Step 4: Keyword list maintenance. Negative keyword lists were expanded to prevent cross-category query confusion.

The Results

Over the 90-day optimization window (November 2, 2025 to January 31, 2026):

Metric	Before (90 days)	After (90 days)	Change
Spend	$7,454.91	$5,996.23	-19.6%
Conversions	42.00	94.50	+125.0%
CPA	$177.50	$63.45	-64.3%
CTR	1.99%	2.28%	+14.6%
Impressions	114,287	175,255	+53.3%
Clicks	2,270	3,997	+76.1%

Impressions grew 53% while spend declined 20%, indicating a dramatic CPC improvement driven by better auction mix. Click volume grew 76% and conversion volume grew 125%, meaning each click was substantially more likely to convert.

Lessons Learned

1. Category-level budgets allow precise rebalancing. Running kitchen and bathroom as separate campaigns, rather than a single “interior design” campaign, made it possible to identify which category was producing and move budget accordingly.

2. Lead-gen accounts benefit from impression growth. Unlike ecommerce accounts where waste-removal typically reduces impressions, this account grew impressions 53% while reducing spend — the cheaper impressions were more relevant.

3. Small-budget local accounts have big optimization upside. On a $3,000 monthly budget, a 64% CPA reduction is worth $3,500+ in quarterly savings at the same conversion volume — material for a small business.

4. Always measure against business target, not against baseline. This account now operates at 21% of target CPA, which opens a conversation with the business about scaling the budget for more volume.

Methodology Note

Data sourced from a managed Google Ads account in the Home & Garden vertical (interior design services) operating at the scale budget tier with a local footprint. All identifying information has been removed. Performance metrics reflect the best 90-day window (November 2, 2025 to January 31, 2026) compared against the prior 90-day baseline (August 3 to November 1, 2025). The account executed 46 documented optimization actions during the measurement period. ROAS metrics are not cited because lead-generation accounts in this dataset do not reliably track conversion value. Metrics reported in USD.